256NTP 4.2.8p5
257
258Focus: Security, Bug fixes, enhancements.
259
260Severity: MEDIUM
261
262In addition to bug fixes and enhancements, this release fixes the
263following medium-severity vulnerability:
264
265* Small-step/big-step. Close the panic gate earlier.
266 References: Sec 2956, CVE-2015-5300
267 Affects: All ntp-4 releases up to, but not including 4.2.8p5, and
268 4.3.0 up to, but not including 4.3.78
269 CVSS3: (AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:N/A:L) Base Score: 4.0, MEDIUM
270 Summary: If ntpd is always started with the -g option, which is
271 common and against long-standing recommendation, and if at the
272 moment ntpd is restarted an attacker can immediately respond to
273 enough requests from enough sources trusted by the target, which
274 is difficult and not common, there is a window of opportunity
275 where the attacker can cause ntpd to set the time to an
276 arbitrary value. Similarly, if an attacker is able to respond
277 to enough requests from enough sources trusted by the target,
278 the attacker can cause ntpd to abort and restart, at which
279 point it can tell the target to set the time to an arbitrary
280 value if and only if ntpd was re-started against long-standing
281 recommendation with the -g flag, or if ntpd was not given the
282 -g flag, the attacker can move the target system's time by at
283 most 900 seconds' time per attack.
284 Mitigation:
285 Configure ntpd to get time from multiple sources.
286 Upgrade to 4.2.8p5, or later, from the NTP Project Download
287 Page or the NTP Public Services Project Download Page
288 As we've long documented, only use the -g option to ntpd in
289 cold-start situations.
290 Monitor your ntpd instances.
291 Credit: This weakness was discovered by Aanchal Malhotra,
292 Isaac E. Cohen, and Sharon Goldberg at Boston University.
293
294 NOTE WELL: The -g flag disables the limit check on the panic_gate
295 in ntpd, which is 900 seconds by default. The bug identified by
296 the researchers at Boston University is that the panic_gate
297 check was only re-enabled after the first change to the system
298 clock that was greater than 128 milliseconds, by default. The
299 correct behavior is that the panic_gate check should be
300 re-enabled after any initial time correction.
301
302 If an attacker is able to inject consistent but erroneous time
303 responses to your systems via the network or "over the air",
304 perhaps by spoofing radio, cellphone, or navigation satellite
305 transmissions, they are in a great position to affect your
306 system's clock. There comes a point where your very best
307 defenses include:
308
309 Configure ntpd to get time from multiple sources.
310 Monitor your ntpd instances.
311
312Other fixes:
313
314* Coverity submission process updated from Coverity 5 to Coverity 7.
315 The NTP codebase has been undergoing regular Coverity scans on an
316 ongoing basis since 2006. As part of our recent upgrade from
317 Coverity 5 to Coverity 7, Coverity identified 16 nits in some of
318 the newly-written Unity test programs. These were fixed.
319* [Bug 2829] Clean up pipe_fds in ntpd.c perlinger@ntp.org
320* [Bug 2887] stratum -1 config results as showing value 99
321 - fudge stratum should only accept values [0..16]. perlinger@ntp.org
322* [Bug 2932] Update leapsecond file info in miscopt.html. CWoodbury, HStenn.
323* [Bug 2934] tests/ntpd/t-ntp_scanner.c has a magic constant wired in. HMurray
324* [Bug 2944] errno is not preserved properly in ntpdate after sendto call.
325 - applied patch by Christos Zoulas. perlinger@ntp.org
326* [Bug 2952] Peer associations broken by fix for Bug 2901/CVE-2015-7704.
327* [Bug 2954] Version 4.2.8p4 crashes on startup on some OSes.
328 - fixed data race conditions in threaded DNS worker. perlinger@ntp.org
329 - limit threading warm-up to linux; FreeBSD bombs on it. perlinger@ntp.org
330* [Bug 2957] 'unsigned int' vs 'size_t' format clash. perlinger@ntp.org
331 - accept key file only if there are no parsing errors
332 - fixed size_t/u_int format clash
333 - fixed wrong use of 'strlcpy'
334* [Bug 2958] ntpq: fatal error messages need a final newline. Craig Leres.
335* [Bug 2962] truncation of size_t/ptrdiff_t on 64bit targets. perlinger@ntp.org
336 - fixed several other warnings (cast-alignment, missing const, missing prototypes)
337 - promote use of 'size_t' for values that express a size
338 - use ptr-to-const for read-only arguments
339 - make sure SOCKET values are not truncated (win32-specific)
340 - format string fixes
341* [Bug 2965] Local clock didn't work since 4.2.8p4. Martin Burnicki.
342* [Bug 2967] ntpdate command suffers an assertion failure
343 - fixed ntp_rfc2553.c to return proper address length. perlinger@ntp.org
344* [Bug 2969] Seg fault from ntpq/mrulist when looking at server with
345 lots of clients. perlinger@ntp.org
346* [Bug 2971] ntpq bails on ^C: select fails: Interrupted system call
347 - changed stacked/nested handling of CTRL-C. perlinger@ntp.org
348* Unity cleanup for FreeBSD-6.4. Harlan Stenn.
349* Unity test cleanup. Harlan Stenn.
350* Libevent autoconf pthread fixes for FreeBSD-10. Harlan Stenn.
351* Header cleanup in tests/sandbox/uglydate.c. Harlan Stenn.
352* Header cleanup in tests/libntp/sfptostr.c. Harlan Stenn.
353* Quiet a warning from clang. Harlan Stenn.
354
355---
356NTP 4.2.8p4
357
358Focus: Security, Bug fixes, enhancements.
359
360Severity: MEDIUM
361
362In addition to bug fixes and enhancements, this release fixes the
363following 13 low- and medium-severity vulnerabilities:
364
365* Incomplete vallen (value length) checks in ntp_crypto.c, leading
366 to potential crashes or potential code injection/information leakage.
367
368 References: Sec 2899, Sec 2671, CVE-2015-7691, CVE-2015-7692, CVE-2015-7702
369 Affects: All ntp-4 releases up to, but not including 4.2.8p4,
370 and 4.3.0 up to, but not including 4.3.77
371 CVSS: (AV:N/AC:H/Au:M/C:N/I:N/A:C) Base Score: 4.6
372 Summary: The fix for CVE-2014-9750 was incomplete in that there were
373 certain code paths where a packet with particular autokey operations
374 that contained malicious data was not always being completely
375 validated. Receipt of these packets can cause ntpd to crash.
376 Mitigation:
377 Don't use autokey.
378 Upgrade to 4.2.8p4, or later, from the NTP Project Download
379 Page or the NTP Public Services Project Download Page
380 Monitor your ntpd instances.
381 Credit: This weakness was discovered by Tenable Network Security.
382
383* Clients that receive a KoD should validate the origin timestamp field.
384
385 References: Sec 2901 / CVE-2015-7704, CVE-2015-7705
386 Affects: All ntp-4 releases up to, but not including 4.2.8p4,
387 and 4.3.0 up to, but not including 4.3.77
388 CVSS: (AV:N/AC:M/Au:N/C:N/I:N/A:P) Base Score: 4.3-5.0 at worst
389 Summary: An ntpd client that honors Kiss-of-Death responses will honor
390 KoD messages that have been forged by an attacker, causing it to
391 delay or stop querying its servers for time updates. Also, an
392 attacker can forge packets that claim to be from the target and
393 send them to servers often enough that a server that implements
394 KoD rate limiting will send the target machine a KoD response to
395 attempt to reduce the rate of incoming packets, or it may also
396 trigger a firewall block at the server for packets from the target
397 machine. For either of these attacks to succeed, the attacker must
398 know what servers the target is communicating with. An attacker
399 can be anywhere on the Internet and can frequently learn the
400 identity of the target's time source by sending the target a
401 time query.
402 Mitigation:
403 Implement BCP-38.
404 Upgrade to 4.2.8p4, or later, from the NTP Project Download Page
405 or the NTP Public Services Project Download Page
406 If you can't upgrade, restrict who can query ntpd to learn who
407 its servers are, and what IPs are allowed to ask your system
408 for the time. This mitigation is heavy-handed.
409 Monitor your ntpd instances.
410 Note:
411 4.2.8p4 protects against the first attack. For the second attack,
412 all we can do is warn when it is happening, which we do in 4.2.8p4.
413 Credit: This weakness was discovered by Aanchal Malhotra,
414 Issac E. Cohen, and Sharon Goldberg of Boston University.
415
416* configuration directives to change "pidfile" and "driftfile" should
417 only be allowed locally.
418
419 References: Sec 2902 / CVE-2015-5196
420 Affects: All ntp-4 releases up to, but not including 4.2.8p4,
421 and 4.3.0 up to, but not including 4.3.77
422 CVSS: (AV:N/AC:H/Au:M/C:N/I:C/A:C) Base Score: 6.2 worst case
423 Summary: If ntpd is configured to allow for remote configuration,
424 and if the (possibly spoofed) source IP address is allowed to
425 send remote configuration requests, and if the attacker knows
426 the remote configuration password, it's possible for an attacker
427 to use the "pidfile" or "driftfile" directives to potentially
428 overwrite other files.
429 Mitigation:
430 Implement BCP-38.
431 Upgrade to 4.2.8p4, or later, from the NTP Project Download
432 Page or the NTP Public Services Project Download Page
433 If you cannot upgrade, don't enable remote configuration.
434 If you must enable remote configuration and cannot upgrade,
435 remote configuration of NTF's ntpd requires:
436 - an explicitly configured trustedkey, and you should also
437 configure a controlkey.
438 - access from a permitted IP. You choose the IPs.
439 - authentication. Don't disable it. Practice secure key safety.
440 Monitor your ntpd instances.
441 Credit: This weakness was discovered by Miroslav Lichvar of Red Hat.
442
443* Slow memory leak in CRYPTO_ASSOC
444
445 References: Sec 2909 / CVE-2015-7701
446 Affects: All ntp-4 releases that use autokey up to, but not
447 including 4.2.8p4, and 4.3.0 up to, but not including 4.3.77
448 CVSS: (AV:N/AC:H/Au:M/C:N/I:N/A:C) Base Score: 0.0 best/usual case,
449 4.6 otherwise
450 Summary: If ntpd is configured to use autokey, then an attacker can
451 send packets to ntpd that will, after several days of ongoing
452 attack, cause it to run out of memory.
453 Mitigation:
454 Don't use autokey.
455 Upgrade to 4.2.8p4, or later, from the NTP Project Download
456 Page or the NTP Public Services Project Download Page
457 Monitor your ntpd instances.
458 Credit: This weakness was discovered by Tenable Network Security.
459
460* mode 7 loop counter underrun
461
462 References: Sec 2913 / CVE-2015-7848 / TALOS-CAN-0052
463 Affects: All ntp-4 releases up to, but not including 4.2.8p4,
464 and 4.3.0 up to, but not including 4.3.77
465 CVSS: (AV:N/AC:H/Au:M/C:N/I:N/A:C) Base Score: 4.6
466 Summary: If ntpd is configured to enable mode 7 packets, and if the
467 use of mode 7 packets is not properly protected thru the use of
468 the available mode 7 authentication and restriction mechanisms,
469 and if the (possibly spoofed) source IP address is allowed to
470 send mode 7 queries, then an attacker can send a crafted packet
471 to ntpd that will cause it to crash.
472 Mitigation:
473 Implement BCP-38.
474 Upgrade to 4.2.8p4, or later, from the NTP Project Download
475 Page or the NTP Public Services Project Download Page.
476 If you are unable to upgrade:
477 In ntp-4.2.8, mode 7 is disabled by default. Don't enable it.
478 If you must enable mode 7:
479 configure the use of a requestkey to control who can issue
480 mode 7 requests.
481 configure restrict noquery to further limit mode 7 requests
482 to trusted sources.
483 Monitor your ntpd instances.
484Credit: This weakness was discovered by Aleksandar Nikolic of Cisco Talos.
485
486* memory corruption in password store
487
488 References: Sec 2916 / CVE-2015-7849 / TALOS-CAN-0054
489 Affects: All ntp-4 releases up to, but not including 4.2.8p4, and 4.3.0 up to, but not including 4.3.77
490 CVSS: (AV:N/AC:H/Au:M/C:N/I:C/A:C) Base Score: 6.8, worst case
491 Summary: If ntpd is configured to allow remote configuration, and if
492 the (possibly spoofed) source IP address is allowed to send
493 remote configuration requests, and if the attacker knows the
494 remote configuration password or if ntpd was configured to
495 disable authentication, then an attacker can send a set of
496 packets to ntpd that may cause a crash or theoretically
497 perform a code injection attack.
498 Mitigation:
499 Implement BCP-38.
500 Upgrade to 4.2.8p4, or later, from the NTP Project Download
501 Page or the NTP Public Services Project Download Page.
502 If you are unable to upgrade, remote configuration of NTF's
503 ntpd requires:
504 an explicitly configured "trusted" key. Only configure
505 this if you need it.
506 access from a permitted IP address. You choose the IPs.
507 authentication. Don't disable it. Practice secure key safety.
508 Monitor your ntpd instances.
509 Credit: This weakness was discovered by Yves Younan of Cisco Talos.
510
511* Infinite loop if extended logging enabled and the logfile and
512 keyfile are the same.
513
514 References: Sec 2917 / CVE-2015-7850 / TALOS-CAN-0055
515 Affects: All ntp-4 releases up to, but not including 4.2.8p4,
516 and 4.3.0 up to, but not including 4.3.77
517 CVSS: (AV:N/AC:H/Au:M/C:N/I:N/A:C) Base Score: 4.6, worst case
518 Summary: If ntpd is configured to allow remote configuration, and if
519 the (possibly spoofed) source IP address is allowed to send
520 remote configuration requests, and if the attacker knows the
521 remote configuration password or if ntpd was configured to
522 disable authentication, then an attacker can send a set of
523 packets to ntpd that will cause it to crash and/or create a
524 potentially huge log file. Specifically, the attacker could
525 enable extended logging, point the key file at the log file,
526 and cause what amounts to an infinite loop.
527 Mitigation:
528 Implement BCP-38.
529 Upgrade to 4.2.8p4, or later, from the NTP Project Download
530 Page or the NTP Public Services Project Download Page.
531 If you are unable to upgrade, remote configuration of NTF's ntpd
532 requires:
533 an explicitly configured "trusted" key. Only configure this
534 if you need it.
535 access from a permitted IP address. You choose the IPs.
536 authentication. Don't disable it. Practice secure key safety.
537 Monitor your ntpd instances.
538 Credit: This weakness was discovered by Yves Younan of Cisco Talos.
539
540* Potential path traversal vulnerability in the config file saving of
541 ntpd on VMS.
542
543 References: Sec 2918 / CVE-2015-7851 / TALOS-CAN-0062
544 Affects: All ntp-4 releases running under VMS up to, but not
545 including 4.2.8p4, and 4.3.0 up to, but not including 4.3.77
546 CVSS: (AV:N/AC:H/Au:M/C:N/I:P/A:C) Base Score: 5.2, worst case
547 Summary: If ntpd is configured to allow remote configuration, and if
548 the (possibly spoofed) IP address is allowed to send remote
549 configuration requests, and if the attacker knows the remote
550 configuration password or if ntpd was configured to disable
551 authentication, then an attacker can send a set of packets to
552 ntpd that may cause ntpd to overwrite files.
553 Mitigation:
554 Implement BCP-38.
555 Upgrade to 4.2.8p4, or later, from the NTP Project Download
556 Page or the NTP Public Services Project Download Page.
557 If you are unable to upgrade, remote configuration of NTF's ntpd
558 requires:
559 an explicitly configured "trusted" key. Only configure
560 this if you need it.
561 access from permitted IP addresses. You choose the IPs.
562 authentication. Don't disable it. Practice key security safety.
563 Monitor your ntpd instances.
564 Credit: This weakness was discovered by Yves Younan of Cisco Talos.
565
566* ntpq atoascii() potential memory corruption
567
568 References: Sec 2919 / CVE-2015-7852 / TALOS-CAN-0063
569 Affects: All ntp-4 releases running up to, but not including 4.2.8p4,
570 and 4.3.0 up to, but not including 4.3.77
571 CVSS: (AV:N/AC:H/Au:N/C:N/I:P/A:P) Base Score: 4.0, worst case
572 Summary: If an attacker can figure out the precise moment that ntpq
573 is listening for data and the port number it is listening on or
574 if the attacker can provide a malicious instance ntpd that
575 victims will connect to then an attacker can send a set of
576 crafted mode 6 response packets that, if received by ntpq,
577 can cause ntpq to crash.
578 Mitigation:
579 Implement BCP-38.
580 Upgrade to 4.2.8p4, or later, from the NTP Project Download
581 Page or the NTP Public Services Project Download Page.
582 If you are unable to upgrade and you run ntpq against a server
583 and ntpq crashes, try again using raw mode. Build or get a
584 patched ntpq and see if that fixes the problem. Report new
585 bugs in ntpq or abusive servers appropriately.
586 If you use ntpq in scripts, make sure ntpq does what you expect
587 in your scripts.
588 Credit: This weakness was discovered by Yves Younan and
589 Aleksander Nikolich of Cisco Talos.
590
591* Invalid length data provided by a custom refclock driver could cause
592 a buffer overflow.
593
594 References: Sec 2920 / CVE-2015-7853 / TALOS-CAN-0064
595 Affects: Potentially all ntp-4 releases running up to, but not
596 including 4.2.8p4, and 4.3.0 up to, but not including 4.3.77
597 that have custom refclocks
598 CVSS: (AV:L/AC:H/Au:M/C:C/I:C/A:C) Base Score: 0.0 usual case,
599 5.9 unusual worst case
600 Summary: A negative value for the datalen parameter will overflow a
601 data buffer. NTF's ntpd driver implementations always set this
602 value to 0 and are therefore not vulnerable to this weakness.
603 If you are running a custom refclock driver in ntpd and that
604 driver supplies a negative value for datalen (no custom driver
605 of even minimal competence would do this) then ntpd would
606 overflow a data buffer. It is even hypothetically possible
607 in this case that instead of simply crashing ntpd the attacker
608 could effect a code injection attack.
609 Mitigation:
610 Upgrade to 4.2.8p4, or later, from the NTP Project Download
611 Page or the NTP Public Services Project Download Page.
612 If you are unable to upgrade:
613 If you are running custom refclock drivers, make sure
614 the signed datalen value is either zero or positive.
615 Monitor your ntpd instances.
616 Credit: This weakness was discovered by Yves Younan of Cisco Talos.
617
618* Password Length Memory Corruption Vulnerability
619
620 References: Sec 2921 / CVE-2015-7854 / TALOS-CAN-0065
621 Affects: All ntp-4 releases up to, but not including 4.2.8p4, and
622 4.3.0 up to, but not including 4.3.77
623 CVSS: (AV:N/AC:H/Au:M/C:C/I:C/A:C) Base Score: 0.0 best case,
624 1.7 usual case, 6.8, worst case
625 Summary: If ntpd is configured to allow remote configuration, and if
626 the (possibly spoofed) source IP address is allowed to send
627 remote configuration requests, and if the attacker knows the
628 remote configuration password or if ntpd was (foolishly)
629 configured to disable authentication, then an attacker can
630 send a set of packets to ntpd that may cause it to crash,
631 with the hypothetical possibility of a small code injection.
632 Mitigation:
633 Implement BCP-38.
634 Upgrade to 4.2.8p4, or later, from the NTP Project Download
635 Page or the NTP Public Services Project Download Page.
636 If you are unable to upgrade, remote configuration of NTF's
637 ntpd requires:
638 an explicitly configured "trusted" key. Only configure
639 this if you need it.
640 access from a permitted IP address. You choose the IPs.
641 authentication. Don't disable it. Practice secure key safety.
642 Monitor your ntpd instances.
643 Credit: This weakness was discovered by Yves Younan and
644 Aleksander Nikolich of Cisco Talos.
645
646* decodenetnum() will ASSERT botch instead of returning FAIL on some
647 bogus values.
648
649 References: Sec 2922 / CVE-2015-7855
650 Affects: All ntp-4 releases up to, but not including 4.2.8p4, and
651 4.3.0 up to, but not including 4.3.77
652 CVSS: (AV:N/AC:H/Au:M/C:N/I:N/A:C) Base Score: 4.6, worst case
653 Summary: If ntpd is fed a crafted mode 6 or mode 7 packet containing
654 an unusually long data value where a network address is expected,
655 the decodenetnum() function will abort with an assertion failure
656 instead of simply returning a failure condition.
657 Mitigation:
658 Implement BCP-38.
659 Upgrade to 4.2.8p4, or later, from the NTP Project Download
660 Page or the NTP Public Services Project Download Page.
661 If you are unable to upgrade:
662 mode 7 is disabled by default. Don't enable it.
663 Use restrict noquery to limit who can send mode 6
664 and mode 7 requests.
665 Configure and use the controlkey and requestkey
666 authentication directives to limit who can
667 send mode 6 and mode 7 requests.
668 Monitor your ntpd instances.
669 Credit: This weakness was discovered by John D "Doug" Birdwell of IDA.org.
670
671* NAK to the Future: Symmetric association authentication bypass via
672 crypto-NAK.
673
674 References: Sec 2941 / CVE-2015-7871
675 Affects: All ntp-4 releases between 4.2.5p186 up to but not including
676 4.2.8p4, and 4.3.0 up to but not including 4.3.77
677 CVSS: (AV:N/AC:L/Au:N/C:N/I:P/A:P) Base Score: 6.4
678 Summary: Crypto-NAK packets can be used to cause ntpd to accept time
679 from unauthenticated ephemeral symmetric peers by bypassing the
680 authentication required to mobilize peer associations. This
681 vulnerability appears to have been introduced in ntp-4.2.5p186
682 when the code handling mobilization of new passive symmetric
683 associations (lines 1103-1165) was refactored.
684 Mitigation:
685 Implement BCP-38.
686 Upgrade to 4.2.8p4, or later, from the NTP Project Download
687 Page or the NTP Public Services Project Download Page.
688 If you are unable to upgrade:
689 Apply the patch to the bottom of the "authentic" check
690 block around line 1136 of ntp_proto.c.
691 Monitor your ntpd instances.
692 Credit: This weakness was discovered by Stephen Gray <stepgray@cisco.com>.
693
694Backward-Incompatible changes:
695* [Bug 2817] Default on Linux is now "rlimit memlock -1".
696 While the general default of 32M is still the case, under Linux
697 the default value has been changed to -1 (do not lock ntpd into
698 memory). A value of 0 means "lock ntpd into memory with whatever
699 memory it needs." If your ntp.conf file has an explicit "rlimit memlock"
700 value in it, that value will continue to be used.
701
702* [Bug 2886] Misspelling: "outlyer" should be "outlier".
703 If you've written a script that looks for this case in, say, the
704 output of ntpq, you probably want to change your regex matches
705 from 'outlyer' to 'outl[iy]er'.
706
707New features in this release:
708* 'rlimit memlock' now has finer-grained control. A value of -1 means
709 "don't lock ntpd into memore". This is the default for Linux boxes.
710 A value of 0 means "lock ntpd into memory" with no limits. Otherwise
711 the value is the number of megabytes of memory to lock. The default
712 is 32 megabytes.
713
714* The old Google Test framework has been replaced with a new framework,
715 based on http://www.throwtheswitch.org/unity/ .
716
717Bug Fixes and Improvements:
718* [Bug 2332] (reopened) Exercise thread cancellation once before dropping
719 privileges and limiting resources in NTPD removes the need to link
720 forcefully against 'libgcc_s' which does not always work. J.Perlinger
721* [Bug 2595] ntpdate man page quirks. Hal Murray, Harlan Stenn.
722* [Bug 2625] Deprecate flag1 in local refclock. Hal Murray, Harlan Stenn.
723* [Bug 2817] Stop locking ntpd into memory by default under Linux. H.Stenn.
724* [Bug 2821] minor build issues: fixed refclock_gpsdjson.c. perlinger@ntp.org
725* [Bug 2823] ntpsweep with recursive peers option doesn't work. H.Stenn.
726* [Bug 2849] Systems with more than one default route may never
727 synchronize. Brian Utterback. Note that this patch might need to
728 be reverted once Bug 2043 has been fixed.
729* [Bug 2864] 4.2.8p3 fails to compile on Windows. Juergen Perlinger
730* [Bug 2866] segmentation fault at initgroups(). Harlan Stenn.
731* [Bug 2867] ntpd with autokey active crashed by 'ntpq -crv'. J.Perlinger
732* [Bug 2873] libevent should not include .deps/ in the tarball. H.Stenn
733* [Bug 2874] Don't distribute generated sntp/tests/fileHandlingTest.h. H.Stenn
734* [Bug 2875] sntp/Makefile.am: Get rid of DIST_SUBDIRS. libevent must
735 be configured for the distribution targets. Harlan Stenn.
736* [Bug 2883] ntpd crashes on exit with empty driftfile. Miroslav Lichvar.
737* [Bug 2886] Mis-spelling: "outlyer" should be "outlier". dave@horsfall.org
738* [Bug 2888] streamline calendar functions. perlinger@ntp.org
739* [Bug 2889] ntp-dev-4.3.67 does not build on Windows. perlinger@ntp.org
740* [Bug 2890] Ignore ENOBUFS on routing netlink socket. Konstantin Khlebnikov.
741* [Bug 2906] make check needs better support for pthreads. Harlan Stenn.
742* [Bug 2907] dist* build targets require our libevent/ to be enabled. HStenn.
743* [Bug 2912] no munlockall() under Windows. David Taylor, Harlan Stenn.
744* libntp/emalloc.c: Remove explicit include of stdint.h. Harlan Stenn.
745* Put Unity CPPFLAGS items in unity_config.h. Harlan Stenn.
746* tests/ntpd/g_leapsec.cpp typo fix. Harlan Stenn.
747* Phase 1 deprecation of google test in sntp/tests/. Harlan Stenn.
748* On some versions of HP-UX, inttypes.h does not include stdint.h. H.Stenn.
749* top_srcdir can change based on ntp v. sntp. Harlan Stenn.
750* sntp/tests/ function parameter list cleanup. Damir Tomi��.
751* tests/libntp/ function parameter list cleanup. Damir Tomi��.
752* tests/ntpd/ function parameter list cleanup. Damir Tomi��.
753* sntp/unity/unity_config.h: handle stdint.h. Harlan Stenn.
754* sntp/unity/unity_internals.h: handle *INTPTR_MAX on old Solaris. H.Stenn.
755* tests/libntp/timevalops.c and timespecops.c fixed error printing. D.Tomi��.
756* tests/libntp/ improvements in code and fixed error printing. Damir Tomi��.
757* tests/libntp: a_md5encrypt.c, authkeys.c, buftvtots.c, calendar.c, caljulian.c,
758 caltontp.c, clocktime.c, humandate.c, hextolfp.c, decodenetnum.c - fixed
759 formatting; first declaration, then code (C90); deleted unnecessary comments;
760 changed from sprintf to snprintf; fixed order of includes. Tomasz Flendrich
761* tests/libntp/lfpfunc.c remove unnecessary include, remove old comments,
762 fix formatting, cleanup. Tomasz Flendrich
763* tests/libntp/lfptostr.c remove unnecessary include, add consts, fix formatting.
764 Tomasz Flendrich
765* tests/libntp/statestr.c remove empty functions, remove unnecessary include,
766 fix formatting. Tomasz Flendrich
767* tests/libntp/modetoa.c fixed formatting. Tomasz Flendrich
768* tests/libntp/msyslog.c fixed formatting. Tomasz Flendrich
769* tests/libntp/numtoa.c deleted unnecessary empty functions, fixed formatting.
770 Tomasz Flendrich
771* tests/libntp/numtohost.c added const, fixed formatting. Tomasz Flendrich
772* tests/libntp/refnumtoa.c fixed formatting. Tomasz Flendrich
773* tests/libntp/ssl_init.c fixed formatting. Tomasz Flendrich
774* tests/libntp/tvtots.c fixed a bug, fixed formatting. Tomasz Flendrich
775* tests/libntp/uglydate.c removed an unnecessary include. Tomasz Flendrich
776* tests/libntp/vi64ops.c removed an unnecessary comment, fixed formatting.
777* tests/libntp/ymd3yd.c removed an empty function and an unnecessary include,
778fixed formatting. Tomasz Flendrich
779* tests/libntp/timespecops.c fixed formatting, fixed the order of includes,
780 removed unnecessary comments, cleanup. Tomasz Flendrich
781* tests/libntp/timevalops.c fixed the order of includes, deleted unnecessary
782 comments, cleanup. Tomasz Flendrich
783* tests/libntp/sockaddrtest.h making it agree to NTP's conventions of formatting.
784 Tomasz Flendrich
785* tests/libntp/lfptest.h cleanup. Tomasz Flendrich
786* tests/libntp/test-libntp.c fix formatting. Tomasz Flendrich
787* sntp/tests/crypto.c is now using proper Unity's assertions, fixed formatting.
788 Tomasz Flendrich
789* sntp/tests/kodDatabase.c added consts, deleted empty function,
790 fixed formatting. Tomasz Flendrich
791* sntp/tests/kodFile.c cleanup, fixed formatting. Tomasz Flendrich
792* sntp/tests/packetHandling.c is now using proper Unity's assertions,
793 fixed formatting, deleted unused variable. Tomasz Flendrich
794* sntp/tests/keyFile.c is now using proper Unity's assertions, fixed formatting.
795 Tomasz Flendrich
796* sntp/tests/packetProcessing.c changed from sprintf to snprintf,
797 fixed formatting. Tomasz Flendrich
798* sntp/tests/utilities.c is now using proper Unity's assertions, changed
799 the order of includes, fixed formatting, removed unnecessary comments.
800 Tomasz Flendrich
801* sntp/tests/sntptest.h fixed formatting. Tomasz Flendrich
802* sntp/tests/fileHandlingTest.h.in fixed a possible buffer overflow problem,
803 made one function do its job, deleted unnecessary prints, fixed formatting.
804 Tomasz Flendrich
805* sntp/unity/Makefile.am added a missing header. Tomasz Flendrich
806* sntp/unity/unity_config.h: Distribute it. Harlan Stenn.
807* sntp/libevent/evconfig-private.h: remove generated filefrom SCM. H.Stenn.
808* sntp/unity/Makefile.am: fix some broken paths. Harlan Stenn.
809* sntp/unity/unity.c: Clean up a printf(). Harlan Stenn.
810* Phase 1 deprecation of google test in tests/libntp/. Harlan Stenn.
811* Don't build sntp/libevent/sample/. Harlan Stenn.
812* tests/libntp/test_caltontp needs -lpthread. Harlan Stenn.
813* br-flock: --enable-local-libevent. Harlan Stenn.
814* Wrote tests for ntpd/ntp_prio_q.c. Tomasz Flendrich
815* scripts/lib/NTP/Util.pm: stratum output is version-dependent. Harlan Stenn.
816* Get rid of the NTP_ prefix on our assertion macros. Harlan Stenn.
817* Code cleanup. Harlan Stenn.
818* libntp/icom.c: Typo fix. Harlan Stenn.
819* util/ntptime.c: initialization nit. Harlan Stenn.
820* ntpd/ntp_peer.c:newpeer(): added a DEBUG_REQUIRE(srcadr). Harlan Stenn.
821* Add std_unity_tests to various Makefile.am files. Harlan Stenn.
822* ntpd/ntp_restrict.c: added a few assertions, created tests for this file.
823 Tomasz Flendrich
824* Changed progname to be const in many files - now it's consistent. Tomasz
825 Flendrich
826* Typo fix for GCC warning suppression. Harlan Stenn.
827* Added tests/ntpd/ntp_scanner.c test. Damir Tomi��.
828* Added declarations to all Unity tests, and did minor fixes to them.
829 Reduced the number of warnings by half. Damir Tomi��.
830* Updated generate_test_runner.rb and updated the sntp/unity/auto directory
831 with the latest Unity updates from Mark. Damir Tomi��.
832* Retire google test - phase I. Harlan Stenn.
833* Unity test cleanup: move declaration of 'initializing'. Harlan Stenn.
834* Update the NEWS file. Harlan Stenn.
835* Autoconf cleanup. Harlan Stenn.
836* Unit test dist cleanup. Harlan Stenn.
837* Cleanup various test Makefile.am files. Harlan Stenn.
838* Pthread autoconf macro cleanup. Harlan Stenn.
839* Fix progname definition in unity runner scripts. Harlan Stenn.
840* Clean trailing whitespace in tests/ntpd/Makefile.am. Harlan Stenn.
841* Update the patch for bug 2817. Harlan Stenn.
842* More updates for bug 2817. Harlan Stenn.
843* Fix bugs in tests/ntpd/ntp_prio_q.c. Harlan Stenn.
844* gcc on older HPUX may need +allowdups. Harlan Stenn.
845* Adding missing MCAST protection. Harlan Stenn.
846* Disable certain test programs on certain platforms. Harlan Stenn.
847* Implement --enable-problem-tests (on by default). Harlan Stenn.
848* build system tweaks. Harlan Stenn.
849
850---
851NTP 4.2.8p3 (Harlan Stenn <stenn@ntp.org>, 2015/06/29)
852
853Focus: 1 Security fix. Bug fixes and enhancements. Leap-second improvements.
854
855Severity: MEDIUM
856
857Security Fix:
858
859* [Sec 2853] Crafted remote config packet can crash some versions of
860 ntpd. Aleksis Kauppinen, Juergen Perlinger, Harlan Stenn.
861
862Under specific circumstances an attacker can send a crafted packet to
863cause a vulnerable ntpd instance to crash. This requires each of the
864following to be true:
865
8661) ntpd set up to allow remote configuration (not allowed by default), and
8672) knowledge of the configuration password, and
8683) access to a computer entrusted to perform remote configuration.
869
870This vulnerability is considered low-risk.
871
872New features in this release:
873
874Optional (disabled by default) support to have ntpd provide smeared
875leap second time. A specially built and configured ntpd will only
876offer smeared time in response to client packets. These response
877packets will also contain a "refid" of 254.a.b.c, where the 24 bits
878of a, b, and c encode the amount of smear in a 2:22 integer:fraction
879format. See README.leapsmear and http://bugs.ntp.org/2855 for more
880information.
881
882 *IF YOU CHOOSE TO CONFIGURE NTPD TO PROVIDE LEAP SMEAR TIME*
883 *BE SURE YOU DO NOT OFFER THAT TIME ON PUBLIC TIMESERVERS.*
884
885We've imported the Unity test framework, and have begun converting
886the existing google-test items to this new framework. If you want
887to write new tests or change old ones, you'll need to have ruby
888installed. You don't need ruby to run the test suite.
889
890Bug Fixes and Improvements:
891
892* CID 739725: Fix a rare resource leak in libevent/listener.c.
893* CID 1295478: Quiet a pedantic potential error from the fix for Bug 2776.
894* CID 1296235: Fix refclock_jjy.c and correcting type of the driver40-ja.html
895* CID 1269537: Clean up a line of dead code in getShmTime().
896* [Bug 1060] Buffer overruns in libparse/clk_rawdcf.c. Helge Oldach.
897* [Bug 2590] autogen-5.18.5.
898* [Bug 2612] restrict: Warn when 'monitor' can't be disabled because
899 of 'limited'.
900* [Bug 2650] fix includefile processing.
901* [Bug 2745] ntpd -x steps clock on leap second
902 Fixed an initial-value problem that caused misbehaviour in absence of
903 any leapsecond information.
904 Do leap second stepping only of the step adjustment is beyond the
905 proper jump distance limit and step correction is allowed at all.
906* [Bug 2750] build for Win64
907 Building for 32bit of loopback ppsapi needs def file
908* [Bug 2776] Improve ntpq's 'help keytype'.
909* [Bug 2778] Implement "apeers" ntpq command to include associd.
910* [Bug 2782] Refactor refclock_shm.c, add memory barrier protection.
911* [Bug 2792] If the IFF_RUNNING interface flag is supported then an
912 interface is ignored as long as this flag is not set since the
913 interface is not usable (e.g., no link).
914* [Bug 2794] Clean up kernel clock status reports.
915* [Bug 2800] refclock_true.c true_debug() can't open debug log because
916 of incompatible open/fdopen parameters.
917* [Bug 2804] install-local-data assumes GNU 'find' semantics.
918* [Bug 2805] ntpd fails to join multicast group.
919* [Bug 2806] refclock_jjy.c supports the Telephone JJY.
920* [Bug 2808] GPSD_JSON driver enhancements, step 1.
921 Fix crash during cleanup if GPS device not present and char device.
922 Increase internal token buffer to parse all JSON data, even SKY.
923 Defer logging of errors during driver init until the first unit is
924 started, so the syslog is not cluttered when the driver is not used.
925 Various improvements, see http://bugs.ntp.org/2808 for details.
926 Changed libjsmn to a more recent version.
927* [Bug 2810] refclock_shm.c memory barrier code needs tweaks for QNX.
928* [Bug 2813] HP-UX needs -D__STDC_VERSION__=199901L and limits.h.
929* [Bug 2815] net-snmp before v5.4 has circular library dependencies.
930* [Bug 2821] Add a missing NTP_PRINTF and a missing const.
931* [Bug 2822] New leap column in sntp broke NTP::Util.pm.
932* [Bug 2824] Convert update-leap to perl. (also see 2769)
933* [Bug 2825] Quiet file installation in html/ .
934* [Bug 2830] ntpd doesn't always transfer the correct TAI offset via autokey
935 NTPD transfers the current TAI (instead of an announcement) now.
936 This might still needed improvement.
937 Update autokey data ASAP when 'sys_tai' changes.
938 Fix unit test that was broken by changes for autokey update.
939 Avoid potential signature length issue and use DPRINTF where possible
940 in ntp_crypto.c.
941* [Bug 2832] refclock_jjy.c supports the TDC-300.
942* [Bug 2834] Correct a broken html tag in html/refclock.html
943* [Bug 2836] DFC77 patches from Frank Kardel to make decoding more
944 robust, and require 2 consecutive timestamps to be consistent.
945* [Bug 2837] Allow a configurable DSCP value.
946* [Bug 2837] add test for DSCP to ntpd/complete.conf.in
947* [Bug 2842] Glitch in ntp.conf.def documentation stanza.
948* [Bug 2842] Bug in mdoc2man.
949* [Bug 2843] make check fails on 4.3.36
950 Fixed compiler warnings about numeric range overflow
951 (The original topic was fixed in a byplay to bug#2830)
952* [Bug 2845] Harden memory allocation in ntpd.
953* [Bug 2852] 'make check' can't find unity.h. Hal Murray.
954* [Bug 2854] Missing brace in libntp/strdup.c. Masanari Iida.
955* [Bug 2855] Parser fix for conditional leap smear code. Harlan Stenn.
956* [Bug 2855] Report leap smear in the REFID. Harlan Stenn.
957* [Bug 2855] Implement conditional leap smear code. Martin Burnicki.
958* [Bug 2856] ntpd should wait() on terminated child processes. Paul Green.
959* [Bug 2857] Stratus VOS does not support SIGIO. Paul Green.
960* [Bug 2859] Improve raw DCF77 robustness deconding. Frank Kardel.
961* [Bug 2860] ntpq ifstats sanity check is too stringent. Frank Kardel.
962* html/drivers/driver22.html: typo fix. Harlan Stenn.
963* refidsmear test cleanup. Tomasz Flendrich.
964* refidsmear function support and tests. Harlan Stenn.
965* sntp/tests/Makefile.am: remove g_nameresolution.cpp as it tested
966 something that was only in the 4.2.6 sntp. Harlan Stenn.
967* Modified tests/bug-2803/Makefile.am so it builds Unity framework tests.
968 Damir Tomi��
969* Modified tests/libtnp/Makefile.am so it builds Unity framework tests.
970 Damir Tomi��
971* Modified sntp/tests/Makefile.am so it builds Unity framework tests.
972 Damir Tomi��
973* tests/sandbox/smeartest.c: Harlan Stenn, Damir Tomic, Juergen Perlinger.
974* Converted from gtest to Unity: tests/bug-2803/. Damir Tomi��
975* Converted from gtest to Unity: tests/libntp/ a_md5encrypt, atoint.c,
976 atouint.c, authkeys.c, buftvtots.c, calendar.c, caljulian.c,
977 calyearstart.c, clocktime.c, hextoint.c, lfpfunc.c, modetoa.c,
978 numtoa.c, numtohost.c, refnumtoa.c, ssl_init.c, statestr.c,
979 timespecops.c, timevalops.c, uglydate.c, vi64ops.c, ymd2yd.c.
980 Damir Tomi��
981* Converted from gtest to Unity: sntp/tests/ kodDatabase.c, kodFile.c,
982 networking.c, keyFile.c, utilities.cpp, sntptest.h,
983 fileHandlingTest.h. Damir Tomi��
984* Initial support for experimental leap smear code. Harlan Stenn.
985* Fixes to sntp/tests/fileHandlingTest.h.in. Harlan Stenn.
986* Report select() debug messages at debug level 3 now.
987* sntp/scripts/genLocInfo: treat raspbian as debian.
988* Unity test framework fixes.
989 ** Requires ruby for changes to tests.
990* Initial support for PACKAGE_VERSION tests.
991* sntp/libpkgver belongs in EXTRA_DIST, not DIST_SUBDIRS.
992* tests/bug-2803/Makefile.am must distribute bug-2803.h.
993* Add an assert to the ntpq ifstats code.
994* Clean up the RLIMIT_STACK code.
995* Improve the ntpq documentation around the controlkey keyid.
996* ntpq.c cleanup.
997* Windows port build cleanup.
998
999---
1000NTP 4.2.8p2 (Harlan Stenn <stenn@ntp.org>, 2015/04/07)
1001
1002Focus: Security and Bug fixes, enhancements.
1003
1004Severity: MEDIUM
1005
1006In addition to bug fixes and enhancements, this release fixes the
1007following medium-severity vulnerabilities involving private key
1008authentication:
1009
1010* [Sec 2779] ntpd accepts unauthenticated packets with symmetric key crypto.
1011
1012 References: Sec 2779 / CVE-2015-1798 / VU#374268
1013 Affects: All NTP4 releases starting with ntp-4.2.5p99 up to but not
1014 including ntp-4.2.8p2 where the installation uses symmetric keys
1015 to authenticate remote associations.
1016 CVSS: (AV:A/AC:M/Au:N/C:P/I:P/A:P) Base Score: 5.4
1017 Date Resolved: Stable (4.2.8p2) 07 Apr 2015
1018 Summary: When ntpd is configured to use a symmetric key to authenticate
1019 a remote NTP server/peer, it checks if the NTP message
1020 authentication code (MAC) in received packets is valid, but not if
1021 there actually is any MAC included. Packets without a MAC are
1022 accepted as if they had a valid MAC. This allows a MITM attacker to
1023 send false packets that are accepted by the client/peer without
1024 having to know the symmetric key. The attacker needs to know the
1025 transmit timestamp of the client to match it in the forged reply
1026 and the false reply needs to reach the client before the genuine
1027 reply from the server. The attacker doesn't necessarily need to be
1028 relaying the packets between the client and the server.
1029
1030 Authentication using autokey doesn't have this problem as there is
1031 a check that requires the key ID to be larger than NTP_MAXKEY,
1032 which fails for packets without a MAC.
1033 Mitigation:
1034 Upgrade to 4.2.8p2, or later, from the NTP Project Download Page
1035 or the NTP Public Services Project Download Page
1036 Configure ntpd with enough time sources and monitor it properly.
1037 Credit: This issue was discovered by Miroslav Lichvar, of Red Hat.
1038
1039* [Sec 2781] Authentication doesn't protect symmetric associations against
1040 DoS attacks.
1041
1042 References: Sec 2781 / CVE-2015-1799 / VU#374268
1043 Affects: All NTP releases starting with at least xntp3.3wy up to but
1044 not including ntp-4.2.8p2 where the installation uses symmetric
1045 key authentication.
1046 CVSS: (AV:A/AC:M/Au:N/C:P/I:P/A:P) Base Score: 5.4
1047 Note: the CVSS base Score for this issue could be 4.3 or lower, and
1048 it could be higher than 5.4.
1049 Date Resolved: Stable (4.2.8p2) 07 Apr 2015
1050 Summary: An attacker knowing that NTP hosts A and B are peering with
1051 each other (symmetric association) can send a packet to host A
1052 with source address of B which will set the NTP state variables
1053 on A to the values sent by the attacker. Host A will then send
1054 on its next poll to B a packet with originate timestamp that
1055 doesn't match the transmit timestamp of B and the packet will
1056 be dropped. If the attacker does this periodically for both
1057 hosts, they won't be able to synchronize to each other. This is
1058 a known denial-of-service attack, described at
1059 https://www.eecis.udel.edu/~mills/onwire.html .
1060
1061 According to the document the NTP authentication is supposed to
1062 protect symmetric associations against this attack, but that
1063 doesn't seem to be the case. The state variables are updated even
1064 when authentication fails and the peers are sending packets with
1065 originate timestamps that don't match the transmit timestamps on
1066 the receiving side.
1067
1068 This seems to be a very old problem, dating back to at least
1069 xntp3.3wy. It's also in the NTPv3 (RFC 1305) and NTPv4 (RFC 5905)
1070 specifications, so other NTP implementations with support for
1071 symmetric associations and authentication may be vulnerable too.
1072 An update to the NTP RFC to correct this error is in-process.
1073 Mitigation:
1074 Upgrade to 4.2.8p2, or later, from the NTP Project Download Page
1075 or the NTP Public Services Project Download Page
1076 Note that for users of autokey, this specific style of MITM attack
1077 is simply a long-known potential problem.
1078 Configure ntpd with appropriate time sources and monitor ntpd.
1079 Alert your staff if problems are detected.
1080 Credit: This issue was discovered by Miroslav Lichvar, of Red Hat.
1081
1082* New script: update-leap
1083The update-leap script will verify and if necessary, update the
1084leap-second definition file.
1085It requires the following commands in order to work:
1086
1087 wget logger tr sed shasum
1088
1089Some may choose to run this from cron. It needs more portability testing.
1090
1091Bug Fixes and Improvements:
1092
1093* [Bug 1787] DCF77's formerly "antenna" bit is "call bit" since 2003.
1094* [Bug 1960] setsockopt IPV6_MULTICAST_IF: Invalid argument.
1095* [Bug 2346] "graceful termination" signals do not do peer cleanup.
1096* [Bug 2728] See if C99-style structure initialization works.
1097* [Bug 2747] Upgrade libevent to 2.1.5-beta.
1098* [Bug 2749] ntp/lib/NTP/Util.pm needs update for ntpq -w, IPv6, .POOL. .
1099* [Bug 2751] jitter.h has stale copies of l_fp macros.
1100* [Bug 2756] ntpd hangs in startup with gcc 3.3.5 on ARM.
1101* [Bug 2757] Quiet compiler warnings.
1102* [Bug 2759] Expose nonvolatile/clk_wander_threshold to ntpq.
1103* [Bug 2763] Allow different thresholds for forward and backward steps.
1104* [Bug 2766] ntp-keygen output files should not be world-readable.
1105* [Bug 2767] ntp-keygen -M should symlink to ntp.keys.
1106* [Bug 2771] nonvolatile value is documented in wrong units.
1107* [Bug 2773] Early leap announcement from Palisade/Thunderbolt
1108* [Bug 2774] Unreasonably verbose printout - leap pending/warning
1109* [Bug 2775] ntp-keygen.c fails to compile under Windows.
1110* [Bug 2777] Fixed loops and decoding of Meinberg GPS satellite info.
1111 Removed non-ASCII characters from some copyright comments.
1112 Removed trailing whitespace.
1113 Updated definitions for Meinberg clocks from current Meinberg header files.
1114 Now use C99 fixed-width types and avoid non-ASCII characters in comments.
1115 Account for updated definitions pulled from Meinberg header files.
1116 Updated comments on Meinberg GPS receivers which are not only called GPS16x.
1117 Replaced some constant numbers by defines from ntp_calendar.h
1118 Modified creation of parse-specific variables for Meinberg devices
1119 in gps16x_message().
1120 Reworked mk_utcinfo() to avoid printing of ambiguous leap second dates.
1121 Modified mbg_tm_str() which now expexts an additional parameter controlling
1122 if the time status shall be printed.
1123* [Sec 2779] ntpd accepts unauthenticated packets with symmetric key crypto.
1124* [Sec 2781] Authentication doesn't protect symmetric associations against
1125 DoS attacks.
1126* [Bug 2783] Quiet autoconf warnings about missing AC_LANG_SOURCE.
1127* [Bug 2789] Quiet compiler warnings from libevent.
1128* [Bug 2790] If ntpd sets the Windows MM timer highest resolution
1129 pause briefly before measuring system clock precision to yield
1130 correct results.
1131* Comment from Juergen Perlinger in ntp_calendar.c to make the code clearer.
1132* Use predefined function types for parse driver functions
1133 used to set up function pointers.
1134 Account for changed prototype of parse_inp_fnc_t functions.
1135 Cast parse conversion results to appropriate types to avoid
1136 compiler warnings.
1137 Let ioctl() for Windows accept a (void *) to avoid compiler warnings
1138 when called with pointers to different types.
1139
1140---
1141NTP 4.2.8p1 (Harlan Stenn <stenn@ntp.org>, 2015/02/04)
1142
1143Focus: Security and Bug fixes, enhancements.
1144
1145Severity: HIGH
1146
1147In addition to bug fixes and enhancements, this release fixes the
1148following high-severity vulnerabilities:
1149
1150* vallen is not validated in several places in ntp_crypto.c, leading
1151 to a potential information leak or possibly a crash
1152
1153 References: Sec 2671 / CVE-2014-9297 / VU#852879
1154 Affects: All NTP4 releases before 4.2.8p1 that are running autokey.
1155 CVSS: (AV:N/AC:L/Au:N/C:P/I:P/A:P) Base Score: 7.5
1156 Date Resolved: Stable (4.2.8p1) 04 Feb 2015
1157 Summary: The vallen packet value is not validated in several code
1158 paths in ntp_crypto.c which can lead to information leakage
1159 or perhaps a crash of the ntpd process.
1160 Mitigation - any of:
1161 Upgrade to 4.2.8p1, or later, from the NTP Project Download Page
1162 or the NTP Public Services Project Download Page.
1163 Disable Autokey Authentication by removing, or commenting out,
1164 all configuration directives beginning with the "crypto"
1165 keyword in your ntp.conf file.
1166 Credit: This vulnerability was discovered by Stephen Roettger of the
1167 Google Security Team, with additional cases found by Sebastian
1168 Krahmer of the SUSE Security Team and Harlan Stenn of Network
1169 Time Foundation.
1170
1171* ::1 can be spoofed on some OSes, so ACLs based on IPv6 ::1 addresses
1172 can be bypassed.
1173
1174 References: Sec 2672 / CVE-2014-9298 / VU#852879
1175 Affects: All NTP4 releases before 4.2.8p1, under at least some
1176 versions of MacOS and Linux. *BSD has not been seen to be vulnerable.
1177 CVSS: (AV:N/AC:L/Au:N/C:P/I:P/A:C) Base Score: 9
1178 Date Resolved: Stable (4.2.8p1) 04 Feb 2014
1179 Summary: While available kernels will prevent 127.0.0.1 addresses
1180 from "appearing" on non-localhost IPv4 interfaces, some kernels
1181 do not offer the same protection for ::1 source addresses on
1182 IPv6 interfaces. Since NTP's access control is based on source
1183 address and localhost addresses generally have no restrictions,
1184 an attacker can send malicious control and configuration packets
1185 by spoofing ::1 addresses from the outside. Note Well: This is
1186 not really a bug in NTP, it's a problem with some OSes. If you
1187 have one of these OSes where ::1 can be spoofed, ALL ::1 -based
1188 ACL restrictions on any application can be bypassed!
1189 Mitigation:
1190 Upgrade to 4.2.8p1, or later, from the NTP Project Download Page
1191 or the NTP Public Services Project Download Page
1192 Install firewall rules to block packets claiming to come from
1193 ::1 from inappropriate network interfaces.
1194 Credit: This vulnerability was discovered by Stephen Roettger of
1195 the Google Security Team.
1196
1197Additionally, over 30 bugfixes and improvements were made to the codebase.
1198See the ChangeLog for more information.
1199
1200---
1201NTP 4.2.8 (Harlan Stenn <stenn@ntp.org>, 2014/12/18)
1202
1203Focus: Security and Bug fixes, enhancements.
1204
1205Severity: HIGH
1206
1207In addition to bug fixes and enhancements, this release fixes the
1208following high-severity vulnerabilities:
1209
1210************************** vv NOTE WELL vv *****************************
1211
1212The vulnerabilities listed below can be significantly mitigated by
1213following the BCP of putting
1214
1215 restrict default ... noquery
1216
1217in the ntp.conf file. With the exception of:
1218
1219 receive(): missing return on error
1220 References: Sec 2670 / CVE-2014-9296 / VU#852879
1221
1222below (which is a limited-risk vulnerability), none of the recent
1223vulnerabilities listed below can be exploited if the source IP is
1224restricted from sending a 'query'-class packet by your ntp.conf file.
1225
1226************************** ^^ NOTE WELL ^^ *****************************
1227
1228* Weak default key in config_auth().
1229
1230 References: [Sec 2665] / CVE-2014-9293 / VU#852879
1231 CVSS: (AV:N/AC:L/Au:M/C:P/I:P/A:C) Base Score: 7.3
1232 Vulnerable Versions: all releases prior to 4.2.7p11
1233 Date Resolved: 28 Jan 2010
1234
1235 Summary: If no 'auth' key is set in the configuration file, ntpd
1236 would generate a random key on the fly. There were two
1237 problems with this: 1) the generated key was 31 bits in size,
1238 and 2) it used the (now weak) ntp_random() function, which was
1239 seeded with a 32-bit value and could only provide 32 bits of
1240 entropy. This was sufficient back in the late 1990s when the
1241 code was written. Not today.
1242
1243 Mitigation - any of:
1244 - Upgrade to 4.2.7p11 or later.
1245 - Follow BCP and put 'restrict ... noquery' in your ntp.conf file.
1246
1247 Credit: This vulnerability was noticed in ntp-4.2.6 by Neel Mehta
1248 of the Google Security Team.
1249
1250* Non-cryptographic random number generator with weak seed used by
1251 ntp-keygen to generate symmetric keys.
1252
1253 References: [Sec 2666] / CVE-2014-9294 / VU#852879
1254 CVSS: (AV:N/AC:L/Au:M/C:P/I:P/A:C) Base Score: 7.3
1255 Vulnerable Versions: All NTP4 releases before 4.2.7p230
1256 Date Resolved: Dev (4.2.7p230) 01 Nov 2011
1257
1258 Summary: Prior to ntp-4.2.7p230 ntp-keygen used a weak seed to
1259 prepare a random number generator that was of good quality back
1260 in the late 1990s. The random numbers produced was then used to
1261 generate symmetric keys. In ntp-4.2.8 we use a current-technology
1262 cryptographic random number generator, either RAND_bytes from
1263 OpenSSL, or arc4random().
1264
1265 Mitigation - any of:
1266 - Upgrade to 4.2.7p230 or later.
1267 - Follow BCP and put 'restrict ... noquery' in your ntp.conf file.
1268
1269 Credit: This vulnerability was discovered in ntp-4.2.6 by
1270 Stephen Roettger of the Google Security Team.
1271
1272* Buffer overflow in crypto_recv()
1273
1274 References: Sec 2667 / CVE-2014-9295 / VU#852879
1275 CVSS: (AV:N/AC:L/Au:N/C:P/I:P/A:P) Base Score: 7.5
1276 Versions: All releases before 4.2.8
1277 Date Resolved: Stable (4.2.8) 18 Dec 2014
1278
1279 Summary: When Autokey Authentication is enabled (i.e. the ntp.conf
1280 file contains a 'crypto pw ...' directive) a remote attacker
1281 can send a carefully crafted packet that can overflow a stack
1282 buffer and potentially allow malicious code to be executed
1283 with the privilege level of the ntpd process.
1284
1285 Mitigation - any of:
1286 - Upgrade to 4.2.8, or later, or
1287 - Disable Autokey Authentication by removing, or commenting out,
1288 all configuration directives beginning with the crypto keyword
1289 in your ntp.conf file.
1290
1291 Credit: This vulnerability was discovered by Stephen Roettger of the
1292 Google Security Team.
1293
1294* Buffer overflow in ctl_putdata()
1295
1296 References: Sec 2668 / CVE-2014-9295 / VU#852879
1297 CVSS: (AV:N/AC:L/Au:N/C:P/I:P/A:P) Base Score: 7.5
1298 Versions: All NTP4 releases before 4.2.8
1299 Date Resolved: Stable (4.2.8) 18 Dec 2014
1300
1301 Summary: A remote attacker can send a carefully crafted packet that
1302 can overflow a stack buffer and potentially allow malicious
1303 code to be executed with the privilege level of the ntpd process.
1304
1305 Mitigation - any of:
1306 - Upgrade to 4.2.8, or later.
1307 - Follow BCP and put 'restrict ... noquery' in your ntp.conf file.
1308
1309 Credit: This vulnerability was discovered by Stephen Roettger of the
1310 Google Security Team.
1311
1312* Buffer overflow in configure()
1313
1314 References: Sec 2669 / CVE-2014-9295 / VU#852879
1315 CVSS: (AV:N/AC:L/Au:N/C:P/I:P/A:P) Base Score: 7.5
1316 Versions: All NTP4 releases before 4.2.8
1317 Date Resolved: Stable (4.2.8) 18 Dec 2014
1318
1319 Summary: A remote attacker can send a carefully crafted packet that
1320 can overflow a stack buffer and potentially allow malicious
1321 code to be executed with the privilege level of the ntpd process.
1322
1323 Mitigation - any of:
1324 - Upgrade to 4.2.8, or later.
1325 - Follow BCP and put 'restrict ... noquery' in your ntp.conf file.
1326
1327 Credit: This vulnerability was discovered by Stephen Roettger of the
1328 Google Security Team.
1329
1330* receive(): missing return on error
1331
1332 References: Sec 2670 / CVE-2014-9296 / VU#852879
1333 CVSS: (AV:N/AC:L/Au:N/C:N/I:N/A:P) Base Score: 5.0
1334 Versions: All NTP4 releases before 4.2.8
1335 Date Resolved: Stable (4.2.8) 18 Dec 2014
1336
1337 Summary: Code in ntp_proto.c:receive() was missing a 'return;' in
1338 the code path where an error was detected, which meant
1339 processing did not stop when a specific rare error occurred.
1340 We haven't found a way for this bug to affect system integrity.
1341 If there is no way to affect system integrity the base CVSS
1342 score for this bug is 0. If there is one avenue through which
1343 system integrity can be partially affected, the base score
1344 becomes a 5. If system integrity can be partially affected
1345 via all three integrity metrics, the CVSS base score become 7.5.
1346
1347 Mitigation - any of:
1348 - Upgrade to 4.2.8, or later,
1349 - Remove or comment out all configuration directives
1350 beginning with the crypto keyword in your ntp.conf file.
1351
1352 Credit: This vulnerability was discovered by Stephen Roettger of the
1353 Google Security Team.
1354
1355See http://support.ntp.org/security for more information.
1356
1357New features / changes in this release:
1358
1359Important Changes
1360
1361* Internal NTP Era counters
1362
1363The internal counters that track the "era" (range of years) we are in
1364rolls over every 136 years'. The current "era" started at the stroke of
1365midnight on 1 Jan 1900, and ends just before the stroke of midnight on
13661 Jan 2036.
1367In the past, we have used the "midpoint" of the range to decide which
1368era we were in. Given the longevity of some products, it became clear
1369that it would be more functional to "look back" less, and "look forward"
1370more. We now compile a timestamp into the ntpd executable and when we
1371get a timestamp we us the "built-on" to tell us what era we are in.
1372This check "looks back" 10 years, and "looks forward" 126 years.
1373
1374* ntpdc responses disabled by default
1375
1376Dave Hart writes:
1377
1378For a long time, ntpq and its mostly text-based mode 6 (control)
1379protocol have been preferred over ntpdc and its mode 7 (private
1380request) protocol for runtime queries and configuration. There has
1381been a goal of deprecating ntpdc, previously held back by numerous
1382capabilities exposed by ntpdc with no ntpq equivalent. I have been
1383adding commands to ntpq to cover these cases, and I believe I've
1384covered them all, though I've not compared command-by-command
1385recently.
1386
1387As I've said previously, the binary mode 7 protocol involves a lot of
1388hand-rolled structure layout and byte-swapping code in both ntpd and
1389ntpdc which is hard to get right. As ntpd grows and changes, the
1390changes are difficult to expose via ntpdc while maintaining forward
1391and backward compatibility between ntpdc and ntpd. In contrast,
1392ntpq's text-based, label=value approach involves more code reuse and
1393allows compatible changes without extra work in most cases.
1394
1395Mode 7 has always been defined as vendor/implementation-specific while
1396mode 6 is described in RFC 1305 and intended to be open to interoperate
1397with other implementations. There is an early draft of an updated
1398mode 6 description that likely will join the other NTPv4 RFCs
1399eventually. (http://tools.ietf.org/html/draft-odonoghue-ntpv4-control-01)
1400
1401For these reasons, ntpd 4.2.7p230 by default disables processing of
1402ntpdc queries, reducing ntpd's attack surface and functionally
1403deprecating ntpdc. If you are in the habit of using ntpdc for certain
1404operations, please try the ntpq equivalent. If there's no equivalent,
1405please open a bug report at http://bugs.ntp.org./
1406
1407In addition to the above, over 1100 issues have been resolved between
1408the 4.2.6 branch and 4.2.8. The ChangeLog file in the distribution
1409lists these.
1410
1411---
1412NTP 4.2.6p5 (Harlan Stenn <stenn@ntp.org>, 2011/12/24)
1413
1414Focus: Bug fixes
1415
1416Severity: Medium
1417
1418This is a recommended upgrade.
1419
1420This release updates sys_rootdisp and sys_jitter calculations to match the
1421RFC specification, fixes a potential IPv6 address matching error for the
1422"nic" and "interface" configuration directives, suppresses the creation of
1423extraneous ephemeral associations for certain broadcastclient and
1424multicastclient configurations, cleans up some ntpq display issues, and
1425includes improvements to orphan mode, minor bugs fixes and code clean-ups.
1426
1427New features / changes in this release:
1428
1429ntpd
1430
1431 * Updated "nic" and "interface" IPv6 address handling to prevent
1432 mismatches with localhost [::1] and wildcard [::] which resulted from
1433 using the address/prefix format (e.g. fe80::/64)
1434 * Fix orphan mode stratum incorrectly counting to infinity
1435 * Orphan parent selection metric updated to includes missing ntohl()
1436 * Non-printable stratum 16 refid no longer sent to ntp
1437 * Duplicate ephemeral associations suppressed for broadcastclient and
1438 multicastclient without broadcastdelay
1439 * Exclude undetermined sys_refid from use in loopback TEST12
1440 * Exclude MODE_SERVER responses from KoD rate limiting
1441 * Include root delay in clock_update() sys_rootdisp calculations
1442 * get_systime() updated to exclude sys_residual offset (which only
1443 affected bits "below" sys_tick, the precision threshold)
1444 * sys.peer jitter weighting corrected in sys_jitter calculation
1445
1446ntpq
1447
1448 * -n option extended to include the billboard "server" column
1449 * IPv6 addresses in the local column truncated to prevent overruns
1450
1451---
1452NTP 4.2.6p4 (Harlan Stenn <stenn@ntp.org>, 2011/09/22)
1453
1454Focus: Bug fixes and portability improvements
1455
1456Severity: Medium
1457
1458This is a recommended upgrade.
1459
1460This release includes build infrastructure updates, code
1461clean-ups, minor bug fixes, fixes for a number of minor
1462ref-clock issues, and documentation revisions.
1463
1464Portability improvements affect AIX, HP-UX, Linux, OS X and 64-bit time_t.
1465
1466New features / changes in this release:
1467
1468Build system
1469
1470* Fix checking for struct rtattr
1471* Update config.guess and config.sub for AIX
1472* Upgrade required version of autogen and libopts for building
1473 from our source code repository
1474
1475ntpd
1476
1477* Back-ported several fixes for Coverity warnings from ntp-dev
1478* Fix a rare boundary condition in UNLINK_EXPR_SLIST()
1479* Allow "logconfig =allall" configuration directive
1480* Bind tentative IPv6 addresses on Linux
1481* Correct WWVB/Spectracom driver to timestamp CR instead of LF
1482* Improved tally bit handling to prevent incorrect ntpq peer status reports
1483* Exclude the Undisciplined Local Clock and ACTS drivers from the initial
1484 candidate list unless they are designated a "prefer peer"
1485* Prevent the consideration of Undisciplined Local Clock or ACTS drivers for
1486 selection during the 'tos orphanwait' period
1487* Prefer an Orphan Mode Parent over the Undisciplined Local Clock or ACTS
1488 drivers
1489* Improved support of the Parse Refclock trusttime flag in Meinberg mode
1490* Back-port utility routines from ntp-dev: mprintf(), emalloc_zero()
1491* Added the NTPD_TICKADJ_PPM environment variable for specifying baseline
1492 clock slew on Microsoft Windows
1493* Code cleanup in libntpq
1494
1495ntpdc
1496
1497* Fix timerstats reporting
1498
1499ntpdate
1500
1501* Reduce time required to set clock
1502* Allow a timeout greater than 2 seconds
1503
1504sntp
1505
1506* Backward incompatible command-line option change:
1507 -l/--filelog changed -l/--logfile (to be consistent with ntpd)
1508
1509Documentation
1510
1511* Update html2man. Fix some tags in the .html files
1512* Distribute ntp-wait.html
1513
1514---
1515NTP 4.2.6p3 (Harlan Stenn <stenn@ntp.org>, 2011/01/03)
1516
1517Focus: Bug fixes and portability improvements
1518
1519Severity: Medium
1520
1521This is a recommended upgrade.
1522
1523This release includes build infrastructure updates, code
1524clean-ups, minor bug fixes, fixes for a number of minor
1525ref-clock issues, and documentation revisions.
1526
1527Portability improvements in this release affect AIX, Atari FreeMiNT,
1528FreeBSD4, Linux and Microsoft Windows.
1529
1530New features / changes in this release:
1531
1532Build system
1533* Use lsb_release to get information about Linux distributions.
1534* 'test' is in /usr/bin (instead of /bin) on some systems.
1535* Basic sanity checks for the ChangeLog file.
1536* Source certain build files with ./filename for systems without . in PATH.
1537* IRIX portability fix.
1538* Use a single copy of the "libopts" code.
1539* autogen/libopts upgrade.
1540* configure.ac m4 quoting cleanup.
1541
1542ntpd
1543* Do not bind to IN6_IFF_ANYCAST addresses.
1544* Log the reason for exiting under Windows.
1545* Multicast fixes for Windows.
1546* Interpolation fixes for Windows.
1547* IPv4 and IPv6 Multicast fixes.
1548* Manycast solicitation fixes and general repairs.
1549* JJY refclock cleanup.
1550* NMEA refclock improvements.
1551* Oncore debug message cleanup.
1552* Palisade refclock now builds under Linux.
1553* Give RAWDCF more baud rates.
1554* Support Truetime Satellite clocks under Windows.
1555* Support Arbiter 1093C Satellite clocks under Windows.
1556* Make sure that the "filegen" configuration command defaults to "enable".
1557* Range-check the status codes (plus other cleanup) in the RIPE-NCC driver.
1558* Prohibit 'includefile' directive in remote configuration command.
1559* Fix 'nic' interface bindings.
1560* Fix the way we link with openssl if openssl is installed in the base
1561 system.
1562
1563ntp-keygen
1564* Fix -V coredump.
1565* OpenSSL version display cleanup.
1566
1567ntpdc
1568* Many counters should be treated as unsigned.
1569
1570ntpdate
1571* Do not ignore replies with equal receive and transmit timestamps.
1572
1573ntpq
1574* libntpq warning cleanup.
1575
1576ntpsnmpd
1577* Correct SNMP type for "precision" and "resolution".
1578* Update the MIB from the draft version to RFC-5907.
1579
1580sntp
1581* Display timezone offset when showing time for sntp in the local
1582 timezone.
1583* Pay proper attention to RATE KoD packets.
1584* Fix a miscalculation of the offset.
1585* Properly parse empty lines in the key file.
1586* Logging cleanup.
1587* Use tv_usec correctly in set_time().
1588* Documentation cleanup.
1589
1590---
1591NTP 4.2.6p2 (Harlan Stenn <stenn@ntp.org>, 2010/07/08)
1592
1593Focus: Bug fixes and portability improvements
1594
1595Severity: Medium
1596
1597This is a recommended upgrade.
1598
1599This release includes build infrastructure updates, code
1600clean-ups, minor bug fixes, fixes for a number of minor
1601ref-clock issues, improved KOD handling, OpenSSL related
1602updates and documentation revisions.
1603
1604Portability improvements in this release affect Irix, Linux,
1605Mac OS, Microsoft Windows, OpenBSD and QNX6
1606
1607New features / changes in this release:
1608
1609ntpd
1610* Range syntax for the trustedkey configuration directive
1611* Unified IPv4 and IPv6 restrict lists
1612
1613ntpdate
1614* Rate limiting and KOD handling
1615
1616ntpsnmpd
1617* default connection to net-snmpd via a unix-domain socket
1618* command-line 'socket name' option
1619
1620ntpq / ntpdc
1621* support for the "passwd ..." syntax
1622* key-type specific password prompts
1623
1624sntp
1625* MD5 authentication of an ntpd
1626* Broadcast and crypto
1627* OpenSSL support
1628
1629---
1630NTP 4.2.6p1 (Harlan Stenn <stenn@ntp.org>, 2010/04/09)
1631
1632Focus: Bug fixes, portability fixes, and documentation improvements
1633
1634Severity: Medium
1635
1636This is a recommended upgrade.
1637
1638---
1639NTP 4.2.6 (Harlan Stenn <stenn@ntp.org>, 2009/12/08)
1640
1641Focus: enhancements and bug fixes.
1642
1643---
1644NTP 4.2.4p8 (Harlan Stenn <stenn@ntp.org>, 2009/12/08)
1645
1646Focus: Security Fixes
1647
1648Severity: HIGH
1649
1650This release fixes the following high-severity vulnerability:
1651
1652* [Sec 1331] DoS with mode 7 packets - CVE-2009-3563.
1653
1654 See http://support.ntp.org/security for more information.
1655
1656 NTP mode 7 (MODE_PRIVATE) is used by the ntpdc query and control utility.
1657 In contrast, ntpq uses NTP mode 6 (MODE_CONTROL), while routine NTP time
1658 transfers use modes 1 through 5. Upon receipt of an incorrect mode 7
1659 request or a mode 7 error response from an address which is not listed
1660 in a "restrict ... noquery" or "restrict ... ignore" statement, ntpd will
1661 reply with a mode 7 error response (and log a message). In this case:
1662
1663 * If an attacker spoofs the source address of ntpd host A in a
1664 mode 7 response packet sent to ntpd host B, both A and B will
1665 continuously send each other error responses, for as long as
1666 those packets get through.
1667
1668 * If an attacker spoofs an address of ntpd host A in a mode 7
1669 response packet sent to ntpd host A, A will respond to itself
1670 endlessly, consuming CPU and logging excessively.
1671
1672 Credit for finding this vulnerability goes to Robin Park and Dmitri
1673 Vinokurov of Alcatel-Lucent.
1674
1675THIS IS A STRONGLY RECOMMENDED UPGRADE.
1676
1677---
1678ntpd now syncs to refclocks right away.
1679
1680Backward-Incompatible changes:
1681
1682ntpd no longer accepts '-v name' or '-V name' to define internal variables.
1683Use '--var name' or '--dvar name' instead. (Bug 817)
1684
1685---
1686NTP 4.2.4p7 (Harlan Stenn <stenn@ntp.org>, 2009/05/04)
1687
1688Focus: Security and Bug Fixes
1689
1690Severity: HIGH
1691
1692This release fixes the following high-severity vulnerability:
1693
1694* [Sec 1151] Remote exploit if autokey is enabled. CVE-2009-1252
1695
1696 See http://support.ntp.org/security for more information.
1697
1698 If autokey is enabled (if ntp.conf contains a "crypto pw whatever"
1699 line) then a carefully crafted packet sent to the machine will cause
1700 a buffer overflow and possible execution of injected code, running
1701 with the privileges of the ntpd process (often root).
1702
1703 Credit for finding this vulnerability goes to Chris Ries of CMU.
1704
1705This release fixes the following low-severity vulnerabilities:
1706
1707* [Sec 1144] limited (two byte) buffer overflow in ntpq. CVE-2009-0159
1708 Credit for finding this vulnerability goes to Geoff Keating of Apple.
1709
1710* [Sec 1149] use SO_EXCLUSIVEADDRUSE on Windows
1711 Credit for finding this issue goes to Dave Hart.
1712
1713This release fixes a number of bugs and adds some improvements:
1714
1715* Improved logging
1716* Fix many compiler warnings
1717* Many fixes and improvements for Windows
1718* Adds support for AIX 6.1
1719* Resolves some issues under MacOS X and Solaris
1720
1721THIS IS A STRONGLY RECOMMENDED UPGRADE.
1722
1723---
1724NTP 4.2.4p6 (Harlan Stenn <stenn@ntp.org>, 2009/01/07)
1725
1726Focus: Security Fix
1727
1728Severity: Low
1729
1730This release fixes oCERT.org's CVE-2009-0021, a vulnerability affecting
1731the OpenSSL library relating to the incorrect checking of the return
1732value of EVP_VerifyFinal function.
1733
1734Credit for finding this issue goes to the Google Security Team for
1735finding the original issue with OpenSSL, and to ocert.org for finding
1736the problem in NTP and telling us about it.
1737
1738This is a recommended upgrade.
1739---
1740NTP 4.2.4p5 (Harlan Stenn <stenn@ntp.org>, 2008/08/17)
1741
1742Focus: Minor Bugfixes
1743
1744This release fixes a number of Windows-specific ntpd bugs and
1745platform-independent ntpdate bugs. A logging bugfix has been applied
1746to the ONCORE driver.
1747
1748The "dynamic" keyword and is now obsolete and deferred binding to local
1749interfaces is the new default. The minimum time restriction for the
1750interface update interval has been dropped.
1751
1752A number of minor build system and documentation fixes are included.
1753
1754This is a recommended upgrade for Windows.
1755
1756---
1757NTP 4.2.4p4 (Harlan Stenn <stenn@ntp.org>, 2007/09/10)
1758
1759Focus: Minor Bugfixes
1760
1761This release updates certain copyright information, fixes several display
1762bugs in ntpdc, avoids SIGIO interrupting malloc(), cleans up file descriptor
1763shutdown in the parse refclock driver, removes some lint from the code,
1764stops accessing certain buffers immediately after they were freed, fixes
1765a problem with non-command-line specification of -6, and allows the loopback
1766interface to share addresses with other interfaces.
1767
1768---
1769NTP 4.2.4p3 (Harlan Stenn <stenn@ntp.org>, 2007/06/29)
1770
1771Focus: Minor Bugfixes
1772
1773This release fixes a bug in Windows that made it difficult to
1774terminate ntpd under windows.
1775This is a recommended upgrade for Windows.
1776
1777---
1778NTP 4.2.4p2 (Harlan Stenn <stenn@ntp.org>, 2007/06/19)
1779
1780Focus: Minor Bugfixes
1781
1782This release fixes a multicast mode authentication problem,
1783an error in NTP packet handling on Windows that could lead to
1784ntpd crashing, and several other minor bugs. Handling of
1785multicast interfaces and logging configuration were improved.
1786The required versions of autogen and libopts were incremented.
1787This is a recommended upgrade for Windows and multicast users.
1788
1789---
1790NTP 4.2.4 (Harlan Stenn <stenn@ntp.org>, 2006/12/31)
1791
1792Focus: enhancements and bug fixes.
1793
1794Dynamic interface rescanning was added to simplify the use of ntpd in
1795conjunction with DHCP. GNU AutoGen is used for its command-line options
1796processing. Separate PPS devices are supported for PARSE refclocks, MD5
1797signatures are now provided for the release files. Drivers have been
1798added for some new ref-clocks and have been removed for some older
1799ref-clocks. This release also includes other improvements, documentation
1800and bug fixes.
1801
1802K&R C is no longer supported as of NTP-4.2.4. We are now aiming for ANSI
1803C support.
1804
1805---
1806NTP 4.2.0 (Harlan Stenn <stenn@ntp.org>, 2003/10/15)
1807
1808Focus: enhancements and bug fixes.
|