Import bind-9.18.24 (previous was 9.16.42)

--- 9.18.24 released ---

6343. [bug] Fix case insensitive setting for isc_ht hashtable.
[GL #4568]

--- 9.18.23 released ---

6322. [security] Specific DNS answers could cause a denial-of-service
condition due to DNS validation taking a long time.
(CVE-2023-50387) [GL #4424]

6321. [security] Change 6315 inadvertently introduced regressions that
could cause named to crash. [GL #4234]

6320. [bug] Under some circumstances, the DoT code in client
mode could process more than one message at a time when
that was not expected. That has been fixed. [GL #4487]

--- 9.18.22 released ---

6319. [func] Limit isc_task_send() overhead for RBTDB tree pruning.
[GL #4383]

6317. [security] Restore DNS64 state when handling a serve-stale timeout.
(CVE-2023-5679) [GL #4334]

6316. [security] Specific queries could trigger an assertion check with
nxdomain-redirect enabled. (CVE-2023-5517) [GL #4281]

6315. [security] Speed up parsing of DNS messages with many different
names. (CVE-2023-4408) [GL #4234]

6314. [bug] Address race conditions in dns_tsigkey_find().
[GL #4182]

6312. [bug] Conversion from NSEC3 signed to NSEC signed could
temporarily put the zone into a state where it was
treated as unsigned until the NSEC chain was built.
Additionally conversion from one set of NSEC3 parameters
to another could also temporarily put the zone into a
state where it was treated as unsigned until the new
NSEC3 chain was built. [GL #1794] [GL #4495]

6310. [bug] Memory leak in zone.c:sign_zone. When named signed a
zone it could leak dst_keys due to a misplaced
'continue'. [GL #4488]

6306. [func] Log more details about the cause of "not exact" errors.
[GL #4500]

6304. [bug] The wrong time was being used to determine what RRSIGs
where to be generated when dnssec-policy was in use.
[GL #4494]

6302. [func] The "trust-anchor-telemetry" statement is no longer
marked as experimental. This silences a relevant log
message that was emitted even when the feature was
explicitly disabled. [GL #4497]

6300. [bug] Fix statistics export to use full 64 bit signed numbers
instead of truncating values to unsigned 32 bits.
[GL #4467]

6299. [port] NetBSD has added 'hmac' to libc which collides with our
use of 'hmac'. [GL #4478]

--- 9.18.21 released ---

6297. [bug] Improve LRU cleaning behaviour. [GL #4448]

6296. [func] The "resolver-nonbackoff-tries" and
"resolver-retry-interval" options are deprecated;
a warning will be logged if they are used. [GL #4405]

6294. [bug] BIND might sometimes crash after startup or
re-configuration when one 'tls' entry is used multiple
times to connect to remote servers due to initialisation
attempts from contexts of multiple threads. That has
been fixed. [GL #4464]

6290. [bug] Dig +yaml will now report "no servers could be reached"
also for UDP setup failure when no other servers or
tries are left. [GL #1229]

6287. [bug] Recognize escapes when reading the public key from file.
[GL !8502]

6286. [bug] Dig +yaml will now report "no servers could be reached"
on TCP connection failure as well as for UDP timeouts.
[GL #4396]

6282. [func] Deprecate AES-based DNS cookies. [GL #4421]

--- 9.18.20 released ---

6280. [bug] Fix missing newlines in the output of "rndc nta -dump".
[GL !8454]

6277. [bug] Take into account local authoritative zones when
falling back to serve-stale. [GL #4355]

6275. [bug] Fix assertion failure when using lock-file configuration
option together -X argument to named. [GL #4386]

6274. [bug] The 'lock-file' file was being removed when it
shouldn't have been making it ineffective if named was
started 3 or more times. [GL #4387]

6271. [bug] Fix a shutdown race in dns__catz_update_cb(). [GL #4381]

6269. [maint] B.ROOT-SERVERS.NET addresses are now 170.247.170.2 and
2801:1b8:10::b. [GL #4101]

6267. [func] The timeouts for resending zone refresh queries over UDP
were lowered to enable named to more quickly determine
that a primary is down. [GL #4260]

6265. [bug] Don't schedule resign operations on the raw version
of an inline-signing zone. [GL #4350]

6261. [bug] Fix a possible assertion failure on an error path in
resolver.c:fctx_query(), when using an uninitialized
link. [GL #4331]

6254. [cleanup] Add semantic patch to do an explicit cast from char
to unsigned char in ctype.h class of functions.
[GL #4327]

6252. [test] Python system tests have to be executed by invoking
pytest directly. Executing them with the legacy test
runner is no longer supported. [GL #4250]

6250. [bug] The wrong covered value was being set by
dns_ncache_current for RRSIG records in the returned
rdataset structure. This resulted in TYPE0 being
reported as the covered value of the RRSIG when dumping
the cache contents. [GL #4314]

--- 9.18.19 released ---

6246. [security] Fix use-after-free error in TLS DNS code when sending
data. (CVE-2023-4236) [GL #4242]

6245. [security] Limit the amount of recursion that can be performed
by isccc_cc_fromwire. (CVE-2023-3341) [GL #4152]

6244. [bug] Adjust log levels on malformed messages to NOTICE when
transferring in a zone. [GL #4290]

6241. [bug] Take into account the possibility of partial TLS writes
in TLS DNS code. That helps to prevent DNS messages
corruption on long DNS over TLS streams. [GL #4255]

6240. [bug] Use dedicated per-worker thread jemalloc memory
arenas for send buffers allocation to reduce memory
consumption and avoid lock contention. [GL #4038]

6239. [func] Deprecate the 'dnssec-must-be-secure' option.
[GL #3700]

6237. [bug] Address memory leaks due to not clearing OpenSSL error
stack. [GL #4159]

6235. [doc] Clarify BIND 9 time formats. [GL #4266]

6234. [bug] Restore stale-refresh-time value after flushing the
cache. [GL #4278]

6232. [bug] Following the introduction of krb5-subdomain-self-rhs
and ms-subdomain-self-rhs update rules, removal of
nonexistent PTR and SRV records via UPDATE could fail.
[GL #4280]

6231. [func] Make nsupdate honor -v for SOA requests if the server
is specified. [GL #1181]

6230. [bug] Prevent an unnecessary query restart if a synthesized
CNAME target points to the CNAME owner. [GL #3835]

6227. [bug] Check the statistics-channel HTTP Content-length
to prevent negative or overflowing values from
causing a crash. [GL #4125]

6224. [bug] Check the If-Modified-Since value length to prevent
out-of-bounds write. [GL #4124]

--- 9.18.18 released ---

6220. [func] Deprecate the 'dialup' and 'heartbeat-interval'
options. [GL #3700]

6219. [bug] Ignore 'max-zone-ttl' on 'dnssec-policy insecure'.
[GL #4032]

6215. [protocol] Return REFUSED to GSS-API TKEY requests if GSS-API
support is not configured. [GL #4225]

6213. [bug] Mark a primary server as temporarily unreachable if the
TCP connection attempt times out. [GL #4215]

6212. [bug] Don't process detach and close netmgr events when
the netmgr has been paused. [GL #4200]

--- 9.18.17 released ---

6206. [bug] Add shutdown checks in dns_catz_dbupdate_callback() to
avoid a race with dns_catz_shutdown_catzs(). [GL #4171]

6205. [bug] Restore support to read legacy HMAC-MD5 K file pairs.
[GL #4154]

6204. [bug] Use NS records for relaxed QNAME-minimization mode.
This reduces the number of queries named makes when
resolving, as it allows the non-existence of NS RRsets
at non-referral nodes to be cached in addition to the
referrals that are normally cached. [GL #3325]

6200. [bug] Fix nslookup erroneously reporting a timeout when the
input is delayed. [GL #4044]

6199. [bug] Improve HTTP Connection: header protocol conformance
in the statistics channel. [GL #4126]

6198. [func] Remove the holes in the isc_result_t enum to compact
the isc_result tables. [GL #4149]

6197. [bug] Fix a data race between the dns_zone and dns_catz
modules when registering/unregistering a database
update notification callback for a catalog zone.
[GL #4132]

6196. [cleanup] Report "permission denied" instead of "unexpected error"
when trying to update a zone file on a read-only file
system. Thanks to Midnight Veil. [GL #4134]

6193. [bug] Fix a catz db update notification callback registration
logic error, which could crash named when receiving an
AXFR update for a catalog zone while the previous update
process of the catalog zone was already running.
[GL #4136]

6166. [func] Retry without DNS COOKIE on FORMERR if it appears that
the FORMERR was due to the presence of a DNS COOKIE
option. [GL #4049]

Import bind-9.16.37 (previous was bind-9.16.33)

--- 9.16.37 released ---

6067. [security] Fix serve-stale crash when recursive clients soft quota
is reached. (CVE-2022-3924) [GL #3619]

6066. [security] Handle RRSIG lookups when serve-stale is active.
(CVE-2022-3736) [GL #3622]

6064. [security] An UPDATE message flood could cause named to exhaust all
available memory. This flaw was addressed by adding a
new "update-quota" statement that controls the number of
simultaneous UPDATE messages that can be processed or
forwarded. The default is 100. A stats counter has been
added to record events when the update quota is
exceeded, and the XML and JSON statistics version
numbers have been updated. (CVE-2022-3094) [GL #3523]

6062. [func] The DSCP implementation, which has only been
partly operational since 9.16.0, is now marked as
deprecated. Configuring DSCP values in named.conf
will cause a warning will be logged. [GL #3773]

6060. [bug] Fix a use-after-free bug in dns_zonemgr_releasezone()
by detaching from the zone manager outside of the write
lock. [GL #3768]

6059. [bug] In some serve stale scenarios, like when following an
expired CNAME record, named could return SERVFAIL if the
previous request wasn't successful. Consider non-stale
data when in serve-stale mode. [GL #3678]

6058. [bug] Prevent named from crashing when "rndc delzone"
attempts to delete a zone added by a catalog zone.
[GL #3745]

6050. [bug] Changes to the RPZ response-policy min-update-interval
and add-soa options now take effect as expected when
named is reconfigured. [GL #3740]

6048. [bug] Fix a log message error in dns_catz_update_from_db(),
where serials with values of 2^31 or larger were logged
incorrectly as negative numbers. [GL #3742]

6045. [cleanup] The list of supported DNSSEC algorithms changed log
level from "warning" to "notice" to match named's other
startup messages. [GL !7217]

6044. [bug] There was an "RSASHA236" typo in a log message.
[GL !7206]

--- 9.16.36 released ---

6043. [bug] The key file IO locks objects would never get
deleted from the hashtable due to off-by-one error.
[GL #3727]

6042. [bug] ANY responses could sometimes have the wrong TTL.
[GL #3613]

6040. [bug] Speed up the named shutdown time by explicitly
canceling all recursing ns_client objects for
each ns_clientmgr. [GL #3183]

6039. [bug] Removing a catalog zone from catalog-zones without
also removing the referenced zone could leave a
dangling pointer. [GL #3683]

6031. [bug] Move the "final reference detached" log message
from dns_zone unit to the DEBUG(1) log level.
[GL #3707]

6024. [func] Deprecate 'auto-dnssec'. [GL #3667]

6021. [bug] Use the current domain name when checking answers from
a dual-stack-server. [GL #3607]

6020. [bug] Ensure 'named-checkconf -z' respects the check-wildcard
option when loading a zone. [GL #1905]

6017. [bug] The view's zone table was not locked when it should
have been leading to race conditions when external
extensions that manipulate the zone table where in
use. [GL #3468]

--- 9.16.35 released ---

6013. [bug] Fix a crash that could happen when you change
a dnssec-policy zone with NSEC3 to start using
inline-signing. [GL #3591]

6009. [bug] Don't trust a placeholder KEYDATA from the managed-keys
zone by adding it into secroots. [GL #2895]

6008. [bug] Fixed a race condition that could cause a crash
in dns_zone_synckeyzone(). [GL #3617]

6002. [bug] Fix a resolver prefetch bug when the record's TTL value
is equal to the configured prefetch eligibility value,
but the record was erroneously not treated as eligible
for prefetching. [GL #3603]

6001. [bug] Always call dns_adb_endudpfetch() after calling
dns_adb_beginudpfetch() for UDP queries in resolver.c,
in order to adjust back the quota. [GL #3598]

6000. [bug] Fix a startup issue on Solaris systems with many
(reportedly > 510) CPUs. Thanks to Stacey Marshall from
Oracle for deep investigation of the problem. [GL #3563]

5999. [bug] rpz-ip rules could be ineffective in some scenarios
with CD=1 queries. [GL #3247]

5998. [bug] The RecursClients statistics counter could overflow
in certain resolution scenarios. [GL #3584]

5996. [bug] Fix a couple of bugs in cfg_print_duration(), which
could result in generating incomplete duration values
when printing the configuration using named-checkconf.
[GL !6880]

--- 9.16.34 released ---

5991. [protocol] Add support for parsing and validating "dohpath" to
SVCB. [GL #3544]

5988. [bug] Some out of memory conditions in opensslrsa_link.c
could lead to memory leaks. [GL #3551]

5984. [func] 'named -V' now reports the list of supported
DNSSEC/DS/HMAC algorithms and the supported TKEY modes.
[GL #3541]

5983. [bug] Changing just the TSIG key names for primaries in
catalog zones' member zones was not effective.
[GL #3557]

5973. [bug] Fixed a possible invalid detach in UPDATE
processing. [GL #3522]

5963. [bug] Ensure struct named_server is properly initialized.
[GL #6531]

5921. [test] Convert system tests to use a default DNSKEY algorithm
where the test is not DNSKEY algorithm specific.
[GL #3440]

branches: 1.1.1.4.2;
Import 9.16.33; last imported was 9.16.20

--- 9.16.33 released ---

5962. [security] Fix memory leak in EdDSA verify processing.
(CVE-2022-38178) [GL #3487]

5961. [security] Fix memory leak in ECDSA verify processing.
(CVE-2022-38177) [GL #3487]

5960. [security] Fix serve-stale crash that could happen when
stale-answer-client-timeout was set to 0 and there was
a stale CNAME in the cache for an incoming query.
(CVE-2022-3080) [GL #3517]

5957. [security] Prevent excessive resource use while processing large
delegations. (CVE-2022-2795) [GL #3394]

5956. [func] Make RRL code treat all QNAMEs that are subject to
wildcard processing within a given zone as the same
name. [GL #3459]

5955. [port] The libxml2 library has deprecated the usage of
xmlInitThreads() and xmlCleanupThreads() functions. Use
xmlInitParser() and xmlCleanupParser() instead.
[GL #3518]

5954. [func] Fallback to IDNA2003 processing in dig when IDNA2008
conversion fails. [GL #3485]

5953. [bug] Fix a crash on shutdown in delete_trace_entry(). Add
mctx attach/detach pair to make sure that the memory
context used by a memory pool is not destroyed before
the memory pool itself. [GL #3515]

5952. [bug] Use quotes around address strings in YAML output.
[GL #3511]

5951. [bug] In some cases, the dnstap query_message field was
erroneously set when logging response messages.
[GL #3501]

5948. [bug] Fix nsec3.c:dns_nsec3_activex() function, add a missing
dns_db_detachnode() call. [GL #3500]

5945. [bug] If parsing /etc/bind.key failed, delv could assert
when trying to parse the built in trust anchors as
the parser hadn't been reset. [GL !6468]

5942. [bug] Fix tkey.c:buildquery() function's error handling by
adding the missing cleanup code. [GL #3492]

5941. [func] Zones with dnssec-policy now require dynamic DNS or
inline-siging to be configured explicitly. [GL #3381]

5936. [bug] Don't enable serve-stale for lookups that error because
it is a duplicate query or a query that would be
dropped. [GL #2982]

--- 9.16.32 released ---

5934. [func] Improve fetches-per-zone fetch limit logging to log
the final allowed and spilled values of the fetch
counters before the counter object gets destroyed.
[GL #3461]

5933. [port] Automatically disable RSASHA1 and NSEC3RSASHA1 in
named on Fedorda 33, Oracle Linux 9 and RHEL9 when
they are disabled by the security policy. [GL #3469]

5932. [bug] Fix rndc dumpdb -expired and always include expired
RRsets, not just for RBTDB_VIRTUAL time window.
[GL #3462]

5929. [bug] The "max-zone-ttl" option in "dnssec-policy" was
not fully effective; it was used for timing key
rollovers but did not actually place an upper limit
on TTLs when loading a zone. This has been
corrected, and the documentation has been clarified
to indicate that the old "max-zone-ttl" zone option
is now ignored when "dnssec-policy" is in use.
[GL #2918]

5924. [func] When it's necessary to use AXFR to respond to an
IXFR request, a message explaining the reason
is now logged at level info. [GL #2683]

5923. [bug] Fix inheritance for dnssec-policy when checking for
inline-signing. [GL #3438]

5922. [bug] Forwarding of UPDATE message could fail with the
introduction of netmgr. This has been fixed. [GL #3389]

--- 9.16.31 released ---

5917. [bug] Update ifconfig.sh script as is miscomputed interface
identifiers when destroying interfaces. [GL #3061]

5915. [bug] Detect missing closing brace (}) and computational
overflows in $GENERATE directives. [GL #3429]

5913. [bug] Fix a race between resolver query timeout and
validation in resolver.c:validated(). Remove
resolver.c:maybe_destroy() as it is no loger needed.
[GL #3398]

5909. [bug] The server-side destination port was missing from dnstap
captures of client traffic. [GL #3309]

5905. [bug] When the TCP connection would be closed/reset between
the connect/accept and the read, the uv_read_start()
return value would be unexpected and cause an assertion
failure. [GL #3400]

5903. [bug] When named checks that the OPCODE in a response matches
that of the request, if there is a mismatch named logs
an error. Some of those error messages incorrectly
used RCODE instead of OPCODE to lookup the nemonic.
This has been corrected. [GL !6420]

--- 9.16.30 released ---

5899. [func] Don't try to process DNSSEC-related and ZONEMD records
in catz. [GL #3380]

5890. [bug] When the fetches-per-server quota was adjusted
because of an authoritative server timing out more
or less frequently, it was incorrectly set to 1
rather than the intended value. This has been
fixed. [GL #3327]

5888. [bug] Only write key files if the dnssec-policy keymgr has
changed the metadata. [GL #3302]

5823. [func] Replace hazard pointers based lock-free list with
locked-list based queue that's simpler and has no or
little performance impact. [GL #3180]

--- 9.16.29 released ---

5885. [bug] RPZ NSIP and NSDNAME rule processing didn't handle stub
and static-stub zones at or above the query name. This
has now been addressed. [GL #3232]

5881. [bug] dig +nssearch could hang in rare cases when recv_done()
callback was being called earlier than send_done().
[GL #3278]

5880. [func] Add new named command-line option -C to print built-in
defaults. [GL #1326]

5879. [contrib] dlz: Add FALLTHROUGH and UNREACHABLE macros. [GL #3306]

5874. [bug] keymgr didn't work with python 3.11. [GL !6157]

5866. [bug] Work around a jemalloc quirk which could trigger an
out-of-memory condition in named over time. [GL #3287]

5863. [bug] If there was a pending negative cache DS entry,
validations depending upon it could fail. [GL #3279]

5858. [bug] Don't remove CDS/CDNSKEY DELETE records on zone sign
when using 'auto-dnssec maintain;'. [GL #2931]

--- 9.16.28 released ---

5856. [bug] The "starting maxtime timer" message related to outgoing
zone transfers was incorrectly logged at the ERROR level
instead of DEBUG(1). [GL #3208]

5852. [func] Add new "reuseport" option to enable/disable load
balancing of sockets. [GL #3249]

5843. [bug] When an UPDATE targets a zone that is not configured,
the requested zone name is now logged in the "not
authoritative" error message, so that it is easier to
track down problematic update clients. [GL #3209]

5836. [bug] Quote the dns64 prefix in error messages that complain
about problems with it, to avoid confusion with the
following dns64 ACLs. [GL #3210]

5834. [cleanup] C99 variable-length arrays are difficult to use safely,
so avoid them except in test code. [GL #3201]

5828. [bug] Replace single TCP write timer with per-TCP write
timers. [GL #3200]

5824. [bug] Invalid dnssec-policy definitions were being accepted
where the defined keys did not cover both KSK and ZSK
roles for a given algorithm. This is now checked for
and the dnssec-policy is rejected if both roles are
not present for all algorithms in use. [GL #3142]

--- 9.16.27 released ---

5818. [security] A synchronous call to closehandle_cb() caused
isc__nm_process_sock_buffer() to be called recursively,
which in turn left TCP connections hanging in the
CLOSE_WAIT state blocking indefinitely when
out-of-order processing was disabled. (CVE-2022-0396)
[GL #3112]

5817. [security] The rules for acceptance of records into the cache
have been tightened to prevent the possibility of
poisoning if forwarders send records outside
the configured bailiwick. (CVE-2021-25220) [GL #2950]

5816. [bug] Make BIND compile with LibreSSL 3.5.0, as it was using
not very accurate pre-processor checks for using shims.
[GL #3172]

5815. [bug] If an oversized key name of a specific length was used
in the text form of an HTTP or SVBC record, an INSIST
could be triggered when parsing it. [GL #3175]

5814. [bug] The RecursClients statistics counter could underflow
in certain resolution scenarios. [GL #3147]

5811. [bug] Reimplement the maximum and idle timeouts for outgoing
zone transfers. [GL #1897]

5807. [bug] Add a TCP "write" timer, and time out writing
connections after the "tcp-idle-timeout" period
has elapsed. [GL #3132]

5804. [func] Add a debug log message when starting and ending
the task exclusive mode. [GL #3137]

--- 9.16.26 released ---

5801. [bug] Log "quota reached" message when hard quota
is reached when accepting a connection. [GL #3125]

5800. [func] Add ECS support to the DLZ interface. [GL #3082]

5797. [bug] A failed view configuration during a named
reconfiguration procedure could cause inconsistencies
in BIND internal structures, causing a crash or other
unexpected errors. [GL #3060]

5795. [bug] rndc could crash when interrupted by a signal
before receiving a response. [GL #3080]

5793. [bug] Correctly detect and enable UDP recvmmsg support
in all versions of libuv that support it. [GL #3095]

--- 9.16.25 released ---

5789. [bug] Allow replacing expired zone signatures with
signatures created by the KSK. [GL #3049]

5788. [bug] An assertion could occur if a catalog zone event was
scheduled while the task manager was being shut
down. [GL #3074]

5787. [doc] Update 'auto-dnssec' documentation, it may only be
activated at zone level. [GL #3023]

5786. [bug] Defer detaching from zone->raw in zone_shutdown() if
the zone is in the process of being dumped to disk, to
ensure that the unsigned serial number information is
always written in the raw-format header of the signed
version on an inline-signed zone. [GL #3071]

5785. [bug] named could leak memory when two dnssec-policy clauses
had the same name. named failed to log this error.
[GL #3085]

5776. [bug] Add a missing isc_condition_destroy() for nmsocket
condition variable and add missing isc_mutex_destroy()
for nmworker lock. [GL #3051]

5676. [func] Memory use in named was excessive. This has been
addressed by:
- Replacing locked memory pools with normal memory
allocations.
- Reducing the number of retained free items in
unlocked memory pools.
- Disabling the internal allocator by default.
"named -M internal" turns it back on.
[GL #2398]

--- 9.16.24 released ---

5773. [func] Change the message when accepting TCP connection has
failed to say "Accepting TCP connection failed" and
change the log level for ISC_R_NOTCONNECTED, ISC_R_QUOTA
and ISC_R_SOFTQUOTA results codes from ERROR to INFO.
[GL #2700]

5768. [bug] dnssec-dsfromkey failed to omit revoked keys. [GL #853]

5764. [bug] dns_sdlz_putrr failed to process some valid resource
records. [GL #3021]

5762. [bug] Fix a "named" crash related to removing and restoring a
`catalog-zone` entry in the configuration file and
running `rndc reconfig`. [GL #1608]

5758. [bug] mdig now honors the operating system's preferred
ephemeral port range. [GL #2374]

5757. [test] Replace sed in nsupdate system test with awk to
construct the nsupdate command. The sed expression
was not reliably changing the ttl. [GL #3003]

--- 9.16.23 released ---

5752. [bug] Fix an assertion failure caused by missing member zones
during a reload of a catalog zone. [GL #2308]

5750. [bug] Fix a bug when comparing two RSA keys. There was a typo
which caused the "p" prime factors to not being
compared. [GL #2972]

5737. [bug] Address Coverity warning in lib/dns/dnssec.c.
[GL #2935]

--- 9.16.22 released ---

5736. [security] The "lame-ttl" option is now forcibly set to 0. This
effectively disables the lame server cache, as it could
previously be abused by an attacker to significantly
degrade resolver performance. (CVE-2021-25219)
[GL #2899]

5724. [bug] Address a potential deadlock when checking zone content
consistency. [GL #2908]

5723. [bug] Change 5709 broke backward compatibility for the
"check-names master ..." and "check-names slave ..."
options. This has been fixed. [GL #2911]

5720. [contrib] Old-style DLZ drivers that had to be enabled at
build-time have been marked as deprecated. [GL #2814]

5719. [func] The "map" zone file format has been marked as
deprecated. [GL #2882]

5717. [func] The "cache-file" option, which was documented as "for
testing purposes only" and not to be used, has been
removed. [GL #2903]

5716. [bug] Multiple library names were mistakenly passed to the
krb5-config utility when ./configure was invoked with
the --with-gssapi=[/path/to/]krb5-config option. This
has been fixed by invoking krb5-config separately for
each required library. [GL #2866]

5715. [func] Add a check for ports specified in "*-source(-v6)"
options clashing with a global listening port. Such a
configuration was already unsupported, but it failed
silently; it is now treated as an error. [GL #2888]

5714. [bug] Remove the "adjust interface" mechanism which was
responsible for setting up listeners on interfaces when
the "*-source(-v6)" address and port were the same as
the "listen-on(-v6)" address and port. Such a
configuration is no longer supported; under certain
timing conditions, that mechanism could prevent named
from listening on some TCP ports. This has been fixed.
[GL #2852]

5712. [doc] Add deprecation notice about removing native PKCS#11
support in the next major BIND 9 release. [GL #2691]

--- 9.16.21 released ---

5711. [bug] "map" files exceeding 2GB in size failed to load due to
a size comparison that incorrectly treated the file size
as a signed integer. [GL #2878]

5710. [port] win32: incorrect parentheses resulted in the wrong
sizeof() tests being used to pick the appropriate
Windows atomic operations for the object's size.
[GL #2891]

5709. [cleanup] Enum values throughout the code have been updated
to use the terms "primary" and "secondary" instead of
"master" and "slave", respectively. [GL #1944]

5708. [bug] The thread-local isc_tid_v variable was not properly
initialized when running BIND 9 as a Windows Service,
leading to a crash on startup. [GL #2837]

5705. [bug] Change #5686 altered the internal memory structure of
zone databases, but neglected to update the MAPAPI value
for zone files in "map" format. This caused named to
attempt to load incompatible map files, triggering an
assertion failure on startup. The MAPAPI value has now
been updated, so named rejects outdated files when
encountering them. [GL #2872]

5704. [bug] Change #5317 caused the EDNS TCP Keepalive option to be
ignored inadvertently in client requests. It has now
been fixed and this option is handled properly again.
[GL #1927]

5701. [bug] named-checkconf failed to detect syntactically invalid
values of the "key" and "tls" parameters used to define
members of remote server lists. [GL #2461]

5700. [bug] When a member zone was removed from a catalog zone,
journal files for the former were not deleted.
[GL #2842]

5699. [func] Data structures holding DNSSEC signing statistics are
now grown and shrunk as necessary upon key rollover
events. [GL #1721]

5698. [bug] When a DNSSEC-signed zone which only has a single
signing key available is migrated to use KASP, that key
is now treated as a Combined Signing Key (CSK).
[GL #2857]

5696. [protocol] Support for HTTPS and SVCB record types has been added.
(This does not include ADDITIONAL section processing for
these record types, only basic support for RR type
parsing and printing.) [GL #1132]

5694. [bug] Stale data in the cache could cause named to send
non-minimized queries despite QNAME minimization being
enabled. [GL #2665]

5691. [bug] When a dynamic zone was made available in another view
using the "in-view" statement, running "rndc freeze"
always reported an "already frozen" error even though
the zone was successfully frozen. [GL #2844]

5690. [func] dnssec-signzone now honors Predecessor and Successor
metadata found in private key files: if a signature for
an RRset generated by the inactive predecessor exists
and does not need to be replaced, no additional
signature is now created for that RRset using the
successor key. This enables dnssec-signzone to gradually
replace RRSIGs during a ZSK rollover. [GL #1551]

Import bind-9.16.20

--- 9.16.20 released ---

5689. [security] An assertion failure occurred when named attempted to
send a UDP packet that exceeded the MTU size, if
Response Rate Limiting (RRL) was enabled.
(CVE-2021-25218) [GL #2856]

5688. [bug] Zones using KASP and inline-signed zones failed to apply
changes from the unsigned zone to the signed zone under
certain circumstances. This has been fixed. [GL #2735]

5687. [bug] "rndc reload <zonename>" could trigger a redundant
reload for an inline-signed zone whose zone file was not
modified since the last "rndc reload". This has been
fixed. [GL #2855]

5686. [func] The number of internal data structures allocated for
each zone was reduced. [GL #2829]

5685. [bug] named failed to check the opcode of responses when
performing zone refreshes, stub zone updates, and UPDATE
forwarding. This has been fixed. [GL #2762]

5682. [bug] Some changes to "zone-statistics" settings were not
properly processed by "rndc reconfig". This has been
fixed. [GL #2820]

5681. [func] Relax the checks in the dns_zone_cdscheck() function to
allow CDS and CDNSKEY records in the zone that do not
match an existing DNSKEY record, as long as the
algorithm matches. This allows a clean rollover from one
provider to another in a multi-signer DNSSEC
configuration. [GL #2710]

5679. [func] Thread affinity is no longer set. [GL #2822]

5678. [bug] The "check DS" code failed to release all resources upon
named shutdown when a refresh was in progress. This has
been fixed. [GL #2811]

5672. [bug] Authentication of rndc messages could fail if a
"controls" statement was configured with multiple key
algorithms for the same listener. This has been fixed.
[GL #2756]

--- 9.16.19 released ---

5671. [bug] A race condition could occur where two threads were
competing for the same set of key file locks, leading to
a deadlock. This has been fixed. [GL #2786]

5670. [bug] create_keydata() created an invalid placeholder keydata
record upon a refresh failure, which prevented the
database of managed keys from subsequently being read
back. This has been fixed. [GL #2686]

5669. [func] KASP support was extended with the "check DS" feature.
Zones with "dnssec-policy" and "parental-agents"
configured now check for DS presence and can perform
automatic KSK rollovers. [GL #1126]

5668. [bug] Rescheduling a setnsec3param() task when a zone failed
to load on startup caused a hang on shutdown. This has
been fixed. [GL #2791]

5667. [bug] The configuration-checking code failed to account for
the inheritance rules of the "dnssec-policy" option.
This has been fixed. [GL #2780]

5666. [doc] The safe "edns-udp-size" value was tweaked to match the
probing value from BIND 9.16 for better compatibility.
[GL #2183]

5665. [bug] If nsupdate sends an SOA request and receives a REFUSED
response, it now fails over to the next available
server. [GL #2758]

5664. [func] For UDP messages larger than the path MTU, named now
sends an empty response with the TC (TrunCated) bit set.
In addition, setting the DF (Don't Fragment) flag on
outgoing UDP sockets was re-enabled. [GL #2790]

5662. [bug] Views with recursion disabled are now configured with a
default cache size of 2 MB unless "max-cache-size" is
explicitly set. This prevents cache RBT hash tables from
being needlessly preallocated for such views. [GL #2777]

5661. [bug] Change 5644 inadvertently introduced a deadlock: when
locking the key file mutex for each zone structure in a
different view, the "in-view" logic was not considered.
This has been fixed. [GL #2783]

5658. [bug] Increasing "max-cache-size" for a running named instance
(using "rndc reconfig") did not cause the hash tables
used by cache databases to be grown accordingly. This
has been fixed. [GL #2770]

5655. [bug] Signed, insecure delegation responses prepared by named
either lacked the necessary NSEC records or contained
duplicate NSEC records when both wildcard expansion and
CNAME chaining were required to prepare the response.
This has been fixed. [GL #2759]

5653. [bug] A bug that caused the NSEC3 salt to be changed on every
restart for zones using KASP has been fixed. [GL #2725]

--- 9.16.18 released ---

5660. [bug] The configuration-checking code failed to account for
the inheritance rules of the "key-directory" option.
[GL #2778]

5659. [bug] When preparing DNS responses, named could replace the
letters 'W' (uppercase) and 'w' (lowercase) with '\000'.
This has been fixed. [GL #2779]

--- 9.16.17 released ---

5652. [bug] A copy-and-paste error in change 5584 caused the
IP_DONTFRAG socket option to be enabled instead of
disabled. This has been fixed. [GL #2746]

5651. [func] Refactor zone dumping to be processed asynchronously via
the uv_work_t thread pool API. [GL #2732]

5650. [bug] Prevent a crash that could occur if serve-stale was
enabled and a prefetch was triggered during a query
restart. [GL #2733]

5649. [bug] If a query was answered with stale data on a server with
DNS64 enabled, an assertion could occur if a non-stale
answer arrived afterward. [GL #2731]

5648. [bug] The calculation of the estimated IXFR transaction size
in dns_journal_iter_init() was invalid. [GL #2685]

5644. [bug] Fix a race condition in reading and writing key files
for zones using KASP and configured in multiple views.
[GL #1875]

5643. [cleanup] "make install" no longer creates an empty
${localstatedir}/run directory. [GL #2709]

5642. [bug] Zones which are configured in multiple views with
different values set for "dnssec-policy" and with
identical values set for "key-directory" are now
detected and treated as a configuration error.
[GL #2463]

5641. [bug] Address a potential memory leak in
dst_key_fromnamedfile(). [GL #2689]

5639. [bug] Check that the first and last SOA record of an AXFR are
consistent. [GL #2528]

5638. [bug] Improvements related to network manager/task manager
integration:
- isc_managers_create() and isc_managers_destroy()
functions were added to handle setup and teardown of
netmgr, taskmgr, timermgr, and socketmgr, since these
require a precise order of operations now.
- Event queue processing is now quantized to prevent
infinite looping.
- The netmgr can now be paused from within a netmgr
thread.
- Deadlocks due to a conflict between netmgr's
pause/resume and listen/stoplistening operations were
fixed.
[GL #2654]

5633. [doc] The "inline-signing" option was incorrectly described as
being inherited from the "options"/"view" levels and was
incorrectly accepted at those levels without effect.
This has been fixed. [GL #2536]

5624. [func] Task manager events are now processed inside network
manager loops. The task manager no longer needs its own
set of worker threads, which improves resolver
performance. [GL #2638]

--- 9.16.16 released ---

5637. [func] Change the default value of the "max-ixfr-ratio" option
to "unlimited". [GL #2671]

5636. [bug] named and named-checkconf did not report an error when
multiple zones with the "dnssec-policy" option set were
using the same zone file. This has been fixed.
[GL #2603]

5635. [bug] Journal compaction could fail when a journal with
invalid transaction headers was not detected at startup.
This has been fixed. [GL #2670]

5634. [bug] If "dnssec-policy" was active and a private key file was
temporarily offline during a rekey event, named could
incorrectly introduce replacement keys and break a
signed zone. This has been fixed. [GL #2596]

5633. [doc] The "inline-signing" option was incorrectly described as
being inherited from the "options"/"view" levels and was
incorrectly accepted at those levels without effect.
This has been fixed. [GL #2536]

5632. [func] Add a new built-in KASP, "insecure", which is used to
transition a zone from a signed to an unsigned state.
The existing built-in KASP "none" should no longer be
used to unsign a zone. [GL #2645]

5631. [protocol] Update the implementation of the ZONEMD RR type to match
RFC 8976. [GL #2658]

5630. [func] Treat DNSSEC responses containing NSEC3 records with
iteration counts greater than 150 as insecure.
[GL #2445]

5629. [func] Reduce the maximum supported number of NSEC3 iterations
that can be configured for a zone to 150. [GL #2642]

5627. [bug] RRSIG(SOA) RRsets placed anywhere other than at the zone
apex were triggering infinite resigning loops. This has
been fixed. [GL #2650]

5626. [bug] When generating zone signing keys, KASP now also checks
for key ID conflicts among newly created keys, rather
than just between new and existing ones. [GL #2628]

5625. [bug] A deadlock could occur when multiple "rndc addzone",
"rndc delzone", and/or "rndc modzone" commands were
invoked simultaneously for different zones. This has
been fixed. [GL #2626]

5622. [cleanup] The lib/samples/ directory has been removed, as export
versions of libraries are no longer maintained.
[GL !4835]

5619. [protocol] Implement draft-vandijk-dnsop-nsec-ttl, updating the
protocol such that NSEC(3) TTL values are set to the
minimum of the SOA MINIMUM value or the SOA TTL.
[GL #2347]

5618. [bug] Change 5149 introduced some inconsistencies in the way
record TTLs were presented in cache dumps. These
inconsistencies have been eliminated. [GL #389]
[GL #2289]

--- 9.16.12 released ---

5578. [protocol] Make "check-names" accept A records below "_spf",
"_spf_rate", and "_spf_verify" labels in order to cater
for the "exists" SPF mechanism specified in RFC 7208
section 5.7 and appendix D.1. [GL #2377]

5577. [bug] Fix the "three is a crowd" key rollover bug in KASP by
correctly implementing Equation (2) of the "Flexible and
Robust Key Rollover" paper. [GL #2375]

5575. [bug] When migrating to KASP, BIND 9 considered keys with the
"Inactive" and/or "Delete" timing metadata to be
possible active keys. This has been fixed. [GL #2406]

5572. [bug] Address potential double free in generatexml().
[GL #2420]

5571. [bug] named failed to start when its configuration included a
zone with a non-builtin "allow-update" ACL attached.
[GL #2413]

5570. [bug] Improve performance of the DNSSEC verification code by
reducing the number of repeated calls to
dns_dnssec_keyfromrdata(). [GL #2073]

5569. [bug] Emit useful error message when "rndc retransfer" is
applied to a zone of inappropriate type. [GL #2342]

5568. [bug] Fixed a crash in "dnssec-keyfromlabel" when using ECDSA
keys. [GL #2178]

5567. [bug] Dig now reports unknown dash options while pre-parsing
the options. This prevents "-multi" instead of "+multi"
from reporting memory usage before ending option parsing
with "Invalid option: -lti". [GL #2403]

5566. [func] Add "stale-answer-client-timeout" option, which is the
amount of time a recursive resolver waits before
attempting to answer the query using stale data from
cache. [GL #2247]

5565. [func] The SONAMEs for BIND 9 libraries now include the current
BIND 9 version number, in an effort to tightly couple
internal libraries with a specific release. [GL #2387]

5562. [security] Fix off-by-one bug in ISC SPNEGO implementation.
(CVE-2020-8625) [GL #2354]

5561. [bug] KASP incorrectly set signature validity to the value of
the DNSKEY signature validity. This is now fixed.
[GL #2383]

5560. [func] The default value of "max-stale-ttl" has been changed
from 12 hours to 1 day and the default value of
"stale-answer-ttl" has been changed from 1 second to 30
seconds, following RFC 8767 recommendations. [GL #2248]

5456. [func] Added "primaries" as a synonym for "masters" in
named.conf, and "primary-only" as a synonym for
"master-only" in the parameters to "notify", to bring
terminology up-to-date with RFC 8499. [GL #1948]

5362. [func] Limit the size of IXFR responses so that AXFR will
be used instead if it would be smaller. This is
controlled by the "max-ixfr-ratio" option, which
is a percentage representing the ratio of IXFR size
to the size of the entire zone. This value cannot
exceed 100%, which is the default. [GL #1515]

--- 9.16.11 released ---

5559. [bug] The --with-maxminddb=PATH form of the build-time option
enabling support for libmaxminddb was not working
correctly. This has been fixed. [GL #2366]

5557. [bug] Prevent RBTDB instances from being destroyed by multiple
threads at the same time. [GL #2317]

5556. [bug] Further tweak newline printing in dnssec-signzone and
dnssec-verify. [GL #2359]

5555. [bug] server->reload_status was not properly initialized.
[GL #2361]

5554. [bug] dnssec-signzone and dnssec-verify were missing newlines
between log messages. [GL #2359]

5553. [bug] When reconfiguring named, removing "auto-dnssec" did not
turn off DNSSEC maintenance. [GL #2341]

5552. [func] When switching to "dnssec-policy none;", named now
permits a safe transition to insecure mode and publishes
the CDS and CDNSKEY DELETE records, as described in RFC
8078. [GL #1750]

5551. [bug] named no longer attempts to assign threads to CPUs
outside the CPU affinity set. Thanks to Ole Bj��rn
Hessen. [GL #2245]

5550. [func] dnssec-signzone and named now log a warning when falling
back to the "increment" SOA serial method. [GL #2058]

5545. [func] OS support for load-balanced sockets is no longer
required to receive incoming queries in multiple netmgr
threads. [GL #2137]

5543. [bug] Fix UDP performance issues caused by making netmgr
callbacks asynchronous-only. [GL #2320]

5542. [bug] Refactor netmgr. [GL #1920] [GL #2034] [GL #2061]
[GL #2194] [GL #2221] [GL #2266] [GL #2283] [GL #2318]
[GL #2321]

--- 9.16.10 released ---

5544. [func] Restore the default value of "nocookie-udp-size" to 4096
bytes. [GL #2250]

5541. [func] Adjust the "max-recursion-queries" default from 75 to
100. [GL #2305]

5540. [port] Fix building with native PKCS#11 support for AEP Keyper.
[GL #2315]

5539. [bug] Tighten handling of missing DNS COOKIE responses over
UDP by falling back to TCP. [GL #2275]

5538. [func] Add NSEC3 support to KASP. A new option for
"dnssec-policy", "nsec3param", can be used to set the
desired NSEC3 parameters. NSEC3 salt collisions are
automatically prevented during resalting. Salt
generation is now logged with zone context. [GL #1620]

5534. [bug] The CNAME synthesized from a DNAME was incorrectly
followed when the QTYPE was CNAME or ANY. [GL #2280]

--- 9.16.9 released ---

5533. [func] Add the "stale-refresh-time" option, a time window that
starts after a failed lookup, during which a stale RRset
is served directly from cache before a new attempt to
refresh it is made. [GL #2066]

5530. [bug] dnstap did not capture responses to forwarded UPDATE
requests. [GL #2252]

5527. [bug] A NULL pointer dereference occurred when creating an NTA
recheck query failed. [GL #2244]

5525. [bug] Change 5503 inadvertently broke cross-compilation by
replacing a call to AC_LINK_IFELSE() with a call to
AC_RUN_IFELSE() in configure.ac. This has been fixed,
making cross-compilation possible again. [GL #2237]

5523. [bug] The initial lookup in a zone transitioning to/from a
signed state could fail if the DNSKEY RRset was not
found. [GL #2236]

5522. [bug] Fixed a race/NULL dereference in TCPDNS send. [GL #2227]

5520. [bug] Fixed a number of shutdown races, reference counting
errors, and spurious log messages that could occur
in the network manager. [GL #2221]

5518. [bug] Stub zones now work correctly with primary servers using
"minimal-responses yes". [GL #1736]

5517. [bug] Do not treat UV_EOF as a TCP4RecvErr or a TCP6RecvErr.
[GL #2208]

--- 9.16.8 released ---

5516. [func] The default EDNS buffer size has been changed from 4096
to 1232 bytes. [GL #2183]

5515. [func] Add 'rndc dnssec -rollover' command to trigger a manual
rollover for a specific key. [GL #1749]

5514. [bug] Fix KASP expected key size for Ed25519 and Ed448.
[GL #2171]

5513. [doc] The ARM section describing the "rrset-order" statement
was rewritten to make it unambiguous and up-to-date with
the source code. [GL #2139]

5512. [bug] "rrset-order" rules using "order none" were causing
named to crash despite named-checkconf treating them as
valid. [GL #2139]

5511. [bug] 'dig -u +yaml' failed to display timestamps to the
microsecond. [GL #2190]

5510. [bug] Implement the attach/detach semantics for dns_message_t
to fix a data race in accessing an already-destroyed
fctx->rmessage. [GL #2124]

5509. [bug] filter-aaaa: named crashed upon shutdown if it was in
the process of recursing for A RRsets. [GL #1040]

5508. [func] Added new parameter "-expired" for "rndc dumpdb" that
also prints expired RRsets (awaiting cleanup) to the
dump file. [GL #1870]

5507. [bug] Named could compute incorrect SIG(0) responses.
[GL #2109]

5506. [bug] Properly handle failed sysconf() calls, so we don't
report invalid memory size. [GL #2166]

5505. [bug] Updating contents of a mixed-case RPZ could cause some
rules to be ignored. [GL #2169]

5503. [bug] Cleaned up reference counting of network manager
handles, now using isc_nmhandle_attach() and _detach()
instead of _ref() and _unref(). [GL #2122]

--- 9.16.7 released ---

5501. [func] Log CDS/CDNSKEY publication. [GL #1748]

5500. [bug] Fix (non-)publication of CDS and CDNSKEY records.
[GL #2103]

5499. [func] Add '-P ds' and '-D ds' arguments to dnssec-settime.
[GL #1748]

5497. [bug] 'dig +bufsize=0' failed to disable EDNS. [GL #2054]

5496. [bug] Address a TSAN report by ensuring each rate limiter
object holds a reference to its task. [GL #2081]

5495. [bug] With query minimization enabled, named failed to
resolve ip6.arpa. names that had extra labels to the
left of the IPv6 part. [GL #1847]

5494. [bug] Silence the EPROTO syslog message on older systems.
[GL #1928]

5493. [bug] Fix off-by-one error when calculating new hash table
size. [GL #2104]

5492. [bug] Tighten LOC parsing to reject a period (".") and/or "m"
as a value. Fix handling of negative altitudes which are
not whole meters. [GL #2074]

5491. [bug] rbtversion->glue_table_size could be read without the
appropriate lock being held. [GL #2080]

5489. [bug] Named erroneously accepted certain invalid resource
records that were incorrectly processed after
subsequently being written to disk and loaded back, as
the wire format differed. Such records include: CERT,
IPSECKEY, NSEC3, NSEC3PARAM, NXT, SIG, TLSA, WKS, and
X25. [GL !3953]

5488. [bug] NTA code needed to have a weak reference on its
associated view to prevent the latter from being deleted
while NTA tests were being performed. [GL #2067]

5486. [func] Add 'rndc dnssec -checkds' command, which signals to
named that the DS record for a given zone or key has
been updated in the parent zone. [GL #1613]

--- 9.16.6 released ---

5484. [func] Expire zero TTL records quickly rather than using them
for stale answers. [GL #1829]

5483. [func] A new configuration option "stale-cache-enable" has been
introduced to enable or disable keeping stale answers in
cache. [GL #1712]

5482. [bug] If the Duplicate Address Detection (DAD) mechanism had
not yet finished after adding a new IPv6 address to the
system, BIND 9 would fail to bind to IPv6 addresses in a
tentative state. [GL #2038]

5481. [security] "update-policy" rules of type "subdomain" were
incorrectly treated as "zonesub" rules, which allowed
keys used in "subdomain" rules to update names outside
of the specified subdomains. The problem was fixed by
making sure "subdomain" rules are again processed as
described in the ARM. (CVE-2020-8624) [GL #2055]

5480. [security] When BIND 9 was compiled with native PKCS#11 support, it
was possible to trigger an assertion failure in code
determining the number of bits in the PKCS#11 RSA public
key with a specially crafted packet. (CVE-2020-8623)
[GL #2037]

5479. [security] named could crash in certain query resolution scenarios
where QNAME minimization and forwarding were both
enabled. (CVE-2020-8621) [GL #1997]

5478. [security] It was possible to trigger an assertion failure by
sending a specially crafted large TCP DNS message.
(CVE-2020-8620) [GL #1996]

5477. [bug] The idle timeout for connected TCP sockets, which was
previously set to a high fixed value, is now derived
from the client query processing timeout configured for
a resolver. [GL #2024]

5476. [security] It was possible to trigger an assertion failure when
verifying the response to a TSIG-signed request.
(CVE-2020-8622) [GL #2028]

5475. [bug] Wildcard RPZ passthru rules could incorrectly be
overridden by other rules that were loaded from RPZ
zones which appeared later in the "response-policy"
statement. This has been fixed. [GL #1619]

5474. [bug] dns_rdata_hip_next() failed to return ISC_R_NOMORE
when it should have. [GL !3880]

5473. [func] The RBT hash table implementation has been changed
to use a faster hash function (HalfSipHash2-4) and
Fibonacci hashing for better distribution. Setting
"max-cache-size" now preallocates a fixed-size hash
table so that rehashing does not cause resolution
brownouts while the hash table is grown. [GL #1775]

5471. [bug] The introduction of KASP support inadvertently caused
the second field of "sig-validity-interval" to always be
calculated in hours, even in cases when it should have
been calculated in days. This has been fixed. (Thanks to
Tony Finch.) [GL !3735]

5469. [port] On illumos, a constant called SEC is already defined in
<sys/time.h>, which conflicts with an identically named
constant in libbind9. This conflict has been resolved.
[GL #1993]

5468. [bug] Addressed potential double unlock in process_fd().
[GL #2005]

5466. [bug] Addressed an error in recursive clients stats reporting.
[GL #1719]

5465. [func] Added fallback to built-in trust-anchors, managed-keys,
or trusted-keys if the bindkeys-file (bind.keys) cannot
be parsed. [GL #1235]

5464. [bug] Requesting more than 128 files to be saved when rolling
dnstap log files caused a buffer overflow. This has been
fixed. [GL #1989]

5462. [bug] Move LMDB locking from LMDB itself to named. [GL #1976]

5461. [bug] The STALE rdataset header attribute was updated while
the write lock was not being held, leading to incorrect
statistics. The header attributes are now converted to
use atomic operations. [GL #1475]

--- 9.16.5 released ---

5458. [bug] Prevent a theoretically possible NULL dereference caused
by a data race between zone_maintenance() and
dns_zone_setview_helper(). [GL #1627]

5455. [bug] named could crash when cleaning dead nodes in
lib/dns/rbtdb.c that were being reused. [GL #1968]

5454. [bug] Address a startup crash that occurred when the server
was under load and the root zone had not yet been
loaded. [GL #1862]

5453. [bug] named crashed on shutdown when a new rndc connection was
received during shutdown. [GL #1747]

5452. [bug] The "blackhole" ACL was accidentally disabled for client
queries. [GL #1936]

5451. [func] Add 'rndc dnssec -status' command. [GL #1612]

5449. [bug] Fix a socket shutdown race in netmgr udp. [GL #1938]

5448. [bug] Fix a race condition in isc__nm_tcpdns_send().
[GL #1937]

5447. [bug] IPv6 addresses ending in "::" could break YAML
parsing. A "0" is now appended to such addresses
in YAML output from dig, mdig, delv, and dnstap-read.
[GL #1952]

5446. [bug] The validator could fail to accept a properly signed
RRset if an unsupported algorithm appeared earlier in
the DNSKEY RRset than a supported algorithm. It could
also stop if it detected a malformed public key.
[GL #1689]

5444. [bug] 'rndc dnstap -roll <value>' did not limit the number of
saved files to <value>. [GL !3728]

5443. [bug] The "primary" and "secondary" keywords, when used
as parameters for "check-names", were not
processed correctly and were being ignored. [GL #1949]

5441. [bug] ${LMDB_CFLAGS} was missing from make/includes.in.
[GL #1955]

5440. [test] Properly handle missing kyua. [GL #1950]

5439. [bug] The DS RRset returned by dns_keynode_dsset() was used in
a non-thread-safe manner. [GL #1926]

--- 9.16.4 released ---

5438. [bug] Fix a race in TCP accepting code. [GL #1930]

5437. [bug] Fix a data race in lib/dns/resolver.c:log_formerr().
[GL #1808]

5436. [security] It was possible to trigger an INSIST when determining
whether a record would fit into a TCP message buffer.
(CVE-2020-8618) [GL #1850]

5435. [tests] Add RFC 4592 responses examples to the wildcard system
test. [GL #1718]

5434. [security] It was possible to trigger an INSIST in
lib/dns/rbtdb.c:new_reference() with a particular zone
content and query patterns. (CVE-2020-8619) [GL #1111]
[GL #1718]

5431. [func] Reject DS records at the zone apex when loading
master files. Log but otherwise ignore attempts to
add DS records at the zone apex via UPDATE. [GL #1798]

5430. [doc] Update docs - with netmgr, a separate listening socket
is created for each IPv6 interface (just as with IPv4).
[GL #1782]

5428. [bug] Clean up GSSAPI resources in nsupdate only after taskmgr
has been destroyed. Thanks to Petr Men����k. [GL !3316]

5426. [bug] Don't abort() when setting SO_INCOMING_CPU on the socket
fails. [GL #1911]

5425. [func] The default value of "max-stale-ttl" has been changed
from 1 week to 12 hours. [GL #1877]

5424. [bug] With KASP, when creating a successor key, the "goal"
state of the current active key (predecessor) was not
changed and thus never removed from the zone. [GL #1846]

5423. [bug] Fix a bug in keymgr_key_has_successor(): it incorrectly
returned true if any other key in the keyring had a
successor. [GL #1845]

5422. [bug] When using dnssec-policy, print correct key timing
metadata. [GL #1843]

5421. [bug] Fix a race that could cause named to crash when looking
up the nodename of an RBT node if the tree was modified.
[GL #1857]

5420. [bug] Add missing isc_{mutex,conditional}_destroy() calls
that caused a memory leak on FreeBSD. [GL #1893]

5418. [bug] delv failed to parse deprecated trusted-keys-style
trust anchors. [GL #1860]

5416. [bug] Fix a lock order inversion in lib/isc/unix/socket.c.
[GL #1859]

5415. [test] Address race in dnssec system test that led to
test failures. [GL #1852]

5414. [test] Adjust time allowed for journal truncation to occur
in nsupdate system test to avoid test failure.
[GL #1855]

5413. [test] Address race in autosign system test that led to
test failures. [GL #1852]

5412. [bug] 'provide-ixfr no;' failed to return up-to-date responses
when the serial was greater than or equal to the
current serial. [GL #1714]

5411. [cleanup] TCP accept code has been refactored to use a single
accept() and pass the accepted socket to child threads
for processing. [GL !3320]

5409. [performance] When looking up NSEC3 data in a zone database, skip the
check for empty non-terminal nodes; the NSEC3 tree does
not have any. [GL #1834]

5408. [protocol] Print Extended DNS Errors if present in OPT record.
[GL #1835]

5407. [func] Zone timers are now exported via statistics channel.
Thanks to Paul Frieden, Verizon Media. [GL #1232]

5405. [bug] 'named-checkconf -p' could include spurious text in
server-addresses statements due to an uninitialized DSCP
value. [GL #1812]

Import bind-9.16.37 (previous was bind-9.16.33)

--- 9.16.37 released ---

6067. [security] Fix serve-stale crash when recursive clients soft quota
is reached. (CVE-2022-3924) [GL #3619]

6066. [security] Handle RRSIG lookups when serve-stale is active.
(CVE-2022-3736) [GL #3622]

6064. [security] An UPDATE message flood could cause named to exhaust all
available memory. This flaw was addressed by adding a
new "update-quota" statement that controls the number of
simultaneous UPDATE messages that can be processed or
forwarded. The default is 100. A stats counter has been
added to record events when the update quota is
exceeded, and the XML and JSON statistics version
numbers have been updated. (CVE-2022-3094) [GL #3523]

6062. [func] The DSCP implementation, which has only been
partly operational since 9.16.0, is now marked as
deprecated. Configuring DSCP values in named.conf
will cause a warning will be logged. [GL #3773]

6060. [bug] Fix a use-after-free bug in dns_zonemgr_releasezone()
by detaching from the zone manager outside of the write
lock. [GL #3768]

6059. [bug] In some serve stale scenarios, like when following an
expired CNAME record, named could return SERVFAIL if the
previous request wasn't successful. Consider non-stale
data when in serve-stale mode. [GL #3678]

6058. [bug] Prevent named from crashing when "rndc delzone"
attempts to delete a zone added by a catalog zone.
[GL #3745]

6050. [bug] Changes to the RPZ response-policy min-update-interval
and add-soa options now take effect as expected when
named is reconfigured. [GL #3740]

6048. [bug] Fix a log message error in dns_catz_update_from_db(),
where serials with values of 2^31 or larger were logged
incorrectly as negative numbers. [GL #3742]

6045. [cleanup] The list of supported DNSSEC algorithms changed log
level from "warning" to "notice" to match named's other
startup messages. [GL !7217]

6044. [bug] There was an "RSASHA236" typo in a log message.
[GL !7206]

--- 9.16.36 released ---

6043. [bug] The key file IO locks objects would never get
deleted from the hashtable due to off-by-one error.
[GL #3727]

6042. [bug] ANY responses could sometimes have the wrong TTL.
[GL #3613]

6040. [bug] Speed up the named shutdown time by explicitly
canceling all recursing ns_client objects for
each ns_clientmgr. [GL #3183]

6039. [bug] Removing a catalog zone from catalog-zones without
also removing the referenced zone could leave a
dangling pointer. [GL #3683]

6031. [bug] Move the "final reference detached" log message
from dns_zone unit to the DEBUG(1) log level.
[GL #3707]

6024. [func] Deprecate 'auto-dnssec'. [GL #3667]

6021. [bug] Use the current domain name when checking answers from
a dual-stack-server. [GL #3607]

6020. [bug] Ensure 'named-checkconf -z' respects the check-wildcard
option when loading a zone. [GL #1905]

6017. [bug] The view's zone table was not locked when it should
have been leading to race conditions when external
extensions that manipulate the zone table where in
use. [GL #3468]

--- 9.16.35 released ---

6013. [bug] Fix a crash that could happen when you change
a dnssec-policy zone with NSEC3 to start using
inline-signing. [GL #3591]

6009. [bug] Don't trust a placeholder KEYDATA from the managed-keys
zone by adding it into secroots. [GL #2895]

6008. [bug] Fixed a race condition that could cause a crash
in dns_zone_synckeyzone(). [GL #3617]

6002. [bug] Fix a resolver prefetch bug when the record's TTL value
is equal to the configured prefetch eligibility value,
but the record was erroneously not treated as eligible
for prefetching. [GL #3603]

6001. [bug] Always call dns_adb_endudpfetch() after calling
dns_adb_beginudpfetch() for UDP queries in resolver.c,
in order to adjust back the quota. [GL #3598]

6000. [bug] Fix a startup issue on Solaris systems with many
(reportedly > 510) CPUs. Thanks to Stacey Marshall from
Oracle for deep investigation of the problem. [GL #3563]

5999. [bug] rpz-ip rules could be ineffective in some scenarios
with CD=1 queries. [GL #3247]

5998. [bug] The RecursClients statistics counter could overflow
in certain resolution scenarios. [GL #3584]

5996. [bug] Fix a couple of bugs in cfg_print_duration(), which
could result in generating incomplete duration values
when printing the configuration using named-checkconf.
[GL !6880]

--- 9.16.34 released ---

5991. [protocol] Add support for parsing and validating "dohpath" to
SVCB. [GL #3544]

5988. [bug] Some out of memory conditions in opensslrsa_link.c
could lead to memory leaks. [GL #3551]

5984. [func] 'named -V' now reports the list of supported
DNSSEC/DS/HMAC algorithms and the supported TKEY modes.
[GL #3541]

5983. [bug] Changing just the TSIG key names for primaries in
catalog zones' member zones was not effective.
[GL #3557]

5973. [bug] Fixed a possible invalid detach in UPDATE
processing. [GL #3522]

5963. [bug] Ensure struct named_server is properly initialized.
[GL #6531]

5921. [test] Convert system tests to use a default DNSKEY algorithm
where the test is not DNSKEY algorithm specific.
[GL #3440]

Import 9.16.33; last imported was 9.16.20

--- 9.16.33 released ---

5962. [security] Fix memory leak in EdDSA verify processing.
(CVE-2022-38178) [GL #3487]

5961. [security] Fix memory leak in ECDSA verify processing.
(CVE-2022-38177) [GL #3487]

5960. [security] Fix serve-stale crash that could happen when
stale-answer-client-timeout was set to 0 and there was
a stale CNAME in the cache for an incoming query.
(CVE-2022-3080) [GL #3517]

5957. [security] Prevent excessive resource use while processing large
delegations. (CVE-2022-2795) [GL #3394]

5956. [func] Make RRL code treat all QNAMEs that are subject to
wildcard processing within a given zone as the same
name. [GL #3459]

5955. [port] The libxml2 library has deprecated the usage of
xmlInitThreads() and xmlCleanupThreads() functions. Use
xmlInitParser() and xmlCleanupParser() instead.
[GL #3518]

5954. [func] Fallback to IDNA2003 processing in dig when IDNA2008
conversion fails. [GL #3485]

5953. [bug] Fix a crash on shutdown in delete_trace_entry(). Add
mctx attach/detach pair to make sure that the memory
context used by a memory pool is not destroyed before
the memory pool itself. [GL #3515]

5952. [bug] Use quotes around address strings in YAML output.
[GL #3511]

5951. [bug] In some cases, the dnstap query_message field was
erroneously set when logging response messages.
[GL #3501]

5948. [bug] Fix nsec3.c:dns_nsec3_activex() function, add a missing
dns_db_detachnode() call. [GL #3500]

5945. [bug] If parsing /etc/bind.key failed, delv could assert
when trying to parse the built in trust anchors as
the parser hadn't been reset. [GL !6468]

5942. [bug] Fix tkey.c:buildquery() function's error handling by
adding the missing cleanup code. [GL #3492]

5941. [func] Zones with dnssec-policy now require dynamic DNS or
inline-siging to be configured explicitly. [GL #3381]

5936. [bug] Don't enable serve-stale for lookups that error because
it is a duplicate query or a query that would be
dropped. [GL #2982]

--- 9.16.32 released ---

5934. [func] Improve fetches-per-zone fetch limit logging to log
the final allowed and spilled values of the fetch
counters before the counter object gets destroyed.
[GL #3461]

5933. [port] Automatically disable RSASHA1 and NSEC3RSASHA1 in
named on Fedorda 33, Oracle Linux 9 and RHEL9 when
they are disabled by the security policy. [GL #3469]

5932. [bug] Fix rndc dumpdb -expired and always include expired
RRsets, not just for RBTDB_VIRTUAL time window.
[GL #3462]

5929. [bug] The "max-zone-ttl" option in "dnssec-policy" was
not fully effective; it was used for timing key
rollovers but did not actually place an upper limit
on TTLs when loading a zone. This has been
corrected, and the documentation has been clarified
to indicate that the old "max-zone-ttl" zone option
is now ignored when "dnssec-policy" is in use.
[GL #2918]

5924. [func] When it's necessary to use AXFR to respond to an
IXFR request, a message explaining the reason
is now logged at level info. [GL #2683]

5923. [bug] Fix inheritance for dnssec-policy when checking for
inline-signing. [GL #3438]

5922. [bug] Forwarding of UPDATE message could fail with the
introduction of netmgr. This has been fixed. [GL #3389]

--- 9.16.31 released ---

5917. [bug] Update ifconfig.sh script as is miscomputed interface
identifiers when destroying interfaces. [GL #3061]

5915. [bug] Detect missing closing brace (}) and computational
overflows in $GENERATE directives. [GL #3429]

5913. [bug] Fix a race between resolver query timeout and
validation in resolver.c:validated(). Remove
resolver.c:maybe_destroy() as it is no loger needed.
[GL #3398]

5909. [bug] The server-side destination port was missing from dnstap
captures of client traffic. [GL #3309]

5905. [bug] When the TCP connection would be closed/reset between
the connect/accept and the read, the uv_read_start()
return value would be unexpected and cause an assertion
failure. [GL #3400]

5903. [bug] When named checks that the OPCODE in a response matches
that of the request, if there is a mismatch named logs
an error. Some of those error messages incorrectly
used RCODE instead of OPCODE to lookup the nemonic.
This has been corrected. [GL !6420]

--- 9.16.30 released ---

5899. [func] Don't try to process DNSSEC-related and ZONEMD records
in catz. [GL #3380]

5890. [bug] When the fetches-per-server quota was adjusted
because of an authoritative server timing out more
or less frequently, it was incorrectly set to 1
rather than the intended value. This has been
fixed. [GL #3327]

5888. [bug] Only write key files if the dnssec-policy keymgr has
changed the metadata. [GL #3302]

5823. [func] Replace hazard pointers based lock-free list with
locked-list based queue that's simpler and has no or
little performance impact. [GL #3180]

--- 9.16.29 released ---

5885. [bug] RPZ NSIP and NSDNAME rule processing didn't handle stub
and static-stub zones at or above the query name. This
has now been addressed. [GL #3232]

5881. [bug] dig +nssearch could hang in rare cases when recv_done()
callback was being called earlier than send_done().
[GL #3278]

5880. [func] Add new named command-line option -C to print built-in
defaults. [GL #1326]

5879. [contrib] dlz: Add FALLTHROUGH and UNREACHABLE macros. [GL #3306]

5874. [bug] keymgr didn't work with python 3.11. [GL !6157]

5866. [bug] Work around a jemalloc quirk which could trigger an
out-of-memory condition in named over time. [GL #3287]

5863. [bug] If there was a pending negative cache DS entry,
validations depending upon it could fail. [GL #3279]

5858. [bug] Don't remove CDS/CDNSKEY DELETE records on zone sign
when using 'auto-dnssec maintain;'. [GL #2931]

--- 9.16.28 released ---

5856. [bug] The "starting maxtime timer" message related to outgoing
zone transfers was incorrectly logged at the ERROR level
instead of DEBUG(1). [GL #3208]

5852. [func] Add new "reuseport" option to enable/disable load
balancing of sockets. [GL #3249]

5843. [bug] When an UPDATE targets a zone that is not configured,
the requested zone name is now logged in the "not
authoritative" error message, so that it is easier to
track down problematic update clients. [GL #3209]

5836. [bug] Quote the dns64 prefix in error messages that complain
about problems with it, to avoid confusion with the
following dns64 ACLs. [GL #3210]

5834. [cleanup] C99 variable-length arrays are difficult to use safely,
so avoid them except in test code. [GL #3201]

5828. [bug] Replace single TCP write timer with per-TCP write
timers. [GL #3200]

5824. [bug] Invalid dnssec-policy definitions were being accepted
where the defined keys did not cover both KSK and ZSK
roles for a given algorithm. This is now checked for
and the dnssec-policy is rejected if both roles are
not present for all algorithms in use. [GL #3142]

--- 9.16.27 released ---

5818. [security] A synchronous call to closehandle_cb() caused
isc__nm_process_sock_buffer() to be called recursively,
which in turn left TCP connections hanging in the
CLOSE_WAIT state blocking indefinitely when
out-of-order processing was disabled. (CVE-2022-0396)
[GL #3112]

5817. [security] The rules for acceptance of records into the cache
have been tightened to prevent the possibility of
poisoning if forwarders send records outside
the configured bailiwick. (CVE-2021-25220) [GL #2950]

5816. [bug] Make BIND compile with LibreSSL 3.5.0, as it was using
not very accurate pre-processor checks for using shims.
[GL #3172]

5815. [bug] If an oversized key name of a specific length was used
in the text form of an HTTP or SVBC record, an INSIST
could be triggered when parsing it. [GL #3175]

5814. [bug] The RecursClients statistics counter could underflow
in certain resolution scenarios. [GL #3147]

5811. [bug] Reimplement the maximum and idle timeouts for outgoing
zone transfers. [GL #1897]

5807. [bug] Add a TCP "write" timer, and time out writing
connections after the "tcp-idle-timeout" period
has elapsed. [GL #3132]

5804. [func] Add a debug log message when starting and ending
the task exclusive mode. [GL #3137]

--- 9.16.26 released ---

5801. [bug] Log "quota reached" message when hard quota
is reached when accepting a connection. [GL #3125]

5800. [func] Add ECS support to the DLZ interface. [GL #3082]

5797. [bug] A failed view configuration during a named
reconfiguration procedure could cause inconsistencies
in BIND internal structures, causing a crash or other
unexpected errors. [GL #3060]

5795. [bug] rndc could crash when interrupted by a signal
before receiving a response. [GL #3080]

5793. [bug] Correctly detect and enable UDP recvmmsg support
in all versions of libuv that support it. [GL #3095]

--- 9.16.25 released ---

5789. [bug] Allow replacing expired zone signatures with
signatures created by the KSK. [GL #3049]

5788. [bug] An assertion could occur if a catalog zone event was
scheduled while the task manager was being shut
down. [GL #3074]

5787. [doc] Update 'auto-dnssec' documentation, it may only be
activated at zone level. [GL #3023]

5786. [bug] Defer detaching from zone->raw in zone_shutdown() if
the zone is in the process of being dumped to disk, to
ensure that the unsigned serial number information is
always written in the raw-format header of the signed
version on an inline-signed zone. [GL #3071]

5785. [bug] named could leak memory when two dnssec-policy clauses
had the same name. named failed to log this error.
[GL #3085]

5776. [bug] Add a missing isc_condition_destroy() for nmsocket
condition variable and add missing isc_mutex_destroy()
for nmworker lock. [GL #3051]

5676. [func] Memory use in named was excessive. This has been
addressed by:
- Replacing locked memory pools with normal memory
allocations.
- Reducing the number of retained free items in
unlocked memory pools.
- Disabling the internal allocator by default.
"named -M internal" turns it back on.
[GL #2398]

--- 9.16.24 released ---

5773. [func] Change the message when accepting TCP connection has
failed to say "Accepting TCP connection failed" and
change the log level for ISC_R_NOTCONNECTED, ISC_R_QUOTA
and ISC_R_SOFTQUOTA results codes from ERROR to INFO.
[GL #2700]

5768. [bug] dnssec-dsfromkey failed to omit revoked keys. [GL #853]

5764. [bug] dns_sdlz_putrr failed to process some valid resource
records. [GL #3021]

5762. [bug] Fix a "named" crash related to removing and restoring a
`catalog-zone` entry in the configuration file and
running `rndc reconfig`. [GL #1608]

5758. [bug] mdig now honors the operating system's preferred
ephemeral port range. [GL #2374]

5757. [test] Replace sed in nsupdate system test with awk to
construct the nsupdate command. The sed expression
was not reliably changing the ttl. [GL #3003]

--- 9.16.23 released ---

5752. [bug] Fix an assertion failure caused by missing member zones
during a reload of a catalog zone. [GL #2308]

5750. [bug] Fix a bug when comparing two RSA keys. There was a typo
which caused the "p" prime factors to not being
compared. [GL #2972]

5737. [bug] Address Coverity warning in lib/dns/dnssec.c.
[GL #2935]

--- 9.16.22 released ---

5736. [security] The "lame-ttl" option is now forcibly set to 0. This
effectively disables the lame server cache, as it could
previously be abused by an attacker to significantly
degrade resolver performance. (CVE-2021-25219)
[GL #2899]

5724. [bug] Address a potential deadlock when checking zone content
consistency. [GL #2908]

5723. [bug] Change 5709 broke backward compatibility for the
"check-names master ..." and "check-names slave ..."
options. This has been fixed. [GL #2911]

5720. [contrib] Old-style DLZ drivers that had to be enabled at
build-time have been marked as deprecated. [GL #2814]

5719. [func] The "map" zone file format has been marked as
deprecated. [GL #2882]

5717. [func] The "cache-file" option, which was documented as "for
testing purposes only" and not to be used, has been
removed. [GL #2903]

5716. [bug] Multiple library names were mistakenly passed to the
krb5-config utility when ./configure was invoked with
the --with-gssapi=[/path/to/]krb5-config option. This
has been fixed by invoking krb5-config separately for
each required library. [GL #2866]

5715. [func] Add a check for ports specified in "*-source(-v6)"
options clashing with a global listening port. Such a
configuration was already unsupported, but it failed
silently; it is now treated as an error. [GL #2888]

5714. [bug] Remove the "adjust interface" mechanism which was
responsible for setting up listeners on interfaces when
the "*-source(-v6)" address and port were the same as
the "listen-on(-v6)" address and port. Such a
configuration is no longer supported; under certain
timing conditions, that mechanism could prevent named
from listening on some TCP ports. This has been fixed.
[GL #2852]

5712. [doc] Add deprecation notice about removing native PKCS#11
support in the next major BIND 9 release. [GL #2691]

--- 9.16.21 released ---

5711. [bug] "map" files exceeding 2GB in size failed to load due to
a size comparison that incorrectly treated the file size
as a signed integer. [GL #2878]

5710. [port] win32: incorrect parentheses resulted in the wrong
sizeof() tests being used to pick the appropriate
Windows atomic operations for the object's size.
[GL #2891]

5709. [cleanup] Enum values throughout the code have been updated
to use the terms "primary" and "secondary" instead of
"master" and "slave", respectively. [GL #1944]

5708. [bug] The thread-local isc_tid_v variable was not properly
initialized when running BIND 9 as a Windows Service,
leading to a crash on startup. [GL #2837]

5705. [bug] Change #5686 altered the internal memory structure of
zone databases, but neglected to update the MAPAPI value
for zone files in "map" format. This caused named to
attempt to load incompatible map files, triggering an
assertion failure on startup. The MAPAPI value has now
been updated, so named rejects outdated files when
encountering them. [GL #2872]

5704. [bug] Change #5317 caused the EDNS TCP Keepalive option to be
ignored inadvertently in client requests. It has now
been fixed and this option is handled properly again.
[GL #1927]

5701. [bug] named-checkconf failed to detect syntactically invalid
values of the "key" and "tls" parameters used to define
members of remote server lists. [GL #2461]

5700. [bug] When a member zone was removed from a catalog zone,
journal files for the former were not deleted.
[GL #2842]

5699. [func] Data structures holding DNSSEC signing statistics are
now grown and shrunk as necessary upon key rollover
events. [GL #1721]

5698. [bug] When a DNSSEC-signed zone which only has a single
signing key available is migrated to use KASP, that key
is now treated as a Combined Signing Key (CSK).
[GL #2857]

5696. [protocol] Support for HTTPS and SVCB record types has been added.
(This does not include ADDITIONAL section processing for
these record types, only basic support for RR type
parsing and printing.) [GL #1132]

5694. [bug] Stale data in the cache could cause named to send
non-minimized queries despite QNAME minimization being
enabled. [GL #2665]

5691. [bug] When a dynamic zone was made available in another view
using the "in-view" statement, running "rndc freeze"
always reported an "already frozen" error even though
the zone was successfully frozen. [GL #2844]

5690. [func] dnssec-signzone now honors Predecessor and Successor
metadata found in private key files: if a signature for
an RRset generated by the inactive predecessor exists
and does not need to be replaced, no additional
signature is now created for that RRset using the
successor key. This enables dnssec-signzone to gradually
replace RRSIGs during a ZSK rollover. [GL #1551]

Import bind-9.16.20

--- 9.16.20 released ---

5689. [security] An assertion failure occurred when named attempted to
send a UDP packet that exceeded the MTU size, if
Response Rate Limiting (RRL) was enabled.
(CVE-2021-25218) [GL #2856]

5688. [bug] Zones using KASP and inline-signed zones failed to apply
changes from the unsigned zone to the signed zone under
certain circumstances. This has been fixed. [GL #2735]

5687. [bug] "rndc reload <zonename>" could trigger a redundant
reload for an inline-signed zone whose zone file was not
modified since the last "rndc reload". This has been
fixed. [GL #2855]

5686. [func] The number of internal data structures allocated for
each zone was reduced. [GL #2829]

5685. [bug] named failed to check the opcode of responses when
performing zone refreshes, stub zone updates, and UPDATE
forwarding. This has been fixed. [GL #2762]

5682. [bug] Some changes to "zone-statistics" settings were not
properly processed by "rndc reconfig". This has been
fixed. [GL #2820]

5681. [func] Relax the checks in the dns_zone_cdscheck() function to
allow CDS and CDNSKEY records in the zone that do not
match an existing DNSKEY record, as long as the
algorithm matches. This allows a clean rollover from one
provider to another in a multi-signer DNSSEC
configuration. [GL #2710]

5679. [func] Thread affinity is no longer set. [GL #2822]

5678. [bug] The "check DS" code failed to release all resources upon
named shutdown when a refresh was in progress. This has
been fixed. [GL #2811]

5672. [bug] Authentication of rndc messages could fail if a
"controls" statement was configured with multiple key
algorithms for the same listener. This has been fixed.
[GL #2756]

--- 9.16.19 released ---

5671. [bug] A race condition could occur where two threads were
competing for the same set of key file locks, leading to
a deadlock. This has been fixed. [GL #2786]

5670. [bug] create_keydata() created an invalid placeholder keydata
record upon a refresh failure, which prevented the
database of managed keys from subsequently being read
back. This has been fixed. [GL #2686]

5669. [func] KASP support was extended with the "check DS" feature.
Zones with "dnssec-policy" and "parental-agents"
configured now check for DS presence and can perform
automatic KSK rollovers. [GL #1126]

5668. [bug] Rescheduling a setnsec3param() task when a zone failed
to load on startup caused a hang on shutdown. This has
been fixed. [GL #2791]

5667. [bug] The configuration-checking code failed to account for
the inheritance rules of the "dnssec-policy" option.
This has been fixed. [GL #2780]

5666. [doc] The safe "edns-udp-size" value was tweaked to match the
probing value from BIND 9.16 for better compatibility.
[GL #2183]

5665. [bug] If nsupdate sends an SOA request and receives a REFUSED
response, it now fails over to the next available
server. [GL #2758]

5664. [func] For UDP messages larger than the path MTU, named now
sends an empty response with the TC (TrunCated) bit set.
In addition, setting the DF (Don't Fragment) flag on
outgoing UDP sockets was re-enabled. [GL #2790]

5662. [bug] Views with recursion disabled are now configured with a
default cache size of 2 MB unless "max-cache-size" is
explicitly set. This prevents cache RBT hash tables from
being needlessly preallocated for such views. [GL #2777]

5661. [bug] Change 5644 inadvertently introduced a deadlock: when
locking the key file mutex for each zone structure in a
different view, the "in-view" logic was not considered.
This has been fixed. [GL #2783]

5658. [bug] Increasing "max-cache-size" for a running named instance
(using "rndc reconfig") did not cause the hash tables
used by cache databases to be grown accordingly. This
has been fixed. [GL #2770]

5655. [bug] Signed, insecure delegation responses prepared by named
either lacked the necessary NSEC records or contained
duplicate NSEC records when both wildcard expansion and
CNAME chaining were required to prepare the response.
This has been fixed. [GL #2759]

5653. [bug] A bug that caused the NSEC3 salt to be changed on every
restart for zones using KASP has been fixed. [GL #2725]

--- 9.16.18 released ---

5660. [bug] The configuration-checking code failed to account for
the inheritance rules of the "key-directory" option.
[GL #2778]

5659. [bug] When preparing DNS responses, named could replace the
letters 'W' (uppercase) and 'w' (lowercase) with '\000'.
This has been fixed. [GL #2779]

--- 9.16.17 released ---

5652. [bug] A copy-and-paste error in change 5584 caused the
IP_DONTFRAG socket option to be enabled instead of
disabled. This has been fixed. [GL #2746]

5651. [func] Refactor zone dumping to be processed asynchronously via
the uv_work_t thread pool API. [GL #2732]

5650. [bug] Prevent a crash that could occur if serve-stale was
enabled and a prefetch was triggered during a query
restart. [GL #2733]

5649. [bug] If a query was answered with stale data on a server with
DNS64 enabled, an assertion could occur if a non-stale
answer arrived afterward. [GL #2731]

5648. [bug] The calculation of the estimated IXFR transaction size
in dns_journal_iter_init() was invalid. [GL #2685]

5644. [bug] Fix a race condition in reading and writing key files
for zones using KASP and configured in multiple views.
[GL #1875]

5643. [cleanup] "make install" no longer creates an empty
${localstatedir}/run directory. [GL #2709]

5642. [bug] Zones which are configured in multiple views with
different values set for "dnssec-policy" and with
identical values set for "key-directory" are now
detected and treated as a configuration error.
[GL #2463]

5641. [bug] Address a potential memory leak in
dst_key_fromnamedfile(). [GL #2689]

5639. [bug] Check that the first and last SOA record of an AXFR are
consistent. [GL #2528]

5638. [bug] Improvements related to network manager/task manager
integration:
- isc_managers_create() and isc_managers_destroy()
functions were added to handle setup and teardown of
netmgr, taskmgr, timermgr, and socketmgr, since these
require a precise order of operations now.
- Event queue processing is now quantized to prevent
infinite looping.
- The netmgr can now be paused from within a netmgr
thread.
- Deadlocks due to a conflict between netmgr's
pause/resume and listen/stoplistening operations were
fixed.
[GL #2654]

5633. [doc] The "inline-signing" option was incorrectly described as
being inherited from the "options"/"view" levels and was
incorrectly accepted at those levels without effect.
This has been fixed. [GL #2536]

5624. [func] Task manager events are now processed inside network
manager loops. The task manager no longer needs its own
set of worker threads, which improves resolver
performance. [GL #2638]

--- 9.16.16 released ---

5637. [func] Change the default value of the "max-ixfr-ratio" option
to "unlimited". [GL #2671]

5636. [bug] named and named-checkconf did not report an error when
multiple zones with the "dnssec-policy" option set were
using the same zone file. This has been fixed.
[GL #2603]

5635. [bug] Journal compaction could fail when a journal with
invalid transaction headers was not detected at startup.
This has been fixed. [GL #2670]

5634. [bug] If "dnssec-policy" was active and a private key file was
temporarily offline during a rekey event, named could
incorrectly introduce replacement keys and break a
signed zone. This has been fixed. [GL #2596]

5633. [doc] The "inline-signing" option was incorrectly described as
being inherited from the "options"/"view" levels and was
incorrectly accepted at those levels without effect.
This has been fixed. [GL #2536]

5632. [func] Add a new built-in KASP, "insecure", which is used to
transition a zone from a signed to an unsigned state.
The existing built-in KASP "none" should no longer be
used to unsign a zone. [GL #2645]

5631. [protocol] Update the implementation of the ZONEMD RR type to match
RFC 8976. [GL #2658]

5630. [func] Treat DNSSEC responses containing NSEC3 records with
iteration counts greater than 150 as insecure.
[GL #2445]

5629. [func] Reduce the maximum supported number of NSEC3 iterations
that can be configured for a zone to 150. [GL #2642]

5627. [bug] RRSIG(SOA) RRsets placed anywhere other than at the zone
apex were triggering infinite resigning loops. This has
been fixed. [GL #2650]

5626. [bug] When generating zone signing keys, KASP now also checks
for key ID conflicts among newly created keys, rather
than just between new and existing ones. [GL #2628]

5625. [bug] A deadlock could occur when multiple "rndc addzone",
"rndc delzone", and/or "rndc modzone" commands were
invoked simultaneously for different zones. This has
been fixed. [GL #2626]

5622. [cleanup] The lib/samples/ directory has been removed, as export
versions of libraries are no longer maintained.
[GL !4835]

5619. [protocol] Implement draft-vandijk-dnsop-nsec-ttl, updating the
protocol such that NSEC(3) TTL values are set to the
minimum of the SOA MINIMUM value or the SOA TTL.
[GL #2347]

5618. [bug] Change 5149 introduced some inconsistencies in the way
record TTLs were presented in cache dumps. These
inconsistencies have been eliminated. [GL #389]
[GL #2289]

--- 9.16.12 released ---

5578. [protocol] Make "check-names" accept A records below "_spf",
"_spf_rate", and "_spf_verify" labels in order to cater
for the "exists" SPF mechanism specified in RFC 7208
section 5.7 and appendix D.1. [GL #2377]

5577. [bug] Fix the "three is a crowd" key rollover bug in KASP by
correctly implementing Equation (2) of the "Flexible and
Robust Key Rollover" paper. [GL #2375]

5575. [bug] When migrating to KASP, BIND 9 considered keys with the
"Inactive" and/or "Delete" timing metadata to be
possible active keys. This has been fixed. [GL #2406]

5572. [bug] Address potential double free in generatexml().
[GL #2420]

5571. [bug] named failed to start when its configuration included a
zone with a non-builtin "allow-update" ACL attached.
[GL #2413]

5570. [bug] Improve performance of the DNSSEC verification code by
reducing the number of repeated calls to
dns_dnssec_keyfromrdata(). [GL #2073]

5569. [bug] Emit useful error message when "rndc retransfer" is
applied to a zone of inappropriate type. [GL #2342]

5568. [bug] Fixed a crash in "dnssec-keyfromlabel" when using ECDSA
keys. [GL #2178]

5567. [bug] Dig now reports unknown dash options while pre-parsing
the options. This prevents "-multi" instead of "+multi"
from reporting memory usage before ending option parsing
with "Invalid option: -lti". [GL #2403]

5566. [func] Add "stale-answer-client-timeout" option, which is the
amount of time a recursive resolver waits before
attempting to answer the query using stale data from
cache. [GL #2247]

5565. [func] The SONAMEs for BIND 9 libraries now include the current
BIND 9 version number, in an effort to tightly couple
internal libraries with a specific release. [GL #2387]

5562. [security] Fix off-by-one bug in ISC SPNEGO implementation.
(CVE-2020-8625) [GL #2354]

5561. [bug] KASP incorrectly set signature validity to the value of
the DNSKEY signature validity. This is now fixed.
[GL #2383]

5560. [func] The default value of "max-stale-ttl" has been changed
from 12 hours to 1 day and the default value of
"stale-answer-ttl" has been changed from 1 second to 30
seconds, following RFC 8767 recommendations. [GL #2248]

5456. [func] Added "primaries" as a synonym for "masters" in
named.conf, and "primary-only" as a synonym for
"master-only" in the parameters to "notify", to bring
terminology up-to-date with RFC 8499. [GL #1948]

5362. [func] Limit the size of IXFR responses so that AXFR will
be used instead if it would be smaller. This is
controlled by the "max-ixfr-ratio" option, which
is a percentage representing the ratio of IXFR size
to the size of the entire zone. This value cannot
exceed 100%, which is the default. [GL #1515]

--- 9.16.11 released ---

5559. [bug] The --with-maxminddb=PATH form of the build-time option
enabling support for libmaxminddb was not working
correctly. This has been fixed. [GL #2366]

5557. [bug] Prevent RBTDB instances from being destroyed by multiple
threads at the same time. [GL #2317]

5556. [bug] Further tweak newline printing in dnssec-signzone and
dnssec-verify. [GL #2359]

5555. [bug] server->reload_status was not properly initialized.
[GL #2361]

5554. [bug] dnssec-signzone and dnssec-verify were missing newlines
between log messages. [GL #2359]

5553. [bug] When reconfiguring named, removing "auto-dnssec" did not
turn off DNSSEC maintenance. [GL #2341]

5552. [func] When switching to "dnssec-policy none;", named now
permits a safe transition to insecure mode and publishes
the CDS and CDNSKEY DELETE records, as described in RFC
8078. [GL #1750]

5551. [bug] named no longer attempts to assign threads to CPUs
outside the CPU affinity set. Thanks to Ole Bj��rn
Hessen. [GL #2245]

5550. [func] dnssec-signzone and named now log a warning when falling
back to the "increment" SOA serial method. [GL #2058]

5545. [func] OS support for load-balanced sockets is no longer
required to receive incoming queries in multiple netmgr
threads. [GL #2137]

5543. [bug] Fix UDP performance issues caused by making netmgr
callbacks asynchronous-only. [GL #2320]

5542. [bug] Refactor netmgr. [GL #1920] [GL #2034] [GL #2061]
[GL #2194] [GL #2221] [GL #2266] [GL #2283] [GL #2318]
[GL #2321]

--- 9.16.10 released ---

5544. [func] Restore the default value of "nocookie-udp-size" to 4096
bytes. [GL #2250]

5541. [func] Adjust the "max-recursion-queries" default from 75 to
100. [GL #2305]

5540. [port] Fix building with native PKCS#11 support for AEP Keyper.
[GL #2315]

5539. [bug] Tighten handling of missing DNS COOKIE responses over
UDP by falling back to TCP. [GL #2275]

5538. [func] Add NSEC3 support to KASP. A new option for
"dnssec-policy", "nsec3param", can be used to set the
desired NSEC3 parameters. NSEC3 salt collisions are
automatically prevented during resalting. Salt
generation is now logged with zone context. [GL #1620]

5534. [bug] The CNAME synthesized from a DNAME was incorrectly
followed when the QTYPE was CNAME or ANY. [GL #2280]

--- 9.16.9 released ---

5533. [func] Add the "stale-refresh-time" option, a time window that
starts after a failed lookup, during which a stale RRset
is served directly from cache before a new attempt to
refresh it is made. [GL #2066]

5530. [bug] dnstap did not capture responses to forwarded UPDATE
requests. [GL #2252]

5527. [bug] A NULL pointer dereference occurred when creating an NTA
recheck query failed. [GL #2244]

5525. [bug] Change 5503 inadvertently broke cross-compilation by
replacing a call to AC_LINK_IFELSE() with a call to
AC_RUN_IFELSE() in configure.ac. This has been fixed,
making cross-compilation possible again. [GL #2237]

5523. [bug] The initial lookup in a zone transitioning to/from a
signed state could fail if the DNSKEY RRset was not
found. [GL #2236]

5522. [bug] Fixed a race/NULL dereference in TCPDNS send. [GL #2227]

5520. [bug] Fixed a number of shutdown races, reference counting
errors, and spurious log messages that could occur
in the network manager. [GL #2221]

5518. [bug] Stub zones now work correctly with primary servers using
"minimal-responses yes". [GL #1736]

5517. [bug] Do not treat UV_EOF as a TCP4RecvErr or a TCP6RecvErr.
[GL #2208]

--- 9.16.8 released ---

5516. [func] The default EDNS buffer size has been changed from 4096
to 1232 bytes. [GL #2183]

5515. [func] Add 'rndc dnssec -rollover' command to trigger a manual
rollover for a specific key. [GL #1749]

5514. [bug] Fix KASP expected key size for Ed25519 and Ed448.
[GL #2171]

5513. [doc] The ARM section describing the "rrset-order" statement
was rewritten to make it unambiguous and up-to-date with
the source code. [GL #2139]

5512. [bug] "rrset-order" rules using "order none" were causing
named to crash despite named-checkconf treating them as
valid. [GL #2139]

5511. [bug] 'dig -u +yaml' failed to display timestamps to the
microsecond. [GL #2190]

5510. [bug] Implement the attach/detach semantics for dns_message_t
to fix a data race in accessing an already-destroyed
fctx->rmessage. [GL #2124]

5509. [bug] filter-aaaa: named crashed upon shutdown if it was in
the process of recursing for A RRsets. [GL #1040]

5508. [func] Added new parameter "-expired" for "rndc dumpdb" that
also prints expired RRsets (awaiting cleanup) to the
dump file. [GL #1870]

5507. [bug] Named could compute incorrect SIG(0) responses.
[GL #2109]

5506. [bug] Properly handle failed sysconf() calls, so we don't
report invalid memory size. [GL #2166]

5505. [bug] Updating contents of a mixed-case RPZ could cause some
rules to be ignored. [GL #2169]

5503. [bug] Cleaned up reference counting of network manager
handles, now using isc_nmhandle_attach() and _detach()
instead of _ref() and _unref(). [GL #2122]

--- 9.16.7 released ---

5501. [func] Log CDS/CDNSKEY publication. [GL #1748]

5500. [bug] Fix (non-)publication of CDS and CDNSKEY records.
[GL #2103]

5499. [func] Add '-P ds' and '-D ds' arguments to dnssec-settime.
[GL #1748]

5497. [bug] 'dig +bufsize=0' failed to disable EDNS. [GL #2054]

5496. [bug] Address a TSAN report by ensuring each rate limiter
object holds a reference to its task. [GL #2081]

5495. [bug] With query minimization enabled, named failed to
resolve ip6.arpa. names that had extra labels to the
left of the IPv6 part. [GL #1847]

5494. [bug] Silence the EPROTO syslog message on older systems.
[GL #1928]

5493. [bug] Fix off-by-one error when calculating new hash table
size. [GL #2104]

5492. [bug] Tighten LOC parsing to reject a period (".") and/or "m"
as a value. Fix handling of negative altitudes which are
not whole meters. [GL #2074]

5491. [bug] rbtversion->glue_table_size could be read without the
appropriate lock being held. [GL #2080]

5489. [bug] Named erroneously accepted certain invalid resource
records that were incorrectly processed after
subsequently being written to disk and loaded back, as
the wire format differed. Such records include: CERT,
IPSECKEY, NSEC3, NSEC3PARAM, NXT, SIG, TLSA, WKS, and
X25. [GL !3953]

5488. [bug] NTA code needed to have a weak reference on its
associated view to prevent the latter from being deleted
while NTA tests were being performed. [GL #2067]

5486. [func] Add 'rndc dnssec -checkds' command, which signals to
named that the DS record for a given zone or key has
been updated in the parent zone. [GL #1613]

--- 9.16.6 released ---

5484. [func] Expire zero TTL records quickly rather than using them
for stale answers. [GL #1829]

5483. [func] A new configuration option "stale-cache-enable" has been
introduced to enable or disable keeping stale answers in
cache. [GL #1712]

5482. [bug] If the Duplicate Address Detection (DAD) mechanism had
not yet finished after adding a new IPv6 address to the
system, BIND 9 would fail to bind to IPv6 addresses in a
tentative state. [GL #2038]

5481. [security] "update-policy" rules of type "subdomain" were
incorrectly treated as "zonesub" rules, which allowed
keys used in "subdomain" rules to update names outside
of the specified subdomains. The problem was fixed by
making sure "subdomain" rules are again processed as
described in the ARM. (CVE-2020-8624) [GL #2055]

5480. [security] When BIND 9 was compiled with native PKCS#11 support, it
was possible to trigger an assertion failure in code
determining the number of bits in the PKCS#11 RSA public
key with a specially crafted packet. (CVE-2020-8623)
[GL #2037]

5479. [security] named could crash in certain query resolution scenarios
where QNAME minimization and forwarding were both
enabled. (CVE-2020-8621) [GL #1997]

5478. [security] It was possible to trigger an assertion failure by
sending a specially crafted large TCP DNS message.
(CVE-2020-8620) [GL #1996]

5477. [bug] The idle timeout for connected TCP sockets, which was
previously set to a high fixed value, is now derived
from the client query processing timeout configured for
a resolver. [GL #2024]

5476. [security] It was possible to trigger an assertion failure when
verifying the response to a TSIG-signed request.
(CVE-2020-8622) [GL #2028]

5475. [bug] Wildcard RPZ passthru rules could incorrectly be
overridden by other rules that were loaded from RPZ
zones which appeared later in the "response-policy"
statement. This has been fixed. [GL #1619]

5474. [bug] dns_rdata_hip_next() failed to return ISC_R_NOMORE
when it should have. [GL !3880]

5473. [func] The RBT hash table implementation has been changed
to use a faster hash function (HalfSipHash2-4) and
Fibonacci hashing for better distribution. Setting
"max-cache-size" now preallocates a fixed-size hash
table so that rehashing does not cause resolution
brownouts while the hash table is grown. [GL #1775]

5471. [bug] The introduction of KASP support inadvertently caused
the second field of "sig-validity-interval" to always be
calculated in hours, even in cases when it should have
been calculated in days. This has been fixed. (Thanks to
Tony Finch.) [GL !3735]

5469. [port] On illumos, a constant called SEC is already defined in
<sys/time.h>, which conflicts with an identically named
constant in libbind9. This conflict has been resolved.
[GL #1993]

5468. [bug] Addressed potential double unlock in process_fd().
[GL #2005]

5466. [bug] Addressed an error in recursive clients stats reporting.
[GL #1719]

5465. [func] Added fallback to built-in trust-anchors, managed-keys,
or trusted-keys if the bindkeys-file (bind.keys) cannot
be parsed. [GL #1235]

5464. [bug] Requesting more than 128 files to be saved when rolling
dnstap log files caused a buffer overflow. This has been
fixed. [GL #1989]

5462. [bug] Move LMDB locking from LMDB itself to named. [GL #1976]

5461. [bug] The STALE rdataset header attribute was updated while
the write lock was not being held, leading to incorrect
statistics. The header attributes are now converted to
use atomic operations. [GL #1475]

--- 9.16.5 released ---

5458. [bug] Prevent a theoretically possible NULL dereference caused
by a data race between zone_maintenance() and
dns_zone_setview_helper(). [GL #1627]

5455. [bug] named could crash when cleaning dead nodes in
lib/dns/rbtdb.c that were being reused. [GL #1968]

5454. [bug] Address a startup crash that occurred when the server
was under load and the root zone had not yet been
loaded. [GL #1862]

5453. [bug] named crashed on shutdown when a new rndc connection was
received during shutdown. [GL #1747]

5452. [bug] The "blackhole" ACL was accidentally disabled for client
queries. [GL #1936]

5451. [func] Add 'rndc dnssec -status' command. [GL #1612]

5449. [bug] Fix a socket shutdown race in netmgr udp. [GL #1938]

5448. [bug] Fix a race condition in isc__nm_tcpdns_send().
[GL #1937]

5447. [bug] IPv6 addresses ending in "::" could break YAML
parsing. A "0" is now appended to such addresses
in YAML output from dig, mdig, delv, and dnstap-read.
[GL #1952]

5446. [bug] The validator could fail to accept a properly signed
RRset if an unsupported algorithm appeared earlier in
the DNSKEY RRset than a supported algorithm. It could
also stop if it detected a malformed public key.
[GL #1689]

5444. [bug] 'rndc dnstap -roll <value>' did not limit the number of
saved files to <value>. [GL !3728]

5443. [bug] The "primary" and "secondary" keywords, when used
as parameters for "check-names", were not
processed correctly and were being ignored. [GL #1949]

5441. [bug] ${LMDB_CFLAGS} was missing from make/includes.in.
[GL #1955]

5440. [test] Properly handle missing kyua. [GL #1950]

5439. [bug] The DS RRset returned by dns_keynode_dsset() was used in
a non-thread-safe manner. [GL #1926]

--- 9.16.4 released ---

5438. [bug] Fix a race in TCP accepting code. [GL #1930]

5437. [bug] Fix a data race in lib/dns/resolver.c:log_formerr().
[GL #1808]

5436. [security] It was possible to trigger an INSIST when determining
whether a record would fit into a TCP message buffer.
(CVE-2020-8618) [GL #1850]

5435. [tests] Add RFC 4592 responses examples to the wildcard system
test. [GL #1718]

5434. [security] It was possible to trigger an INSIST in
lib/dns/rbtdb.c:new_reference() with a particular zone
content and query patterns. (CVE-2020-8619) [GL #1111]
[GL #1718]

5431. [func] Reject DS records at the zone apex when loading
master files. Log but otherwise ignore attempts to
add DS records at the zone apex via UPDATE. [GL #1798]

5430. [doc] Update docs - with netmgr, a separate listening socket
is created for each IPv6 interface (just as with IPv4).
[GL #1782]

5428. [bug] Clean up GSSAPI resources in nsupdate only after taskmgr
has been destroyed. Thanks to Petr Men����k. [GL !3316]

5426. [bug] Don't abort() when setting SO_INCOMING_CPU on the socket
fails. [GL #1911]

5425. [func] The default value of "max-stale-ttl" has been changed
from 1 week to 12 hours. [GL #1877]

5424. [bug] With KASP, when creating a successor key, the "goal"
state of the current active key (predecessor) was not
changed and thus never removed from the zone. [GL #1846]

5423. [bug] Fix a bug in keymgr_key_has_successor(): it incorrectly
returned true if any other key in the keyring had a
successor. [GL #1845]

5422. [bug] When using dnssec-policy, print correct key timing
metadata. [GL #1843]

5421. [bug] Fix a race that could cause named to crash when looking
up the nodename of an RBT node if the tree was modified.
[GL #1857]

5420. [bug] Add missing isc_{mutex,conditional}_destroy() calls
that caused a memory leak on FreeBSD. [GL #1893]

5418. [bug] delv failed to parse deprecated trusted-keys-style
trust anchors. [GL #1860]

5416. [bug] Fix a lock order inversion in lib/isc/unix/socket.c.
[GL #1859]

5415. [test] Address race in dnssec system test that led to
test failures. [GL #1852]

5414. [test] Adjust time allowed for journal truncation to occur
in nsupdate system test to avoid test failure.
[GL #1855]

5413. [test] Address race in autosign system test that led to
test failures. [GL #1852]

5412. [bug] 'provide-ixfr no;' failed to return up-to-date responses
when the serial was greater than or equal to the
current serial. [GL #1714]

5411. [cleanup] TCP accept code has been refactored to use a single
accept() and pass the accepted socket to child threads
for processing. [GL !3320]

5409. [performance] When looking up NSEC3 data in a zone database, skip the
check for empty non-terminal nodes; the NSEC3 tree does
not have any. [GL #1834]

5408. [protocol] Print Extended DNS Errors if present in OPT record.
[GL #1835]

5407. [func] Zone timers are now exported via statistics channel.
Thanks to Paul Frieden, Verizon Media. [GL #1232]

5405. [bug] 'named-checkconf -p' could include spurious text in
server-addresses statements due to an uninitialized DSCP
value. [GL #1812]

Import 9.16.33; last imported was 9.16.20

--- 9.16.33 released ---

5962. [security] Fix memory leak in EdDSA verify processing.
(CVE-2022-38178) [GL #3487]

5961. [security] Fix memory leak in ECDSA verify processing.
(CVE-2022-38177) [GL #3487]

5960. [security] Fix serve-stale crash that could happen when
stale-answer-client-timeout was set to 0 and there was
a stale CNAME in the cache for an incoming query.
(CVE-2022-3080) [GL #3517]

5957. [security] Prevent excessive resource use while processing large
delegations. (CVE-2022-2795) [GL #3394]

5956. [func] Make RRL code treat all QNAMEs that are subject to
wildcard processing within a given zone as the same
name. [GL #3459]

5955. [port] The libxml2 library has deprecated the usage of
xmlInitThreads() and xmlCleanupThreads() functions. Use
xmlInitParser() and xmlCleanupParser() instead.
[GL #3518]

5954. [func] Fallback to IDNA2003 processing in dig when IDNA2008
conversion fails. [GL #3485]

5953. [bug] Fix a crash on shutdown in delete_trace_entry(). Add
mctx attach/detach pair to make sure that the memory
context used by a memory pool is not destroyed before
the memory pool itself. [GL #3515]

5952. [bug] Use quotes around address strings in YAML output.
[GL #3511]

5951. [bug] In some cases, the dnstap query_message field was
erroneously set when logging response messages.
[GL #3501]

5948. [bug] Fix nsec3.c:dns_nsec3_activex() function, add a missing
dns_db_detachnode() call. [GL #3500]

5945. [bug] If parsing /etc/bind.key failed, delv could assert
when trying to parse the built in trust anchors as
the parser hadn't been reset. [GL !6468]

5942. [bug] Fix tkey.c:buildquery() function's error handling by
adding the missing cleanup code. [GL #3492]

5941. [func] Zones with dnssec-policy now require dynamic DNS or
inline-siging to be configured explicitly. [GL #3381]

5936. [bug] Don't enable serve-stale for lookups that error because
it is a duplicate query or a query that would be
dropped. [GL #2982]

--- 9.16.32 released ---

5934. [func] Improve fetches-per-zone fetch limit logging to log
the final allowed and spilled values of the fetch
counters before the counter object gets destroyed.
[GL #3461]

5933. [port] Automatically disable RSASHA1 and NSEC3RSASHA1 in
named on Fedorda 33, Oracle Linux 9 and RHEL9 when
they are disabled by the security policy. [GL #3469]

5932. [bug] Fix rndc dumpdb -expired and always include expired
RRsets, not just for RBTDB_VIRTUAL time window.
[GL #3462]

5929. [bug] The "max-zone-ttl" option in "dnssec-policy" was
not fully effective; it was used for timing key
rollovers but did not actually place an upper limit
on TTLs when loading a zone. This has been
corrected, and the documentation has been clarified
to indicate that the old "max-zone-ttl" zone option
is now ignored when "dnssec-policy" is in use.
[GL #2918]

5924. [func] When it's necessary to use AXFR to respond to an
IXFR request, a message explaining the reason
is now logged at level info. [GL #2683]

5923. [bug] Fix inheritance for dnssec-policy when checking for
inline-signing. [GL #3438]

5922. [bug] Forwarding of UPDATE message could fail with the
introduction of netmgr. This has been fixed. [GL #3389]

--- 9.16.31 released ---

5917. [bug] Update ifconfig.sh script as is miscomputed interface
identifiers when destroying interfaces. [GL #3061]

5915. [bug] Detect missing closing brace (}) and computational
overflows in $GENERATE directives. [GL #3429]

5913. [bug] Fix a race between resolver query timeout and
validation in resolver.c:validated(). Remove
resolver.c:maybe_destroy() as it is no loger needed.
[GL #3398]

5909. [bug] The server-side destination port was missing from dnstap
captures of client traffic. [GL #3309]

5905. [bug] When the TCP connection would be closed/reset between
the connect/accept and the read, the uv_read_start()
return value would be unexpected and cause an assertion
failure. [GL #3400]

5903. [bug] When named checks that the OPCODE in a response matches
that of the request, if there is a mismatch named logs
an error. Some of those error messages incorrectly
used RCODE instead of OPCODE to lookup the nemonic.
This has been corrected. [GL !6420]

--- 9.16.30 released ---

5899. [func] Don't try to process DNSSEC-related and ZONEMD records
in catz. [GL #3380]

5890. [bug] When the fetches-per-server quota was adjusted
because of an authoritative server timing out more
or less frequently, it was incorrectly set to 1
rather than the intended value. This has been
fixed. [GL #3327]

5888. [bug] Only write key files if the dnssec-policy keymgr has
changed the metadata. [GL #3302]

5823. [func] Replace hazard pointers based lock-free list with
locked-list based queue that's simpler and has no or
little performance impact. [GL #3180]

--- 9.16.29 released ---

5885. [bug] RPZ NSIP and NSDNAME rule processing didn't handle stub
and static-stub zones at or above the query name. This
has now been addressed. [GL #3232]

5881. [bug] dig +nssearch could hang in rare cases when recv_done()
callback was being called earlier than send_done().
[GL #3278]

5880. [func] Add new named command-line option -C to print built-in
defaults. [GL #1326]

5879. [contrib] dlz: Add FALLTHROUGH and UNREACHABLE macros. [GL #3306]

5874. [bug] keymgr didn't work with python 3.11. [GL !6157]

5866. [bug] Work around a jemalloc quirk which could trigger an
out-of-memory condition in named over time. [GL #3287]

5863. [bug] If there was a pending negative cache DS entry,
validations depending upon it could fail. [GL #3279]

5858. [bug] Don't remove CDS/CDNSKEY DELETE records on zone sign
when using 'auto-dnssec maintain;'. [GL #2931]

--- 9.16.28 released ---

5856. [bug] The "starting maxtime timer" message related to outgoing
zone transfers was incorrectly logged at the ERROR level
instead of DEBUG(1). [GL #3208]

5852. [func] Add new "reuseport" option to enable/disable load
balancing of sockets. [GL #3249]

5843. [bug] When an UPDATE targets a zone that is not configured,
the requested zone name is now logged in the "not
authoritative" error message, so that it is easier to
track down problematic update clients. [GL #3209]

5836. [bug] Quote the dns64 prefix in error messages that complain
about problems with it, to avoid confusion with the
following dns64 ACLs. [GL #3210]

5834. [cleanup] C99 variable-length arrays are difficult to use safely,
so avoid them except in test code. [GL #3201]

5828. [bug] Replace single TCP write timer with per-TCP write
timers. [GL #3200]

5824. [bug] Invalid dnssec-policy definitions were being accepted
where the defined keys did not cover both KSK and ZSK
roles for a given algorithm. This is now checked for
and the dnssec-policy is rejected if both roles are
not present for all algorithms in use. [GL #3142]

--- 9.16.27 released ---

5818. [security] A synchronous call to closehandle_cb() caused
isc__nm_process_sock_buffer() to be called recursively,
which in turn left TCP connections hanging in the
CLOSE_WAIT state blocking indefinitely when
out-of-order processing was disabled. (CVE-2022-0396)
[GL #3112]

5817. [security] The rules for acceptance of records into the cache
have been tightened to prevent the possibility of
poisoning if forwarders send records outside
the configured bailiwick. (CVE-2021-25220) [GL #2950]

5816. [bug] Make BIND compile with LibreSSL 3.5.0, as it was using
not very accurate pre-processor checks for using shims.
[GL #3172]

5815. [bug] If an oversized key name of a specific length was used
in the text form of an HTTP or SVBC record, an INSIST
could be triggered when parsing it. [GL #3175]

5814. [bug] The RecursClients statistics counter could underflow
in certain resolution scenarios. [GL #3147]

5811. [bug] Reimplement the maximum and idle timeouts for outgoing
zone transfers. [GL #1897]

5807. [bug] Add a TCP "write" timer, and time out writing
connections after the "tcp-idle-timeout" period
has elapsed. [GL #3132]

5804. [func] Add a debug log message when starting and ending
the task exclusive mode. [GL #3137]

--- 9.16.26 released ---

5801. [bug] Log "quota reached" message when hard quota
is reached when accepting a connection. [GL #3125]

5800. [func] Add ECS support to the DLZ interface. [GL #3082]

5797. [bug] A failed view configuration during a named
reconfiguration procedure could cause inconsistencies
in BIND internal structures, causing a crash or other
unexpected errors. [GL #3060]

5795. [bug] rndc could crash when interrupted by a signal
before receiving a response. [GL #3080]

5793. [bug] Correctly detect and enable UDP recvmmsg support
in all versions of libuv that support it. [GL #3095]

--- 9.16.25 released ---

5789. [bug] Allow replacing expired zone signatures with
signatures created by the KSK. [GL #3049]

5788. [bug] An assertion could occur if a catalog zone event was
scheduled while the task manager was being shut
down. [GL #3074]

5787. [doc] Update 'auto-dnssec' documentation, it may only be
activated at zone level. [GL #3023]

5786. [bug] Defer detaching from zone->raw in zone_shutdown() if
the zone is in the process of being dumped to disk, to
ensure that the unsigned serial number information is
always written in the raw-format header of the signed
version on an inline-signed zone. [GL #3071]

5785. [bug] named could leak memory when two dnssec-policy clauses
had the same name. named failed to log this error.
[GL #3085]

5776. [bug] Add a missing isc_condition_destroy() for nmsocket
condition variable and add missing isc_mutex_destroy()
for nmworker lock. [GL #3051]

5676. [func] Memory use in named was excessive. This has been
addressed by:
- Replacing locked memory pools with normal memory
allocations.
- Reducing the number of retained free items in
unlocked memory pools.
- Disabling the internal allocator by default.
"named -M internal" turns it back on.
[GL #2398]

--- 9.16.24 released ---

5773. [func] Change the message when accepting TCP connection has
failed to say "Accepting TCP connection failed" and
change the log level for ISC_R_NOTCONNECTED, ISC_R_QUOTA
and ISC_R_SOFTQUOTA results codes from ERROR to INFO.
[GL #2700]

5768. [bug] dnssec-dsfromkey failed to omit revoked keys. [GL #853]

5764. [bug] dns_sdlz_putrr failed to process some valid resource
records. [GL #3021]

5762. [bug] Fix a "named" crash related to removing and restoring a
`catalog-zone` entry in the configuration file and
running `rndc reconfig`. [GL #1608]

5758. [bug] mdig now honors the operating system's preferred
ephemeral port range. [GL #2374]

5757. [test] Replace sed in nsupdate system test with awk to
construct the nsupdate command. The sed expression
was not reliably changing the ttl. [GL #3003]

--- 9.16.23 released ---

5752. [bug] Fix an assertion failure caused by missing member zones
during a reload of a catalog zone. [GL #2308]

5750. [bug] Fix a bug when comparing two RSA keys. There was a typo
which caused the "p" prime factors to not being
compared. [GL #2972]

5737. [bug] Address Coverity warning in lib/dns/dnssec.c.
[GL #2935]

--- 9.16.22 released ---

5736. [security] The "lame-ttl" option is now forcibly set to 0. This
effectively disables the lame server cache, as it could
previously be abused by an attacker to significantly
degrade resolver performance. (CVE-2021-25219)
[GL #2899]

5724. [bug] Address a potential deadlock when checking zone content
consistency. [GL #2908]

5723. [bug] Change 5709 broke backward compatibility for the
"check-names master ..." and "check-names slave ..."
options. This has been fixed. [GL #2911]

5720. [contrib] Old-style DLZ drivers that had to be enabled at
build-time have been marked as deprecated. [GL #2814]

5719. [func] The "map" zone file format has been marked as
deprecated. [GL #2882]

5717. [func] The "cache-file" option, which was documented as "for
testing purposes only" and not to be used, has been
removed. [GL #2903]

5716. [bug] Multiple library names were mistakenly passed to the
krb5-config utility when ./configure was invoked with
the --with-gssapi=[/path/to/]krb5-config option. This
has been fixed by invoking krb5-config separately for
each required library. [GL #2866]

5715. [func] Add a check for ports specified in "*-source(-v6)"
options clashing with a global listening port. Such a
configuration was already unsupported, but it failed
silently; it is now treated as an error. [GL #2888]

5714. [bug] Remove the "adjust interface" mechanism which was
responsible for setting up listeners on interfaces when
the "*-source(-v6)" address and port were the same as
the "listen-on(-v6)" address and port. Such a
configuration is no longer supported; under certain
timing conditions, that mechanism could prevent named
from listening on some TCP ports. This has been fixed.
[GL #2852]

5712. [doc] Add deprecation notice about removing native PKCS#11
support in the next major BIND 9 release. [GL #2691]

--- 9.16.21 released ---

5711. [bug] "map" files exceeding 2GB in size failed to load due to
a size comparison that incorrectly treated the file size
as a signed integer. [GL #2878]

5710. [port] win32: incorrect parentheses resulted in the wrong
sizeof() tests being used to pick the appropriate
Windows atomic operations for the object's size.
[GL #2891]

5709. [cleanup] Enum values throughout the code have been updated
to use the terms "primary" and "secondary" instead of
"master" and "slave", respectively. [GL #1944]

5708. [bug] The thread-local isc_tid_v variable was not properly
initialized when running BIND 9 as a Windows Service,
leading to a crash on startup. [GL #2837]

5705. [bug] Change #5686 altered the internal memory structure of
zone databases, but neglected to update the MAPAPI value
for zone files in "map" format. This caused named to
attempt to load incompatible map files, triggering an
assertion failure on startup. The MAPAPI value has now
been updated, so named rejects outdated files when
encountering them. [GL #2872]

5704. [bug] Change #5317 caused the EDNS TCP Keepalive option to be
ignored inadvertently in client requests. It has now
been fixed and this option is handled properly again.
[GL #1927]

5701. [bug] named-checkconf failed to detect syntactically invalid
values of the "key" and "tls" parameters used to define
members of remote server lists. [GL #2461]

5700. [bug] When a member zone was removed from a catalog zone,
journal files for the former were not deleted.
[GL #2842]

5699. [func] Data structures holding DNSSEC signing statistics are
now grown and shrunk as necessary upon key rollover
events. [GL #1721]

5698. [bug] When a DNSSEC-signed zone which only has a single
signing key available is migrated to use KASP, that key
is now treated as a Combined Signing Key (CSK).
[GL #2857]

5696. [protocol] Support for HTTPS and SVCB record types has been added.
(This does not include ADDITIONAL section processing for
these record types, only basic support for RR type
parsing and printing.) [GL #1132]

5694. [bug] Stale data in the cache could cause named to send
non-minimized queries despite QNAME minimization being
enabled. [GL #2665]

5691. [bug] When a dynamic zone was made available in another view
using the "in-view" statement, running "rndc freeze"
always reported an "already frozen" error even though
the zone was successfully frozen. [GL #2844]

5690. [func] dnssec-signzone now honors Predecessor and Successor
metadata found in private key files: if a signature for
an RRset generated by the inactive predecessor exists
and does not need to be replaced, no additional
signature is now created for that RRset using the
successor key. This enables dnssec-signzone to gradually
replace RRSIGs during a ZSK rollover. [GL #1551]

Import bind-9.16.20

--- 9.16.20 released ---

5689. [security] An assertion failure occurred when named attempted to
send a UDP packet that exceeded the MTU size, if
Response Rate Limiting (RRL) was enabled.
(CVE-2021-25218) [GL #2856]

5688. [bug] Zones using KASP and inline-signed zones failed to apply
changes from the unsigned zone to the signed zone under
certain circumstances. This has been fixed. [GL #2735]

5687. [bug] "rndc reload <zonename>" could trigger a redundant
reload for an inline-signed zone whose zone file was not
modified since the last "rndc reload". This has been
fixed. [GL #2855]

5686. [func] The number of internal data structures allocated for
each zone was reduced. [GL #2829]

5685. [bug] named failed to check the opcode of responses when
performing zone refreshes, stub zone updates, and UPDATE
forwarding. This has been fixed. [GL #2762]

5682. [bug] Some changes to "zone-statistics" settings were not
properly processed by "rndc reconfig". This has been
fixed. [GL #2820]

5681. [func] Relax the checks in the dns_zone_cdscheck() function to
allow CDS and CDNSKEY records in the zone that do not
match an existing DNSKEY record, as long as the
algorithm matches. This allows a clean rollover from one
provider to another in a multi-signer DNSSEC
configuration. [GL #2710]

5679. [func] Thread affinity is no longer set. [GL #2822]

5678. [bug] The "check DS" code failed to release all resources upon
named shutdown when a refresh was in progress. This has
been fixed. [GL #2811]

5672. [bug] Authentication of rndc messages could fail if a
"controls" statement was configured with multiple key
algorithms for the same listener. This has been fixed.
[GL #2756]

--- 9.16.19 released ---

5671. [bug] A race condition could occur where two threads were
competing for the same set of key file locks, leading to
a deadlock. This has been fixed. [GL #2786]

5670. [bug] create_keydata() created an invalid placeholder keydata
record upon a refresh failure, which prevented the
database of managed keys from subsequently being read
back. This has been fixed. [GL #2686]

5669. [func] KASP support was extended with the "check DS" feature.
Zones with "dnssec-policy" and "parental-agents"
configured now check for DS presence and can perform
automatic KSK rollovers. [GL #1126]

5668. [bug] Rescheduling a setnsec3param() task when a zone failed
to load on startup caused a hang on shutdown. This has
been fixed. [GL #2791]

5667. [bug] The configuration-checking code failed to account for
the inheritance rules of the "dnssec-policy" option.
This has been fixed. [GL #2780]

5666. [doc] The safe "edns-udp-size" value was tweaked to match the
probing value from BIND 9.16 for better compatibility.
[GL #2183]

5665. [bug] If nsupdate sends an SOA request and receives a REFUSED
response, it now fails over to the next available
server. [GL #2758]

5664. [func] For UDP messages larger than the path MTU, named now
sends an empty response with the TC (TrunCated) bit set.
In addition, setting the DF (Don't Fragment) flag on
outgoing UDP sockets was re-enabled. [GL #2790]

5662. [bug] Views with recursion disabled are now configured with a
default cache size of 2 MB unless "max-cache-size" is
explicitly set. This prevents cache RBT hash tables from
being needlessly preallocated for such views. [GL #2777]

5661. [bug] Change 5644 inadvertently introduced a deadlock: when
locking the key file mutex for each zone structure in a
different view, the "in-view" logic was not considered.
This has been fixed. [GL #2783]

5658. [bug] Increasing "max-cache-size" for a running named instance
(using "rndc reconfig") did not cause the hash tables
used by cache databases to be grown accordingly. This
has been fixed. [GL #2770]

5655. [bug] Signed, insecure delegation responses prepared by named
either lacked the necessary NSEC records or contained
duplicate NSEC records when both wildcard expansion and
CNAME chaining were required to prepare the response.
This has been fixed. [GL #2759]

5653. [bug] A bug that caused the NSEC3 salt to be changed on every
restart for zones using KASP has been fixed. [GL #2725]

--- 9.16.18 released ---

5660. [bug] The configuration-checking code failed to account for
the inheritance rules of the "key-directory" option.
[GL #2778]

5659. [bug] When preparing DNS responses, named could replace the
letters 'W' (uppercase) and 'w' (lowercase) with '\000'.
This has been fixed. [GL #2779]

--- 9.16.17 released ---

5652. [bug] A copy-and-paste error in change 5584 caused the
IP_DONTFRAG socket option to be enabled instead of
disabled. This has been fixed. [GL #2746]

5651. [func] Refactor zone dumping to be processed asynchronously via
the uv_work_t thread pool API. [GL #2732]

5650. [bug] Prevent a crash that could occur if serve-stale was
enabled and a prefetch was triggered during a query
restart. [GL #2733]

5649. [bug] If a query was answered with stale data on a server with
DNS64 enabled, an assertion could occur if a non-stale
answer arrived afterward. [GL #2731]

5648. [bug] The calculation of the estimated IXFR transaction size
in dns_journal_iter_init() was invalid. [GL #2685]

5644. [bug] Fix a race condition in reading and writing key files
for zones using KASP and configured in multiple views.
[GL #1875]

5643. [cleanup] "make install" no longer creates an empty
${localstatedir}/run directory. [GL #2709]

5642. [bug] Zones which are configured in multiple views with
different values set for "dnssec-policy" and with
identical values set for "key-directory" are now
detected and treated as a configuration error.
[GL #2463]

5641. [bug] Address a potential memory leak in
dst_key_fromnamedfile(). [GL #2689]

5639. [bug] Check that the first and last SOA record of an AXFR are
consistent. [GL #2528]

5638. [bug] Improvements related to network manager/task manager
integration:
- isc_managers_create() and isc_managers_destroy()
functions were added to handle setup and teardown of
netmgr, taskmgr, timermgr, and socketmgr, since these
require a precise order of operations now.
- Event queue processing is now quantized to prevent
infinite looping.
- The netmgr can now be paused from within a netmgr
thread.
- Deadlocks due to a conflict between netmgr's
pause/resume and listen/stoplistening operations were
fixed.
[GL #2654]

5633. [doc] The "inline-signing" option was incorrectly described as
being inherited from the "options"/"view" levels and was
incorrectly accepted at those levels without effect.
This has been fixed. [GL #2536]

5624. [func] Task manager events are now processed inside network
manager loops. The task manager no longer needs its own
set of worker threads, which improves resolver
performance. [GL #2638]

--- 9.16.16 released ---

5637. [func] Change the default value of the "max-ixfr-ratio" option
to "unlimited". [GL #2671]

5636. [bug] named and named-checkconf did not report an error when
multiple zones with the "dnssec-policy" option set were
using the same zone file. This has been fixed.
[GL #2603]

5635. [bug] Journal compaction could fail when a journal with
invalid transaction headers was not detected at startup.
This has been fixed. [GL #2670]

5634. [bug] If "dnssec-policy" was active and a private key file was
temporarily offline during a rekey event, named could
incorrectly introduce replacement keys and break a
signed zone. This has been fixed. [GL #2596]

5633. [doc] The "inline-signing" option was incorrectly described as
being inherited from the "options"/"view" levels and was
incorrectly accepted at those levels without effect.
This has been fixed. [GL #2536]

5632. [func] Add a new built-in KASP, "insecure", which is used to
transition a zone from a signed to an unsigned state.
The existing built-in KASP "none" should no longer be
used to unsign a zone. [GL #2645]

5631. [protocol] Update the implementation of the ZONEMD RR type to match
RFC 8976. [GL #2658]

5630. [func] Treat DNSSEC responses containing NSEC3 records with
iteration counts greater than 150 as insecure.
[GL #2445]

5629. [func] Reduce the maximum supported number of NSEC3 iterations
that can be configured for a zone to 150. [GL #2642]

5627. [bug] RRSIG(SOA) RRsets placed anywhere other than at the zone
apex were triggering infinite resigning loops. This has
been fixed. [GL #2650]

5626. [bug] When generating zone signing keys, KASP now also checks
for key ID conflicts among newly created keys, rather
than just between new and existing ones. [GL #2628]

5625. [bug] A deadlock could occur when multiple "rndc addzone",
"rndc delzone", and/or "rndc modzone" commands were
invoked simultaneously for different zones. This has
been fixed. [GL #2626]

5622. [cleanup] The lib/samples/ directory has been removed, as export
versions of libraries are no longer maintained.
[GL !4835]

5619. [protocol] Implement draft-vandijk-dnsop-nsec-ttl, updating the
protocol such that NSEC(3) TTL values are set to the
minimum of the SOA MINIMUM value or the SOA TTL.
[GL #2347]

5618. [bug] Change 5149 introduced some inconsistencies in the way
record TTLs were presented in cache dumps. These
inconsistencies have been eliminated. [GL #389]
[GL #2289]

--- 9.16.12 released ---

5578. [protocol] Make "check-names" accept A records below "_spf",
"_spf_rate", and "_spf_verify" labels in order to cater
for the "exists" SPF mechanism specified in RFC 7208
section 5.7 and appendix D.1. [GL #2377]

5577. [bug] Fix the "three is a crowd" key rollover bug in KASP by
correctly implementing Equation (2) of the "Flexible and
Robust Key Rollover" paper. [GL #2375]

5575. [bug] When migrating to KASP, BIND 9 considered keys with the
"Inactive" and/or "Delete" timing metadata to be
possible active keys. This has been fixed. [GL #2406]

5572. [bug] Address potential double free in generatexml().
[GL #2420]

5571. [bug] named failed to start when its configuration included a
zone with a non-builtin "allow-update" ACL attached.
[GL #2413]

5570. [bug] Improve performance of the DNSSEC verification code by
reducing the number of repeated calls to
dns_dnssec_keyfromrdata(). [GL #2073]

5569. [bug] Emit useful error message when "rndc retransfer" is
applied to a zone of inappropriate type. [GL #2342]

5568. [bug] Fixed a crash in "dnssec-keyfromlabel" when using ECDSA
keys. [GL #2178]

5567. [bug] Dig now reports unknown dash options while pre-parsing
the options. This prevents "-multi" instead of "+multi"
from reporting memory usage before ending option parsing
with "Invalid option: -lti". [GL #2403]

5566. [func] Add "stale-answer-client-timeout" option, which is the
amount of time a recursive resolver waits before
attempting to answer the query using stale data from
cache. [GL #2247]

5565. [func] The SONAMEs for BIND 9 libraries now include the current
BIND 9 version number, in an effort to tightly couple
internal libraries with a specific release. [GL #2387]

5562. [security] Fix off-by-one bug in ISC SPNEGO implementation.
(CVE-2020-8625) [GL #2354]

5561. [bug] KASP incorrectly set signature validity to the value of
the DNSKEY signature validity. This is now fixed.
[GL #2383]

5560. [func] The default value of "max-stale-ttl" has been changed
from 12 hours to 1 day and the default value of
"stale-answer-ttl" has been changed from 1 second to 30
seconds, following RFC 8767 recommendations. [GL #2248]

5456. [func] Added "primaries" as a synonym for "masters" in
named.conf, and "primary-only" as a synonym for
"master-only" in the parameters to "notify", to bring
terminology up-to-date with RFC 8499. [GL #1948]

5362. [func] Limit the size of IXFR responses so that AXFR will
be used instead if it would be smaller. This is
controlled by the "max-ixfr-ratio" option, which
is a percentage representing the ratio of IXFR size
to the size of the entire zone. This value cannot
exceed 100%, which is the default. [GL #1515]

--- 9.16.11 released ---

5559. [bug] The --with-maxminddb=PATH form of the build-time option
enabling support for libmaxminddb was not working
correctly. This has been fixed. [GL #2366]

5557. [bug] Prevent RBTDB instances from being destroyed by multiple
threads at the same time. [GL #2317]

5556. [bug] Further tweak newline printing in dnssec-signzone and
dnssec-verify. [GL #2359]

5555. [bug] server->reload_status was not properly initialized.
[GL #2361]

5554. [bug] dnssec-signzone and dnssec-verify were missing newlines
between log messages. [GL #2359]

5553. [bug] When reconfiguring named, removing "auto-dnssec" did not
turn off DNSSEC maintenance. [GL #2341]

5552. [func] When switching to "dnssec-policy none;", named now
permits a safe transition to insecure mode and publishes
the CDS and CDNSKEY DELETE records, as described in RFC
8078. [GL #1750]

5551. [bug] named no longer attempts to assign threads to CPUs
outside the CPU affinity set. Thanks to Ole Bj��rn
Hessen. [GL #2245]

5550. [func] dnssec-signzone and named now log a warning when falling
back to the "increment" SOA serial method. [GL #2058]

5545. [func] OS support for load-balanced sockets is no longer
required to receive incoming queries in multiple netmgr
threads. [GL #2137]

5543. [bug] Fix UDP performance issues caused by making netmgr
callbacks asynchronous-only. [GL #2320]

5542. [bug] Refactor netmgr. [GL #1920] [GL #2034] [GL #2061]
[GL #2194] [GL #2221] [GL #2266] [GL #2283] [GL #2318]
[GL #2321]

--- 9.16.10 released ---

5544. [func] Restore the default value of "nocookie-udp-size" to 4096
bytes. [GL #2250]

5541. [func] Adjust the "max-recursion-queries" default from 75 to
100. [GL #2305]

5540. [port] Fix building with native PKCS#11 support for AEP Keyper.
[GL #2315]

5539. [bug] Tighten handling of missing DNS COOKIE responses over
UDP by falling back to TCP. [GL #2275]

5538. [func] Add NSEC3 support to KASP. A new option for
"dnssec-policy", "nsec3param", can be used to set the
desired NSEC3 parameters. NSEC3 salt collisions are
automatically prevented during resalting. Salt
generation is now logged with zone context. [GL #1620]

5534. [bug] The CNAME synthesized from a DNAME was incorrectly
followed when the QTYPE was CNAME or ANY. [GL #2280]

--- 9.16.9 released ---

5533. [func] Add the "stale-refresh-time" option, a time window that
starts after a failed lookup, during which a stale RRset
is served directly from cache before a new attempt to
refresh it is made. [GL #2066]

5530. [bug] dnstap did not capture responses to forwarded UPDATE
requests. [GL #2252]

5527. [bug] A NULL pointer dereference occurred when creating an NTA
recheck query failed. [GL #2244]

5525. [bug] Change 5503 inadvertently broke cross-compilation by
replacing a call to AC_LINK_IFELSE() with a call to
AC_RUN_IFELSE() in configure.ac. This has been fixed,
making cross-compilation possible again. [GL #2237]

5523. [bug] The initial lookup in a zone transitioning to/from a
signed state could fail if the DNSKEY RRset was not
found. [GL #2236]

5522. [bug] Fixed a race/NULL dereference in TCPDNS send. [GL #2227]

5520. [bug] Fixed a number of shutdown races, reference counting
errors, and spurious log messages that could occur
in the network manager. [GL #2221]

5518. [bug] Stub zones now work correctly with primary servers using
"minimal-responses yes". [GL #1736]

5517. [bug] Do not treat UV_EOF as a TCP4RecvErr or a TCP6RecvErr.
[GL #2208]

--- 9.16.8 released ---

5516. [func] The default EDNS buffer size has been changed from 4096
to 1232 bytes. [GL #2183]

5515. [func] Add 'rndc dnssec -rollover' command to trigger a manual
rollover for a specific key. [GL #1749]

5514. [bug] Fix KASP expected key size for Ed25519 and Ed448.
[GL #2171]

5513. [doc] The ARM section describing the "rrset-order" statement
was rewritten to make it unambiguous and up-to-date with
the source code. [GL #2139]

5512. [bug] "rrset-order" rules using "order none" were causing
named to crash despite named-checkconf treating them as
valid. [GL #2139]

5511. [bug] 'dig -u +yaml' failed to display timestamps to the
microsecond. [GL #2190]

5510. [bug] Implement the attach/detach semantics for dns_message_t
to fix a data race in accessing an already-destroyed
fctx->rmessage. [GL #2124]

5509. [bug] filter-aaaa: named crashed upon shutdown if it was in
the process of recursing for A RRsets. [GL #1040]

5508. [func] Added new parameter "-expired" for "rndc dumpdb" that
also prints expired RRsets (awaiting cleanup) to the
dump file. [GL #1870]

5507. [bug] Named could compute incorrect SIG(0) responses.
[GL #2109]

5506. [bug] Properly handle failed sysconf() calls, so we don't
report invalid memory size. [GL #2166]

5505. [bug] Updating contents of a mixed-case RPZ could cause some
rules to be ignored. [GL #2169]

5503. [bug] Cleaned up reference counting of network manager
handles, now using isc_nmhandle_attach() and _detach()
instead of _ref() and _unref(). [GL #2122]

--- 9.16.7 released ---

5501. [func] Log CDS/CDNSKEY publication. [GL #1748]

5500. [bug] Fix (non-)publication of CDS and CDNSKEY records.
[GL #2103]

5499. [func] Add '-P ds' and '-D ds' arguments to dnssec-settime.
[GL #1748]

5497. [bug] 'dig +bufsize=0' failed to disable EDNS. [GL #2054]

5496. [bug] Address a TSAN report by ensuring each rate limiter
object holds a reference to its task. [GL #2081]

5495. [bug] With query minimization enabled, named failed to
resolve ip6.arpa. names that had extra labels to the
left of the IPv6 part. [GL #1847]

5494. [bug] Silence the EPROTO syslog message on older systems.
[GL #1928]

5493. [bug] Fix off-by-one error when calculating new hash table
size. [GL #2104]

5492. [bug] Tighten LOC parsing to reject a period (".") and/or "m"
as a value. Fix handling of negative altitudes which are
not whole meters. [GL #2074]

5491. [bug] rbtversion->glue_table_size could be read without the
appropriate lock being held. [GL #2080]

5489. [bug] Named erroneously accepted certain invalid resource
records that were incorrectly processed after
subsequently being written to disk and loaded back, as
the wire format differed. Such records include: CERT,
IPSECKEY, NSEC3, NSEC3PARAM, NXT, SIG, TLSA, WKS, and
X25. [GL !3953]

5488. [bug] NTA code needed to have a weak reference on its
associated view to prevent the latter from being deleted
while NTA tests were being performed. [GL #2067]

5486. [func] Add 'rndc dnssec -checkds' command, which signals to
named that the DS record for a given zone or key has
been updated in the parent zone. [GL #1613]

--- 9.16.6 released ---

5484. [func] Expire zero TTL records quickly rather than using them
for stale answers. [GL #1829]

5483. [func] A new configuration option "stale-cache-enable" has been
introduced to enable or disable keeping stale answers in
cache. [GL #1712]

5482. [bug] If the Duplicate Address Detection (DAD) mechanism had
not yet finished after adding a new IPv6 address to the
system, BIND 9 would fail to bind to IPv6 addresses in a
tentative state. [GL #2038]

5481. [security] "update-policy" rules of type "subdomain" were
incorrectly treated as "zonesub" rules, which allowed
keys used in "subdomain" rules to update names outside
of the specified subdomains. The problem was fixed by
making sure "subdomain" rules are again processed as
described in the ARM. (CVE-2020-8624) [GL #2055]

5480. [security] When BIND 9 was compiled with native PKCS#11 support, it
was possible to trigger an assertion failure in code
determining the number of bits in the PKCS#11 RSA public
key with a specially crafted packet. (CVE-2020-8623)
[GL #2037]

5479. [security] named could crash in certain query resolution scenarios
where QNAME minimization and forwarding were both
enabled. (CVE-2020-8621) [GL #1997]

5478. [security] It was possible to trigger an assertion failure by
sending a specially crafted large TCP DNS message.
(CVE-2020-8620) [GL #1996]

5477. [bug] The idle timeout for connected TCP sockets, which was
previously set to a high fixed value, is now derived
from the client query processing timeout configured for
a resolver. [GL #2024]

5476. [security] It was possible to trigger an assertion failure when
verifying the response to a TSIG-signed request.
(CVE-2020-8622) [GL #2028]

5475. [bug] Wildcard RPZ passthru rules could incorrectly be
overridden by other rules that were loaded from RPZ
zones which appeared later in the "response-policy"
statement. This has been fixed. [GL #1619]

5474. [bug] dns_rdata_hip_next() failed to return ISC_R_NOMORE
when it should have. [GL !3880]

5473. [func] The RBT hash table implementation has been changed
to use a faster hash function (HalfSipHash2-4) and
Fibonacci hashing for better distribution. Setting
"max-cache-size" now preallocates a fixed-size hash
table so that rehashing does not cause resolution
brownouts while the hash table is grown. [GL #1775]

5471. [bug] The introduction of KASP support inadvertently caused
the second field of "sig-validity-interval" to always be
calculated in hours, even in cases when it should have
been calculated in days. This has been fixed. (Thanks to
Tony Finch.) [GL !3735]

5469. [port] On illumos, a constant called SEC is already defined in
<sys/time.h>, which conflicts with an identically named
constant in libbind9. This conflict has been resolved.
[GL #1993]

5468. [bug] Addressed potential double unlock in process_fd().
[GL #2005]

5466. [bug] Addressed an error in recursive clients stats reporting.
[GL #1719]

5465. [func] Added fallback to built-in trust-anchors, managed-keys,
or trusted-keys if the bindkeys-file (bind.keys) cannot
be parsed. [GL #1235]

5464. [bug] Requesting more than 128 files to be saved when rolling
dnstap log files caused a buffer overflow. This has been
fixed. [GL #1989]

5462. [bug] Move LMDB locking from LMDB itself to named. [GL #1976]

5461. [bug] The STALE rdataset header attribute was updated while
the write lock was not being held, leading to incorrect
statistics. The header attributes are now converted to
use atomic operations. [GL #1475]

--- 9.16.5 released ---

5458. [bug] Prevent a theoretically possible NULL dereference caused
by a data race between zone_maintenance() and
dns_zone_setview_helper(). [GL #1627]

5455. [bug] named could crash when cleaning dead nodes in
lib/dns/rbtdb.c that were being reused. [GL #1968]

5454. [bug] Address a startup crash that occurred when the server
was under load and the root zone had not yet been
loaded. [GL #1862]

5453. [bug] named crashed on shutdown when a new rndc connection was
received during shutdown. [GL #1747]

5452. [bug] The "blackhole" ACL was accidentally disabled for client
queries. [GL #1936]

5451. [func] Add 'rndc dnssec -status' command. [GL #1612]

5449. [bug] Fix a socket shutdown race in netmgr udp. [GL #1938]

5448. [bug] Fix a race condition in isc__nm_tcpdns_send().
[GL #1937]

5447. [bug] IPv6 addresses ending in "::" could break YAML
parsing. A "0" is now appended to such addresses
in YAML output from dig, mdig, delv, and dnstap-read.
[GL #1952]

5446. [bug] The validator could fail to accept a properly signed
RRset if an unsupported algorithm appeared earlier in
the DNSKEY RRset than a supported algorithm. It could
also stop if it detected a malformed public key.
[GL #1689]

5444. [bug] 'rndc dnstap -roll <value>' did not limit the number of
saved files to <value>. [GL !3728]

5443. [bug] The "primary" and "secondary" keywords, when used
as parameters for "check-names", were not
processed correctly and were being ignored. [GL #1949]

5441. [bug] ${LMDB_CFLAGS} was missing from make/includes.in.
[GL #1955]

5440. [test] Properly handle missing kyua. [GL #1950]

5439. [bug] The DS RRset returned by dns_keynode_dsset() was used in
a non-thread-safe manner. [GL #1926]

--- 9.16.4 released ---

5438. [bug] Fix a race in TCP accepting code. [GL #1930]

5437. [bug] Fix a data race in lib/dns/resolver.c:log_formerr().
[GL #1808]

5436. [security] It was possible to trigger an INSIST when determining
whether a record would fit into a TCP message buffer.
(CVE-2020-8618) [GL #1850]

5435. [tests] Add RFC 4592 responses examples to the wildcard system
test. [GL #1718]

5434. [security] It was possible to trigger an INSIST in
lib/dns/rbtdb.c:new_reference() with a particular zone
content and query patterns. (CVE-2020-8619) [GL #1111]
[GL #1718]

5431. [func] Reject DS records at the zone apex when loading
master files. Log but otherwise ignore attempts to
add DS records at the zone apex via UPDATE. [GL #1798]

5430. [doc] Update docs - with netmgr, a separate listening socket
is created for each IPv6 interface (just as with IPv4).
[GL #1782]

5428. [bug] Clean up GSSAPI resources in nsupdate only after taskmgr
has been destroyed. Thanks to Petr Men����k. [GL !3316]

5426. [bug] Don't abort() when setting SO_INCOMING_CPU on the socket
fails. [GL #1911]

5425. [func] The default value of "max-stale-ttl" has been changed
from 1 week to 12 hours. [GL #1877]

5424. [bug] With KASP, when creating a successor key, the "goal"
state of the current active key (predecessor) was not
changed and thus never removed from the zone. [GL #1846]

5423. [bug] Fix a bug in keymgr_key_has_successor(): it incorrectly
returned true if any other key in the keyring had a
successor. [GL #1845]

5422. [bug] When using dnssec-policy, print correct key timing
metadata. [GL #1843]

5421. [bug] Fix a race that could cause named to crash when looking
up the nodename of an RBT node if the tree was modified.
[GL #1857]

5420. [bug] Add missing isc_{mutex,conditional}_destroy() calls
that caused a memory leak on FreeBSD. [GL #1893]

5418. [bug] delv failed to parse deprecated trusted-keys-style
trust anchors. [GL #1860]

5416. [bug] Fix a lock order inversion in lib/isc/unix/socket.c.
[GL #1859]

5415. [test] Address race in dnssec system test that led to
test failures. [GL #1852]

5414. [test] Adjust time allowed for journal truncation to occur
in nsupdate system test to avoid test failure.
[GL #1855]

5413. [test] Address race in autosign system test that led to
test failures. [GL #1852]

5412. [bug] 'provide-ixfr no;' failed to return up-to-date responses
when the serial was greater than or equal to the
current serial. [GL #1714]

5411. [cleanup] TCP accept code has been refactored to use a single
accept() and pass the accepted socket to child threads
for processing. [GL !3320]

5409. [performance] When looking up NSEC3 data in a zone database, skip the
check for empty non-terminal nodes; the NSEC3 tree does
not have any. [GL #1834]

5408. [protocol] Print Extended DNS Errors if present in OPT record.
[GL #1835]

5407. [func] Zone timers are now exported via statistics channel.
Thanks to Paul Frieden, Verizon Media. [GL #1232]

5405. [bug] 'named-checkconf -p' could include spurious text in
server-addresses statements due to an uninitialized DSCP
value. [GL #1812]

Import bind-9.16.20

--- 9.16.20 released ---

5689. [security] An assertion failure occurred when named attempted to
send a UDP packet that exceeded the MTU size, if
Response Rate Limiting (RRL) was enabled.
(CVE-2021-25218) [GL #2856]

5688. [bug] Zones using KASP and inline-signed zones failed to apply
changes from the unsigned zone to the signed zone under
certain circumstances. This has been fixed. [GL #2735]

5687. [bug] "rndc reload <zonename>" could trigger a redundant
reload for an inline-signed zone whose zone file was not
modified since the last "rndc reload". This has been
fixed. [GL #2855]

5686. [func] The number of internal data structures allocated for
each zone was reduced. [GL #2829]

5685. [bug] named failed to check the opcode of responses when
performing zone refreshes, stub zone updates, and UPDATE
forwarding. This has been fixed. [GL #2762]

5682. [bug] Some changes to "zone-statistics" settings were not
properly processed by "rndc reconfig". This has been
fixed. [GL #2820]

5681. [func] Relax the checks in the dns_zone_cdscheck() function to
allow CDS and CDNSKEY records in the zone that do not
match an existing DNSKEY record, as long as the
algorithm matches. This allows a clean rollover from one
provider to another in a multi-signer DNSSEC
configuration. [GL #2710]

5679. [func] Thread affinity is no longer set. [GL #2822]

5678. [bug] The "check DS" code failed to release all resources upon
named shutdown when a refresh was in progress. This has
been fixed. [GL #2811]

5672. [bug] Authentication of rndc messages could fail if a
"controls" statement was configured with multiple key
algorithms for the same listener. This has been fixed.
[GL #2756]

--- 9.16.19 released ---

5671. [bug] A race condition could occur where two threads were
competing for the same set of key file locks, leading to
a deadlock. This has been fixed. [GL #2786]

5670. [bug] create_keydata() created an invalid placeholder keydata
record upon a refresh failure, which prevented the
database of managed keys from subsequently being read
back. This has been fixed. [GL #2686]

5669. [func] KASP support was extended with the "check DS" feature.
Zones with "dnssec-policy" and "parental-agents"
configured now check for DS presence and can perform
automatic KSK rollovers. [GL #1126]

5668. [bug] Rescheduling a setnsec3param() task when a zone failed
to load on startup caused a hang on shutdown. This has
been fixed. [GL #2791]

5667. [bug] The configuration-checking code failed to account for
the inheritance rules of the "dnssec-policy" option.
This has been fixed. [GL #2780]

5666. [doc] The safe "edns-udp-size" value was tweaked to match the
probing value from BIND 9.16 for better compatibility.
[GL #2183]

5665. [bug] If nsupdate sends an SOA request and receives a REFUSED
response, it now fails over to the next available
server. [GL #2758]

5664. [func] For UDP messages larger than the path MTU, named now
sends an empty response with the TC (TrunCated) bit set.
In addition, setting the DF (Don't Fragment) flag on
outgoing UDP sockets was re-enabled. [GL #2790]

5662. [bug] Views with recursion disabled are now configured with a
default cache size of 2 MB unless "max-cache-size" is
explicitly set. This prevents cache RBT hash tables from
being needlessly preallocated for such views. [GL #2777]

5661. [bug] Change 5644 inadvertently introduced a deadlock: when
locking the key file mutex for each zone structure in a
different view, the "in-view" logic was not considered.
This has been fixed. [GL #2783]

5658. [bug] Increasing "max-cache-size" for a running named instance
(using "rndc reconfig") did not cause the hash tables
used by cache databases to be grown accordingly. This
has been fixed. [GL #2770]

5655. [bug] Signed, insecure delegation responses prepared by named
either lacked the necessary NSEC records or contained
duplicate NSEC records when both wildcard expansion and
CNAME chaining were required to prepare the response.
This has been fixed. [GL #2759]

5653. [bug] A bug that caused the NSEC3 salt to be changed on every
restart for zones using KASP has been fixed. [GL #2725]

--- 9.16.18 released ---

5660. [bug] The configuration-checking code failed to account for
the inheritance rules of the "key-directory" option.
[GL #2778]

5659. [bug] When preparing DNS responses, named could replace the
letters 'W' (uppercase) and 'w' (lowercase) with '\000'.
This has been fixed. [GL #2779]

--- 9.16.17 released ---

5652. [bug] A copy-and-paste error in change 5584 caused the
IP_DONTFRAG socket option to be enabled instead of
disabled. This has been fixed. [GL #2746]

5651. [func] Refactor zone dumping to be processed asynchronously via
the uv_work_t thread pool API. [GL #2732]

5650. [bug] Prevent a crash that could occur if serve-stale was
enabled and a prefetch was triggered during a query
restart. [GL #2733]

5649. [bug] If a query was answered with stale data on a server with
DNS64 enabled, an assertion could occur if a non-stale
answer arrived afterward. [GL #2731]

5648. [bug] The calculation of the estimated IXFR transaction size
in dns_journal_iter_init() was invalid. [GL #2685]

5644. [bug] Fix a race condition in reading and writing key files
for zones using KASP and configured in multiple views.
[GL #1875]

5643. [cleanup] "make install" no longer creates an empty
${localstatedir}/run directory. [GL #2709]

5642. [bug] Zones which are configured in multiple views with
different values set for "dnssec-policy" and with
identical values set for "key-directory" are now
detected and treated as a configuration error.
[GL #2463]

5641. [bug] Address a potential memory leak in
dst_key_fromnamedfile(). [GL #2689]

5639. [bug] Check that the first and last SOA record of an AXFR are
consistent. [GL #2528]

5638. [bug] Improvements related to network manager/task manager
integration:
- isc_managers_create() and isc_managers_destroy()
functions were added to handle setup and teardown of
netmgr, taskmgr, timermgr, and socketmgr, since these
require a precise order of operations now.
- Event queue processing is now quantized to prevent
infinite looping.
- The netmgr can now be paused from within a netmgr
thread.
- Deadlocks due to a conflict between netmgr's
pause/resume and listen/stoplistening operations were
fixed.
[GL #2654]

5633. [doc] The "inline-signing" option was incorrectly described as
being inherited from the "options"/"view" levels and was
incorrectly accepted at those levels without effect.
This has been fixed. [GL #2536]

5624. [func] Task manager events are now processed inside network
manager loops. The task manager no longer needs its own
set of worker threads, which improves resolver
performance. [GL #2638]

--- 9.16.16 released ---

5637. [func] Change the default value of the "max-ixfr-ratio" option
to "unlimited". [GL #2671]

5636. [bug] named and named-checkconf did not report an error when
multiple zones with the "dnssec-policy" option set were
using the same zone file. This has been fixed.
[GL #2603]

5635. [bug] Journal compaction could fail when a journal with
invalid transaction headers was not detected at startup.
This has been fixed. [GL #2670]

5634. [bug] If "dnssec-policy" was active and a private key file was
temporarily offline during a rekey event, named could
incorrectly introduce replacement keys and break a
signed zone. This has been fixed. [GL #2596]

5633. [doc] The "inline-signing" option was incorrectly described as
being inherited from the "options"/"view" levels and was
incorrectly accepted at those levels without effect.
This has been fixed. [GL #2536]

5632. [func] Add a new built-in KASP, "insecure", which is used to
transition a zone from a signed to an unsigned state.
The existing built-in KASP "none" should no longer be
used to unsign a zone. [GL #2645]

5631. [protocol] Update the implementation of the ZONEMD RR type to match
RFC 8976. [GL #2658]

5630. [func] Treat DNSSEC responses containing NSEC3 records with
iteration counts greater than 150 as insecure.
[GL #2445]

5629. [func] Reduce the maximum supported number of NSEC3 iterations
that can be configured for a zone to 150. [GL #2642]

5627. [bug] RRSIG(SOA) RRsets placed anywhere other than at the zone
apex were triggering infinite resigning loops. This has
been fixed. [GL #2650]

5626. [bug] When generating zone signing keys, KASP now also checks
for key ID conflicts among newly created keys, rather
than just between new and existing ones. [GL #2628]

5625. [bug] A deadlock could occur when multiple "rndc addzone",
"rndc delzone", and/or "rndc modzone" commands were
invoked simultaneously for different zones. This has
been fixed. [GL #2626]

5622. [cleanup] The lib/samples/ directory has been removed, as export
versions of libraries are no longer maintained.
[GL !4835]

5619. [protocol] Implement draft-vandijk-dnsop-nsec-ttl, updating the
protocol such that NSEC(3) TTL values are set to the
minimum of the SOA MINIMUM value or the SOA TTL.
[GL #2347]

5618. [bug] Change 5149 introduced some inconsistencies in the way
record TTLs were presented in cache dumps. These
inconsistencies have been eliminated. [GL #389]
[GL #2289]

--- 9.16.12 released ---

5578. [protocol] Make "check-names" accept A records below "_spf",
"_spf_rate", and "_spf_verify" labels in order to cater
for the "exists" SPF mechanism specified in RFC 7208
section 5.7 and appendix D.1. [GL #2377]

5577. [bug] Fix the "three is a crowd" key rollover bug in KASP by
correctly implementing Equation (2) of the "Flexible and
Robust Key Rollover" paper. [GL #2375]

5575. [bug] When migrating to KASP, BIND 9 considered keys with the
"Inactive" and/or "Delete" timing metadata to be
possible active keys. This has been fixed. [GL #2406]

5572. [bug] Address potential double free in generatexml().
[GL #2420]

5571. [bug] named failed to start when its configuration included a
zone with a non-builtin "allow-update" ACL attached.
[GL #2413]

5570. [bug] Improve performance of the DNSSEC verification code by
reducing the number of repeated calls to
dns_dnssec_keyfromrdata(). [GL #2073]

5569. [bug] Emit useful error message when "rndc retransfer" is
applied to a zone of inappropriate type. [GL #2342]

5568. [bug] Fixed a crash in "dnssec-keyfromlabel" when using ECDSA
keys. [GL #2178]

5567. [bug] Dig now reports unknown dash options while pre-parsing
the options. This prevents "-multi" instead of "+multi"
from reporting memory usage before ending option parsing
with "Invalid option: -lti". [GL #2403]

5566. [func] Add "stale-answer-client-timeout" option, which is the
amount of time a recursive resolver waits before
attempting to answer the query using stale data from
cache. [GL #2247]

5565. [func] The SONAMEs for BIND 9 libraries now include the current
BIND 9 version number, in an effort to tightly couple
internal libraries with a specific release. [GL #2387]

5562. [security] Fix off-by-one bug in ISC SPNEGO implementation.
(CVE-2020-8625) [GL #2354]

5561. [bug] KASP incorrectly set signature validity to the value of
the DNSKEY signature validity. This is now fixed.
[GL #2383]

5560. [func] The default value of "max-stale-ttl" has been changed
from 12 hours to 1 day and the default value of
"stale-answer-ttl" has been changed from 1 second to 30
seconds, following RFC 8767 recommendations. [GL #2248]

5456. [func] Added "primaries" as a synonym for "masters" in
named.conf, and "primary-only" as a synonym for
"master-only" in the parameters to "notify", to bring
terminology up-to-date with RFC 8499. [GL #1948]

5362. [func] Limit the size of IXFR responses so that AXFR will
be used instead if it would be smaller. This is
controlled by the "max-ixfr-ratio" option, which
is a percentage representing the ratio of IXFR size
to the size of the entire zone. This value cannot
exceed 100%, which is the default. [GL #1515]

--- 9.16.11 released ---

5559. [bug] The --with-maxminddb=PATH form of the build-time option
enabling support for libmaxminddb was not working
correctly. This has been fixed. [GL #2366]

5557. [bug] Prevent RBTDB instances from being destroyed by multiple
threads at the same time. [GL #2317]

5556. [bug] Further tweak newline printing in dnssec-signzone and
dnssec-verify. [GL #2359]

5555. [bug] server->reload_status was not properly initialized.
[GL #2361]

5554. [bug] dnssec-signzone and dnssec-verify were missing newlines
between log messages. [GL #2359]

5553. [bug] When reconfiguring named, removing "auto-dnssec" did not
turn off DNSSEC maintenance. [GL #2341]

5552. [func] When switching to "dnssec-policy none;", named now
permits a safe transition to insecure mode and publishes
the CDS and CDNSKEY DELETE records, as described in RFC
8078. [GL #1750]

5551. [bug] named no longer attempts to assign threads to CPUs
outside the CPU affinity set. Thanks to Ole Bj��rn
Hessen. [GL #2245]

5550. [func] dnssec-signzone and named now log a warning when falling
back to the "increment" SOA serial method. [GL #2058]

5545. [func] OS support for load-balanced sockets is no longer
required to receive incoming queries in multiple netmgr
threads. [GL #2137]

5543. [bug] Fix UDP performance issues caused by making netmgr
callbacks asynchronous-only. [GL #2320]

5542. [bug] Refactor netmgr. [GL #1920] [GL #2034] [GL #2061]
[GL #2194] [GL #2221] [GL #2266] [GL #2283] [GL #2318]
[GL #2321]

--- 9.16.10 released ---

5544. [func] Restore the default value of "nocookie-udp-size" to 4096
bytes. [GL #2250]

5541. [func] Adjust the "max-recursion-queries" default from 75 to
100. [GL #2305]

5540. [port] Fix building with native PKCS#11 support for AEP Keyper.
[GL #2315]

5539. [bug] Tighten handling of missing DNS COOKIE responses over
UDP by falling back to TCP. [GL #2275]

5538. [func] Add NSEC3 support to KASP. A new option for
"dnssec-policy", "nsec3param", can be used to set the
desired NSEC3 parameters. NSEC3 salt collisions are
automatically prevented during resalting. Salt
generation is now logged with zone context. [GL #1620]

5534. [bug] The CNAME synthesized from a DNAME was incorrectly
followed when the QTYPE was CNAME or ANY. [GL #2280]

--- 9.16.9 released ---

5533. [func] Add the "stale-refresh-time" option, a time window that
starts after a failed lookup, during which a stale RRset
is served directly from cache before a new attempt to
refresh it is made. [GL #2066]

5530. [bug] dnstap did not capture responses to forwarded UPDATE
requests. [GL #2252]

5527. [bug] A NULL pointer dereference occurred when creating an NTA
recheck query failed. [GL #2244]

5525. [bug] Change 5503 inadvertently broke cross-compilation by
replacing a call to AC_LINK_IFELSE() with a call to
AC_RUN_IFELSE() in configure.ac. This has been fixed,
making cross-compilation possible again. [GL #2237]

5523. [bug] The initial lookup in a zone transitioning to/from a
signed state could fail if the DNSKEY RRset was not
found. [GL #2236]

5522. [bug] Fixed a race/NULL dereference in TCPDNS send. [GL #2227]

5520. [bug] Fixed a number of shutdown races, reference counting
errors, and spurious log messages that could occur
in the network manager. [GL #2221]

5518. [bug] Stub zones now work correctly with primary servers using
"minimal-responses yes". [GL #1736]

5517. [bug] Do not treat UV_EOF as a TCP4RecvErr or a TCP6RecvErr.
[GL #2208]

--- 9.16.8 released ---

5516. [func] The default EDNS buffer size has been changed from 4096
to 1232 bytes. [GL #2183]

5515. [func] Add 'rndc dnssec -rollover' command to trigger a manual
rollover for a specific key. [GL #1749]

5514. [bug] Fix KASP expected key size for Ed25519 and Ed448.
[GL #2171]

5513. [doc] The ARM section describing the "rrset-order" statement
was rewritten to make it unambiguous and up-to-date with
the source code. [GL #2139]

5512. [bug] "rrset-order" rules using "order none" were causing
named to crash despite named-checkconf treating them as
valid. [GL #2139]

5511. [bug] 'dig -u +yaml' failed to display timestamps to the
microsecond. [GL #2190]

5510. [bug] Implement the attach/detach semantics for dns_message_t
to fix a data race in accessing an already-destroyed
fctx->rmessage. [GL #2124]

5509. [bug] filter-aaaa: named crashed upon shutdown if it was in
the process of recursing for A RRsets. [GL #1040]

5508. [func] Added new parameter "-expired" for "rndc dumpdb" that
also prints expired RRsets (awaiting cleanup) to the
dump file. [GL #1870]

5507. [bug] Named could compute incorrect SIG(0) responses.
[GL #2109]

5506. [bug] Properly handle failed sysconf() calls, so we don't
report invalid memory size. [GL #2166]

5505. [bug] Updating contents of a mixed-case RPZ could cause some
rules to be ignored. [GL #2169]

5503. [bug] Cleaned up reference counting of network manager
handles, now using isc_nmhandle_attach() and _detach()
instead of _ref() and _unref(). [GL #2122]

--- 9.16.7 released ---

5501. [func] Log CDS/CDNSKEY publication. [GL #1748]

5500. [bug] Fix (non-)publication of CDS and CDNSKEY records.
[GL #2103]

5499. [func] Add '-P ds' and '-D ds' arguments to dnssec-settime.
[GL #1748]

5497. [bug] 'dig +bufsize=0' failed to disable EDNS. [GL #2054]

5496. [bug] Address a TSAN report by ensuring each rate limiter
object holds a reference to its task. [GL #2081]

5495. [bug] With query minimization enabled, named failed to
resolve ip6.arpa. names that had extra labels to the
left of the IPv6 part. [GL #1847]

5494. [bug] Silence the EPROTO syslog message on older systems.
[GL #1928]

5493. [bug] Fix off-by-one error when calculating new hash table
size. [GL #2104]

5492. [bug] Tighten LOC parsing to reject a period (".") and/or "m"
as a value. Fix handling of negative altitudes which are
not whole meters. [GL #2074]

5491. [bug] rbtversion->glue_table_size could be read without the
appropriate lock being held. [GL #2080]

5489. [bug] Named erroneously accepted certain invalid resource
records that were incorrectly processed after
subsequently being written to disk and loaded back, as
the wire format differed. Such records include: CERT,
IPSECKEY, NSEC3, NSEC3PARAM, NXT, SIG, TLSA, WKS, and
X25. [GL !3953]

5488. [bug] NTA code needed to have a weak reference on its
associated view to prevent the latter from being deleted
while NTA tests were being performed. [GL #2067]

5486. [func] Add 'rndc dnssec -checkds' command, which signals to
named that the DS record for a given zone or key has
been updated in the parent zone. [GL #1613]

--- 9.16.6 released ---

5484. [func] Expire zero TTL records quickly rather than using them
for stale answers. [GL #1829]

5483. [func] A new configuration option "stale-cache-enable" has been
introduced to enable or disable keeping stale answers in
cache. [GL #1712]

5482. [bug] If the Duplicate Address Detection (DAD) mechanism had
not yet finished after adding a new IPv6 address to the
system, BIND 9 would fail to bind to IPv6 addresses in a
tentative state. [GL #2038]

5481. [security] "update-policy" rules of type "subdomain" were
incorrectly treated as "zonesub" rules, which allowed
keys used in "subdomain" rules to update names outside
of the specified subdomains. The problem was fixed by
making sure "subdomain" rules are again processed as
described in the ARM. (CVE-2020-8624) [GL #2055]

5480. [security] When BIND 9 was compiled with native PKCS#11 support, it
was possible to trigger an assertion failure in code
determining the number of bits in the PKCS#11 RSA public
key with a specially crafted packet. (CVE-2020-8623)
[GL #2037]

5479. [security] named could crash in certain query resolution scenarios
where QNAME minimization and forwarding were both
enabled. (CVE-2020-8621) [GL #1997]

5478. [security] It was possible to trigger an assertion failure by
sending a specially crafted large TCP DNS message.
(CVE-2020-8620) [GL #1996]

5477. [bug] The idle timeout for connected TCP sockets, which was
previously set to a high fixed value, is now derived
from the client query processing timeout configured for
a resolver. [GL #2024]

5476. [security] It was possible to trigger an assertion failure when
verifying the response to a TSIG-signed request.
(CVE-2020-8622) [GL #2028]

5475. [bug] Wildcard RPZ passthru rules could incorrectly be
overridden by other rules that were loaded from RPZ
zones which appeared later in the "response-policy"
statement. This has been fixed. [GL #1619]

5474. [bug] dns_rdata_hip_next() failed to return ISC_R_NOMORE
when it should have. [GL !3880]

5473. [func] The RBT hash table implementation has been changed
to use a faster hash function (HalfSipHash2-4) and
Fibonacci hashing for better distribution. Setting
"max-cache-size" now preallocates a fixed-size hash
table so that rehashing does not cause resolution
brownouts while the hash table is grown. [GL #1775]

5471. [bug] The introduction of KASP support inadvertently caused
the second field of "sig-validity-interval" to always be
calculated in hours, even in cases when it should have
been calculated in days. This has been fixed. (Thanks to
Tony Finch.) [GL !3735]

5469. [port] On illumos, a constant called SEC is already defined in
<sys/time.h>, which conflicts with an identically named
constant in libbind9. This conflict has been resolved.
[GL #1993]

5468. [bug] Addressed potential double unlock in process_fd().
[GL #2005]

5466. [bug] Addressed an error in recursive clients stats reporting.
[GL #1719]

5465. [func] Added fallback to built-in trust-anchors, managed-keys,
or trusted-keys if the bindkeys-file (bind.keys) cannot
be parsed. [GL #1235]

5464. [bug] Requesting more than 128 files to be saved when rolling
dnstap log files caused a buffer overflow. This has been
fixed. [GL #1989]

5462. [bug] Move LMDB locking from LMDB itself to named. [GL #1976]

5461. [bug] The STALE rdataset header attribute was updated while
the write lock was not being held, leading to incorrect
statistics. The header attributes are now converted to
use atomic operations. [GL #1475]

--- 9.16.5 released ---

5458. [bug] Prevent a theoretically possible NULL dereference caused
by a data race between zone_maintenance() and
dns_zone_setview_helper(). [GL #1627]

5455. [bug] named could crash when cleaning dead nodes in
lib/dns/rbtdb.c that were being reused. [GL #1968]

5454. [bug] Address a startup crash that occurred when the server
was under load and the root zone had not yet been
loaded. [GL #1862]

5453. [bug] named crashed on shutdown when a new rndc connection was
received during shutdown. [GL #1747]

5452. [bug] The "blackhole" ACL was accidentally disabled for client
queries. [GL #1936]

5451. [func] Add 'rndc dnssec -status' command. [GL #1612]

5449. [bug] Fix a socket shutdown race in netmgr udp. [GL #1938]

5448. [bug] Fix a race condition in isc__nm_tcpdns_send().
[GL #1937]

5447. [bug] IPv6 addresses ending in "::" could break YAML
parsing. A "0" is now appended to such addresses
in YAML output from dig, mdig, delv, and dnstap-read.
[GL #1952]

5446. [bug] The validator could fail to accept a properly signed
RRset if an unsupported algorithm appeared earlier in
the DNSKEY RRset than a supported algorithm. It could
also stop if it detected a malformed public key.
[GL #1689]

5444. [bug] 'rndc dnstap -roll <value>' did not limit the number of
saved files to <value>. [GL !3728]

5443. [bug] The "primary" and "secondary" keywords, when used
as parameters for "check-names", were not
processed correctly and were being ignored. [GL #1949]

5441. [bug] ${LMDB_CFLAGS} was missing from make/includes.in.
[GL #1955]

5440. [test] Properly handle missing kyua. [GL #1950]

5439. [bug] The DS RRset returned by dns_keynode_dsset() was used in
a non-thread-safe manner. [GL #1926]

--- 9.16.4 released ---

5438. [bug] Fix a race in TCP accepting code. [GL #1930]

5437. [bug] Fix a data race in lib/dns/resolver.c:log_formerr().
[GL #1808]

5436. [security] It was possible to trigger an INSIST when determining
whether a record would fit into a TCP message buffer.
(CVE-2020-8618) [GL #1850]

5435. [tests] Add RFC 4592 responses examples to the wildcard system
test. [GL #1718]

5434. [security] It was possible to trigger an INSIST in
lib/dns/rbtdb.c:new_reference() with a particular zone
content and query patterns. (CVE-2020-8619) [GL #1111]
[GL #1718]

5431. [func] Reject DS records at the zone apex when loading
master files. Log but otherwise ignore attempts to
add DS records at the zone apex via UPDATE. [GL #1798]

5430. [doc] Update docs - with netmgr, a separate listening socket
is created for each IPv6 interface (just as with IPv4).
[GL #1782]

5428. [bug] Clean up GSSAPI resources in nsupdate only after taskmgr
has been destroyed. Thanks to Petr Men����k. [GL !3316]

5426. [bug] Don't abort() when setting SO_INCOMING_CPU on the socket
fails. [GL #1911]

5425. [func] The default value of "max-stale-ttl" has been changed
from 1 week to 12 hours. [GL #1877]

5424. [bug] With KASP, when creating a successor key, the "goal"
state of the current active key (predecessor) was not
changed and thus never removed from the zone. [GL #1846]

5423. [bug] Fix a bug in keymgr_key_has_successor(): it incorrectly
returned true if any other key in the keyring had a
successor. [GL #1845]

5422. [bug] When using dnssec-policy, print correct key timing
metadata. [GL #1843]

5421. [bug] Fix a race that could cause named to crash when looking
up the nodename of an RBT node if the tree was modified.
[GL #1857]

5420. [bug] Add missing isc_{mutex,conditional}_destroy() calls
that caused a memory leak on FreeBSD. [GL #1893]

5418. [bug] delv failed to parse deprecated trusted-keys-style
trust anchors. [GL #1860]

5416. [bug] Fix a lock order inversion in lib/isc/unix/socket.c.
[GL #1859]

5415. [test] Address race in dnssec system test that led to
test failures. [GL #1852]

5414. [test] Adjust time allowed for journal truncation to occur
in nsupdate system test to avoid test failure.
[GL #1855]

5413. [test] Address race in autosign system test that led to
test failures. [GL #1852]

5412. [bug] 'provide-ixfr no;' failed to return up-to-date responses
when the serial was greater than or equal to the
current serial. [GL #1714]

5411. [cleanup] TCP accept code has been refactored to use a single
accept() and pass the accepted socket to child threads
for processing. [GL !3320]

5409. [performance] When looking up NSEC3 data in a zone database, skip the
check for empty non-terminal nodes; the NSEC3 tree does
not have any. [GL #1834]

5408. [protocol] Print Extended DNS Errors if present in OPT record.
[GL #1835]

5407. [func] Zone timers are now exported via statistics channel.
Thanks to Paul Frieden, Verizon Media. [GL #1232]

5405. [bug] 'named-checkconf -p' could include spurious text in
server-addresses statements due to an uninitialized DSCP
value. [GL #1812]

--- 9.16.12 released ---

5578. [protocol] Make "check-names" accept A records below "_spf",
"_spf_rate", and "_spf_verify" labels in order to cater
for the "exists" SPF mechanism specified in RFC 7208
section 5.7 and appendix D.1. [GL #2377]

5577. [bug] Fix the "three is a crowd" key rollover bug in KASP by
correctly implementing Equation (2) of the "Flexible and
Robust Key Rollover" paper. [GL #2375]

5575. [bug] When migrating to KASP, BIND 9 considered keys with the
"Inactive" and/or "Delete" timing metadata to be
possible active keys. This has been fixed. [GL #2406]

5572. [bug] Address potential double free in generatexml().
[GL #2420]

5571. [bug] named failed to start when its configuration included a
zone with a non-builtin "allow-update" ACL attached.
[GL #2413]

5570. [bug] Improve performance of the DNSSEC verification code by
reducing the number of repeated calls to
dns_dnssec_keyfromrdata(). [GL #2073]

5569. [bug] Emit useful error message when "rndc retransfer" is
applied to a zone of inappropriate type. [GL #2342]

5568. [bug] Fixed a crash in "dnssec-keyfromlabel" when using ECDSA
keys. [GL #2178]

5567. [bug] Dig now reports unknown dash options while pre-parsing
the options. This prevents "-multi" instead of "+multi"
from reporting memory usage before ending option parsing
with "Invalid option: -lti". [GL #2403]

5566. [func] Add "stale-answer-client-timeout" option, which is the
amount of time a recursive resolver waits before
attempting to answer the query using stale data from
cache. [GL #2247]

5565. [func] The SONAMEs for BIND 9 libraries now include the current
BIND 9 version number, in an effort to tightly couple
internal libraries with a specific release. [GL #2387]

5562. [security] Fix off-by-one bug in ISC SPNEGO implementation.
(CVE-2020-8625) [GL #2354]

5561. [bug] KASP incorrectly set signature validity to the value of
the DNSKEY signature validity. This is now fixed.
[GL #2383]

5560. [func] The default value of "max-stale-ttl" has been changed
from 12 hours to 1 day and the default value of
"stale-answer-ttl" has been changed from 1 second to 30
seconds, following RFC 8767 recommendations. [GL #2248]

5456. [func] Added "primaries" as a synonym for "masters" in
named.conf, and "primary-only" as a synonym for
"master-only" in the parameters to "notify", to bring
terminology up-to-date with RFC 8499. [GL #1948]

5362. [func] Limit the size of IXFR responses so that AXFR will
be used instead if it would be smaller. This is
controlled by the "max-ixfr-ratio" option, which
is a percentage representing the ratio of IXFR size
to the size of the entire zone. This value cannot
exceed 100%, which is the default. [GL #1515]

--- 9.16.11 released ---

5559. [bug] The --with-maxminddb=PATH form of the build-time option
enabling support for libmaxminddb was not working
correctly. This has been fixed. [GL #2366]

5557. [bug] Prevent RBTDB instances from being destroyed by multiple
threads at the same time. [GL #2317]

5556. [bug] Further tweak newline printing in dnssec-signzone and
dnssec-verify. [GL #2359]

5555. [bug] server->reload_status was not properly initialized.
[GL #2361]

5554. [bug] dnssec-signzone and dnssec-verify were missing newlines
between log messages. [GL #2359]

5553. [bug] When reconfiguring named, removing "auto-dnssec" did not
turn off DNSSEC maintenance. [GL #2341]

5552. [func] When switching to "dnssec-policy none;", named now
permits a safe transition to insecure mode and publishes
the CDS and CDNSKEY DELETE records, as described in RFC
8078. [GL #1750]

5551. [bug] named no longer attempts to assign threads to CPUs
outside the CPU affinity set. Thanks to Ole Bj��rn
Hessen. [GL #2245]

5550. [func] dnssec-signzone and named now log a warning when falling
back to the "increment" SOA serial method. [GL #2058]

5545. [func] OS support for load-balanced sockets is no longer
required to receive incoming queries in multiple netmgr
threads. [GL #2137]

5543. [bug] Fix UDP performance issues caused by making netmgr
callbacks asynchronous-only. [GL #2320]

5542. [bug] Refactor netmgr. [GL #1920] [GL #2034] [GL #2061]
[GL #2194] [GL #2221] [GL #2266] [GL #2283] [GL #2318]
[GL #2321]

--- 9.16.10 released ---

5544. [func] Restore the default value of "nocookie-udp-size" to 4096
bytes. [GL #2250]

5541. [func] Adjust the "max-recursion-queries" default from 75 to
100. [GL #2305]

5540. [port] Fix building with native PKCS#11 support for AEP Keyper.
[GL #2315]

5539. [bug] Tighten handling of missing DNS COOKIE responses over
UDP by falling back to TCP. [GL #2275]

5538. [func] Add NSEC3 support to KASP. A new option for
"dnssec-policy", "nsec3param", can be used to set the
desired NSEC3 parameters. NSEC3 salt collisions are
automatically prevented during resalting. Salt
generation is now logged with zone context. [GL #1620]

5534. [bug] The CNAME synthesized from a DNAME was incorrectly
followed when the QTYPE was CNAME or ANY. [GL #2280]

--- 9.16.9 released ---

5533. [func] Add the "stale-refresh-time" option, a time window that
starts after a failed lookup, during which a stale RRset
is served directly from cache before a new attempt to
refresh it is made. [GL #2066]

5530. [bug] dnstap did not capture responses to forwarded UPDATE
requests. [GL #2252]

5527. [bug] A NULL pointer dereference occurred when creating an NTA
recheck query failed. [GL #2244]

5525. [bug] Change 5503 inadvertently broke cross-compilation by
replacing a call to AC_LINK_IFELSE() with a call to
AC_RUN_IFELSE() in configure.ac. This has been fixed,
making cross-compilation possible again. [GL #2237]

5523. [bug] The initial lookup in a zone transitioning to/from a
signed state could fail if the DNSKEY RRset was not
found. [GL #2236]

5522. [bug] Fixed a race/NULL dereference in TCPDNS send. [GL #2227]

5520. [bug] Fixed a number of shutdown races, reference counting
errors, and spurious log messages that could occur
in the network manager. [GL #2221]

5518. [bug] Stub zones now work correctly with primary servers using
"minimal-responses yes". [GL #1736]

5517. [bug] Do not treat UV_EOF as a TCP4RecvErr or a TCP6RecvErr.
[GL #2208]

--- 9.16.8 released ---

5516. [func] The default EDNS buffer size has been changed from 4096
to 1232 bytes. [GL #2183]

5515. [func] Add 'rndc dnssec -rollover' command to trigger a manual
rollover for a specific key. [GL #1749]

5514. [bug] Fix KASP expected key size for Ed25519 and Ed448.
[GL #2171]

5513. [doc] The ARM section describing the "rrset-order" statement
was rewritten to make it unambiguous and up-to-date with
the source code. [GL #2139]

5512. [bug] "rrset-order" rules using "order none" were causing
named to crash despite named-checkconf treating them as
valid. [GL #2139]

5511. [bug] 'dig -u +yaml' failed to display timestamps to the
microsecond. [GL #2190]

5510. [bug] Implement the attach/detach semantics for dns_message_t
to fix a data race in accessing an already-destroyed
fctx->rmessage. [GL #2124]

5509. [bug] filter-aaaa: named crashed upon shutdown if it was in
the process of recursing for A RRsets. [GL #1040]

5508. [func] Added new parameter "-expired" for "rndc dumpdb" that
also prints expired RRsets (awaiting cleanup) to the
dump file. [GL #1870]

5507. [bug] Named could compute incorrect SIG(0) responses.
[GL #2109]

5506. [bug] Properly handle failed sysconf() calls, so we don't
report invalid memory size. [GL #2166]

5505. [bug] Updating contents of a mixed-case RPZ could cause some
rules to be ignored. [GL #2169]

5503. [bug] Cleaned up reference counting of network manager
handles, now using isc_nmhandle_attach() and _detach()
instead of _ref() and _unref(). [GL #2122]

--- 9.16.7 released ---

5501. [func] Log CDS/CDNSKEY publication. [GL #1748]

5500. [bug] Fix (non-)publication of CDS and CDNSKEY records.
[GL #2103]

5499. [func] Add '-P ds' and '-D ds' arguments to dnssec-settime.
[GL #1748]

5497. [bug] 'dig +bufsize=0' failed to disable EDNS. [GL #2054]

5496. [bug] Address a TSAN report by ensuring each rate limiter
object holds a reference to its task. [GL #2081]

5495. [bug] With query minimization enabled, named failed to
resolve ip6.arpa. names that had extra labels to the
left of the IPv6 part. [GL #1847]

5494. [bug] Silence the EPROTO syslog message on older systems.
[GL #1928]

5493. [bug] Fix off-by-one error when calculating new hash table
size. [GL #2104]

5492. [bug] Tighten LOC parsing to reject a period (".") and/or "m"
as a value. Fix handling of negative altitudes which are
not whole meters. [GL #2074]

5491. [bug] rbtversion->glue_table_size could be read without the
appropriate lock being held. [GL #2080]

5489. [bug] Named erroneously accepted certain invalid resource
records that were incorrectly processed after
subsequently being written to disk and loaded back, as
the wire format differed. Such records include: CERT,
IPSECKEY, NSEC3, NSEC3PARAM, NXT, SIG, TLSA, WKS, and
X25. [GL !3953]

5488. [bug] NTA code needed to have a weak reference on its
associated view to prevent the latter from being deleted
while NTA tests were being performed. [GL #2067]

5486. [func] Add 'rndc dnssec -checkds' command, which signals to
named that the DS record for a given zone or key has
been updated in the parent zone. [GL #1613]

--- 9.16.6 released ---

5484. [func] Expire zero TTL records quickly rather than using them
for stale answers. [GL #1829]

5483. [func] A new configuration option "stale-cache-enable" has been
introduced to enable or disable keeping stale answers in
cache. [GL #1712]

5482. [bug] If the Duplicate Address Detection (DAD) mechanism had
not yet finished after adding a new IPv6 address to the
system, BIND 9 would fail to bind to IPv6 addresses in a
tentative state. [GL #2038]

5481. [security] "update-policy" rules of type "subdomain" were
incorrectly treated as "zonesub" rules, which allowed
keys used in "subdomain" rules to update names outside
of the specified subdomains. The problem was fixed by
making sure "subdomain" rules are again processed as
described in the ARM. (CVE-2020-8624) [GL #2055]

5480. [security] When BIND 9 was compiled with native PKCS#11 support, it
was possible to trigger an assertion failure in code
determining the number of bits in the PKCS#11 RSA public
key with a specially crafted packet. (CVE-2020-8623)
[GL #2037]

5479. [security] named could crash in certain query resolution scenarios
where QNAME minimization and forwarding were both
enabled. (CVE-2020-8621) [GL #1997]

5478. [security] It was possible to trigger an assertion failure by
sending a specially crafted large TCP DNS message.
(CVE-2020-8620) [GL #1996]

5477. [bug] The idle timeout for connected TCP sockets, which was
previously set to a high fixed value, is now derived
from the client query processing timeout configured for
a resolver. [GL #2024]

5476. [security] It was possible to trigger an assertion failure when
verifying the response to a TSIG-signed request.
(CVE-2020-8622) [GL #2028]

5475. [bug] Wildcard RPZ passthru rules could incorrectly be
overridden by other rules that were loaded from RPZ
zones which appeared later in the "response-policy"
statement. This has been fixed. [GL #1619]

5474. [bug] dns_rdata_hip_next() failed to return ISC_R_NOMORE
when it should have. [GL !3880]

5473. [func] The RBT hash table implementation has been changed
to use a faster hash function (HalfSipHash2-4) and
Fibonacci hashing for better distribution. Setting
"max-cache-size" now preallocates a fixed-size hash
table so that rehashing does not cause resolution
brownouts while the hash table is grown. [GL #1775]

5471. [bug] The introduction of KASP support inadvertently caused
the second field of "sig-validity-interval" to always be
calculated in hours, even in cases when it should have
been calculated in days. This has been fixed. (Thanks to
Tony Finch.) [GL !3735]

5469. [port] On illumos, a constant called SEC is already defined in
<sys/time.h>, which conflicts with an identically named
constant in libbind9. This conflict has been resolved.
[GL #1993]

5468. [bug] Addressed potential double unlock in process_fd().
[GL #2005]

5466. [bug] Addressed an error in recursive clients stats reporting.
[GL #1719]

5465. [func] Added fallback to built-in trust-anchors, managed-keys,
or trusted-keys if the bindkeys-file (bind.keys) cannot
be parsed. [GL #1235]

5464. [bug] Requesting more than 128 files to be saved when rolling
dnstap log files caused a buffer overflow. This has been
fixed. [GL #1989]

5462. [bug] Move LMDB locking from LMDB itself to named. [GL #1976]

5461. [bug] The STALE rdataset header attribute was updated while
the write lock was not being held, leading to incorrect
statistics. The header attributes are now converted to
use atomic operations. [GL #1475]

--- 9.16.5 released ---

5458. [bug] Prevent a theoretically possible NULL dereference caused
by a data race between zone_maintenance() and
dns_zone_setview_helper(). [GL #1627]

5455. [bug] named could crash when cleaning dead nodes in
lib/dns/rbtdb.c that were being reused. [GL #1968]

5454. [bug] Address a startup crash that occurred when the server
was under load and the root zone had not yet been
loaded. [GL #1862]

5453. [bug] named crashed on shutdown when a new rndc connection was
received during shutdown. [GL #1747]

5452. [bug] The "blackhole" ACL was accidentally disabled for client
queries. [GL #1936]

5451. [func] Add 'rndc dnssec -status' command. [GL #1612]

5449. [bug] Fix a socket shutdown race in netmgr udp. [GL #1938]

5448. [bug] Fix a race condition in isc__nm_tcpdns_send().
[GL #1937]

5447. [bug] IPv6 addresses ending in "::" could break YAML
parsing. A "0" is now appended to such addresses
in YAML output from dig, mdig, delv, and dnstap-read.
[GL #1952]

5446. [bug] The validator could fail to accept a properly signed
RRset if an unsupported algorithm appeared earlier in
the DNSKEY RRset than a supported algorithm. It could
also stop if it detected a malformed public key.
[GL #1689]

5444. [bug] 'rndc dnstap -roll <value>' did not limit the number of
saved files to <value>. [GL !3728]

5443. [bug] The "primary" and "secondary" keywords, when used
as parameters for "check-names", were not
processed correctly and were being ignored. [GL #1949]

5441. [bug] ${LMDB_CFLAGS} was missing from make/includes.in.
[GL #1955]

5440. [test] Properly handle missing kyua. [GL #1950]

5439. [bug] The DS RRset returned by dns_keynode_dsset() was used in
a non-thread-safe manner. [GL #1926]

--- 9.16.4 released ---

5438. [bug] Fix a race in TCP accepting code. [GL #1930]

5437. [bug] Fix a data race in lib/dns/resolver.c:log_formerr().
[GL #1808]

5436. [security] It was possible to trigger an INSIST when determining
whether a record would fit into a TCP message buffer.
(CVE-2020-8618) [GL #1850]

5435. [tests] Add RFC 4592 responses examples to the wildcard system
test. [GL #1718]

5434. [security] It was possible to trigger an INSIST in
lib/dns/rbtdb.c:new_reference() with a particular zone
content and query patterns. (CVE-2020-8619) [GL #1111]
[GL #1718]

5431. [func] Reject DS records at the zone apex when loading
master files. Log but otherwise ignore attempts to
add DS records at the zone apex via UPDATE. [GL #1798]

5430. [doc] Update docs - with netmgr, a separate listening socket
is created for each IPv6 interface (just as with IPv4).
[GL #1782]

5428. [bug] Clean up GSSAPI resources in nsupdate only after taskmgr
has been destroyed. Thanks to Petr Men����k. [GL !3316]

5426. [bug] Don't abort() when setting SO_INCOMING_CPU on the socket
fails. [GL #1911]

5425. [func] The default value of "max-stale-ttl" has been changed
from 1 week to 12 hours. [GL #1877]

5424. [bug] With KASP, when creating a successor key, the "goal"
state of the current active key (predecessor) was not
changed and thus never removed from the zone. [GL #1846]

5423. [bug] Fix a bug in keymgr_key_has_successor(): it incorrectly
returned true if any other key in the keyring had a
successor. [GL #1845]

5422. [bug] When using dnssec-policy, print correct key timing
metadata. [GL #1843]

5421. [bug] Fix a race that could cause named to crash when looking
up the nodename of an RBT node if the tree was modified.
[GL #1857]

5420. [bug] Add missing isc_{mutex,conditional}_destroy() calls
that caused a memory leak on FreeBSD. [GL #1893]

5418. [bug] delv failed to parse deprecated trusted-keys-style
trust anchors. [GL #1860]

5416. [bug] Fix a lock order inversion in lib/isc/unix/socket.c.
[GL #1859]

5415. [test] Address race in dnssec system test that led to
test failures. [GL #1852]

5414. [test] Adjust time allowed for journal truncation to occur
in nsupdate system test to avoid test failure.
[GL #1855]

5413. [test] Address race in autosign system test that led to
test failures. [GL #1852]

5412. [bug] 'provide-ixfr no;' failed to return up-to-date responses
when the serial was greater than or equal to the
current serial. [GL #1714]

5411. [cleanup] TCP accept code has been refactored to use a single
accept() and pass the accepted socket to child threads
for processing. [GL !3320]

5409. [performance] When looking up NSEC3 data in a zone database, skip the
check for empty non-terminal nodes; the NSEC3 tree does
not have any. [GL #1834]

5408. [protocol] Print Extended DNS Errors if present in OPT record.
[GL #1835]

5407. [func] Zone timers are now exported via statistics channel.
Thanks to Paul Frieden, Verizon Media. [GL #1232]

5405. [bug] 'named-checkconf -p' could include spurious text in
server-addresses statements due to an uninitialized DSCP
value. [GL #1812]