1#!/bin/sh - 2# 3# $NetBSD: security,v 1.131 2023/07/05 12:07:21 martin Exp $ 4# from: @(#)security 8.1 (Berkeley) 6/9/93 5# 6 7PATH=/sbin:/usr/sbin:/bin:/usr/bin 8 9rcvar_manpage='security.conf(5)' 10 11if [ -f /etc/rc.subr ]; then 12 . /etc/rc.subr 13else 14 echo "Can't read /etc/rc.subr; aborting." 15 exit 1; 16fi 17 18umask 077 19TZ=UTC; export TZ 20 21if [ -s /etc/security.conf ]; then 22 . /etc/security.conf 23fi 24if [ -s /etc/pkgpath.conf ]; then 25 . /etc/pkgpath.conf 26fi 27 28# Set reasonable defaults (if they're not set in security.conf) 29# 30backup_dir=${backup_dir:-/var/backups} 31max_loginlen=${max_loginlen:-8} 32max_grouplen=${max_grouplen:-8} 33pkg_admin=${pkg_admin:-/usr/sbin/pkg_admin} 34pkg_info=${pkg_info:-/usr/sbin/pkg_info} 35 36# Other configurable variables 37# 38special_files="/etc/mtree/special /etc/mtree/special.local" 39MP=/etc/master.passwd 40CHANGELIST="" 41work_dir=$backup_dir/work 42 43if [ ! -d "$work_dir" ]; then 44 mkdir -p "$work_dir" 45fi 46 47SECUREDIR=$(mktemp -d -t _securedir) || exit 1 48 49trap "/bin/rm -rf $SECUREDIR ; exit 0" EXIT INT QUIT PIPE 50 51if ! cd "$SECUREDIR"; then 52 echo "Can not cd to $SECUREDIR". 53 exit 1 54fi 55 56ERR=err.$$ 57TMP1=tmp1.$$ 58TMP2=tmp2.$$ 59MPBYUID=mpbyuid.$$ 60MPBYPATH=mpbypath.$$ 61LIST=list.$$ 62OUTPUT=output.$$ 63LABELS=labels.$$ 64LVM_LABELS=lvm.$$ 65PKGS=pkgs.$$ 66CHANGEFILES=changefiles.$$ 67SPECIALSPEC=specialspec.$$ 68 69if [ -n "${pkgdb_dir}" ]; then 70 echo "WARNING: Setting pkgdb_dir in security.conf(5) is deprecated" 71 echo "WARNING: Please define PKG_DBDIR in pkg_install.conf(5) instead" 72 _compat_K_flag="-K ${pkgdb_dir}" 73fi 74 75have_pkgs() { 76 $pkg_info ${_compat_K_flag} -q -E '*' 77} 78 79# migrate_file old new 80# Determine if the "${old}" path name needs to be migrated to the 81# "${new}" path. Also checks if "${old}.current" needs migrating, 82# and if so, migrate it and possibly "${old}.current,v" and 83# "${old}.backup". 84# 85migrate_file() 86{ 87 _old=$1 88 _new=$2 89 if [ -z "$_old" ] || [ -z "$_new" ]; then 90 err 3 "USAGE: migrate_file old new" 91 fi 92 if [ ! -d "${_new%/*}" ]; then 93 mkdir -p "${_new%/*}" 94 fi 95 if [ -f "${_old}" ] && ! [ -f "${_new}" ]; then 96 echo "==> migrating ${_old}" 97 echo " to ${_new}" 98 mv "${_old}" "${_new}" 99 fi 100 if [ -f "${_old}.current" ] && ! [ -f "${_new}.current" ]; then 101 echo "==> migrating ${_old}.current" 102 echo " to ${_new}.current" 103 mv "${_old}.current" "${_new}.current" 104 if [ -f "${_old}.current,v" ] && 105 ! [ -f "${_new}.current,v" ]; then 106 echo "==> migrating ${_old}.current,v" 107 echo " to ${_new}.current,v" 108 mv "${_old}.current,v" "${_new}.current,v" 109 fi 110 if [ -f "${_old}.backup" ] && ! [ -f "${_new}.backup" ]; then 111 echo "==> migrating ${_old}.backup" 112 echo " to ${_new}.backup" 113 mv "${_old}.backup" "${_new}.backup" 114 fi 115 fi 116} 117 118 119# backup_and_diff file printdiff 120# Determine if file needs backing up, and if so, do it. 121# If printdiff is yes, display the diffs, otherwise 122# just print a message saying "[changes omitted]". 123# 124backup_and_diff() 125{ 126 _file=$1 127 _printdiff=$2 128 if [ -z "$_file" ] || [ -z "$_printdiff" ]; then 129 err 3 "USAGE: backup_and_diff file printdiff" 130 fi 131 ! checkyesno _printdiff 132 _printdiff=$? 133 134 _old=$backup_dir/${_file##*/} 135 case "$_file" in 136 $work_dir/*) 137 _new=$_file 138 migrate_file "$backup_dir/$_old" "$_new" 139 migrate_file "$_old" "$_new" 140 ;; 141 *) 142 _new=$backup_dir/$_file 143 migrate_file "$_old" "$_new" 144 ;; 145 esac 146 CUR=${_new}.current 147 BACK=${_new}.backup 148 if [ -f $_file ]; then 149 if [ -f $CUR ] ; then 150 if [ "$_printdiff" -ne 0 ]; then 151 diff ${diff_options} $CUR $_file > $OUTPUT 152 else 153 if ! cmp -s $CUR $_file; then 154 echo "[changes omitted]" 155 fi > $OUTPUT 156 fi 157 if [ -s $OUTPUT ] ; then 158 printf \ 159 "\n======\n%s diffs (OLD < > NEW)\n======\n" $_file 160 cat $OUTPUT 161 backup_file update $_file $CUR $BACK 162 fi 163 else 164 printf "\n======\n%s added\n======\n" $_file 165 if [ "$_printdiff" -ne 0 ]; then 166 diff ${diff_options} /dev/null $_file 167 else 168 echo "[changes omitted]" 169 fi 170 backup_file add $_file $CUR $BACK 171 fi 172 else 173 if [ -f $CUR ]; then 174 printf "\n======\n%s removed\n======\n" $_file 175 if [ "$_printdiff" -ne 0 ]; then 176 diff ${diff_options} $CUR /dev/null 177 else 178 echo "[changes omitted]" 179 fi 180 backup_file remove $_file $CUR $BACK 181 fi 182 fi 183} 184 185 186# These are used several times. 187# 188awk -F: '!/^\+/ { print $1 " " $3 }' $MP | sort -k2n > $MPBYUID 189awk -F: '{ print $1 " " $9 }' $MP | sort -k2 > $MPBYPATH 190for file in $special_files; do 191 [ -s $file ] && cat $file 192done | mtree -CM -k all > $SPECIALSPEC || exit 1 193 194 195# Check for enough entropy. 196# 197if checkyesno check_entropy; then 198 if [ "$(sysctl -n kern.entropy.needed)" != 0 ]; then 199 printf '\n' 200 printf 'Entropy:\n' 201 printf 'System may need more entropy for cryptography.\n' 202 printf 'See the entropy(7) man page for details.\n' 203 fi 204fi 205 206 207# Check the master password file syntax. 208# 209if checkyesno check_passwd; then 210 # XXX: the sense of permit_star is reversed; the code works as 211 # implemented, but usage needs to be negated. 212 checkyesno check_passwd_permit_star && permit_star=0 || permit_star=1 213 checkyesno check_passwd_permit_nonalpha \ 214 && permit_nonalpha=1 || permit_nonalpha=0 215 216 awk -v "len=$max_loginlen" \ 217 -v "nowarn_shells_list=$check_passwd_nowarn_shells" \ 218 -v "nowarn_users_list=$check_passwd_nowarn_users" \ 219 -v "permit_star=$permit_star" \ 220 -v "permit_nonalpha=$permit_nonalpha" \ 221 ' 222 BEGIN { 223 while ( getline < "/etc/shells" > 0 ) { 224 if ($0 ~ /^\#/ || $0 ~ /^$/ ) 225 continue; 226 shells[$1]++; 227 } 228 split(nowarn_shells_list, a); 229 for (i in a) nowarn_shells[a[i]]++; 230 split(nowarn_users_list, a); 231 for (i in a) nowarn_users[a[i]]++; 232 uid0_users_list="root toor" 233 split(uid0_users_list, a); 234 for (i in a) uid0_users[a[i]]++; 235 FS=":"; 236 } 237 238 { 239 if ($0 ~ /^[ ]*$/) { 240 printf "Line %d is a blank line.\n", NR; 241 next; 242 } 243 244 # NIS compat entry? 245 compatline = $1 ~ "^[\\+-]"; 246 if (compatline) { 247 if ($1 == "+" && NF == 1) { 248 next; 249 } 250 sub("^.", "", $1); 251 } 252 if (NF != 10) 253 printf "Line %d has the wrong number of fields.\n", NR; 254 if (compatline) { 255 if ($3 == 0) 256 printf "Line %d includes entries with uid 0.\n", 257 NR; 258 if ($1 == "") 259 next; 260 } 261 if (!permit_nonalpha && 262 $1 !~ /^[_A-Za-z0-9]([-A-Za-z0-9_.]*[A-Za-z0-9])*$/) 263 printf "Login %s has non-alphanumeric characters.\n", 264 $1; 265 if (length($1) > len) 266 printf "Login %s has more than "len" characters.\n", 267 $1; 268 if ($2 == "" && !compatline && !nowarn_users[$1]) 269 printf "Login %s has no password.\n", $1; 270 if (!nowarn_shells[$10] && !nowarn_users[$1]) { 271 if (length($2) != 13 && 272 length($2) != 20 && 273 $2 !~ /^\$1/ && 274 $2 !~ /^\$2/ && 275 $2 !~ /^\$sha1/ && 276 $2 !~ /^\$argon2(i|d|id)/ && 277 $2 != "" && 278 (permit_star || $2 != "*") && 279 $2 !~ /^\*[A-z-]+$/ && 280 $1 != "toor") { 281 if ($10 == "" || shells[$10]) 282 printf "Login %s is off but still has "\ 283 "a valid shell (%s)\n", $1, $10; 284 } else if (compatline && $10 == "") { 285 # nothing 286 } else if (! shells[$10]) 287 printf "Login %s does not have a valid "\ 288 "shell (%s)\n", $1, $10; 289 } 290 if ($3 == 0 && !uid0_users[$1] && !nowarn_users[$1]) 291 printf "Login %s has a user id of 0.\n", $1; 292 if ($3 != "" && $3 < 0) 293 printf "Login %s has a negative user id.\n", $1; 294 if ($4 != "" && $4 < 0) 295 printf "Login %s has a negative group id.\n", $1; 296 }' < $MP > $OUTPUT 297 if [ -s $OUTPUT ] ; then 298 printf "\nChecking the $MP file:\n" 299 cat $OUTPUT 300 fi 301 302 awk -F: '{ print $1 }' $MP | sort | uniq -d > $OUTPUT 303 if [ -s $OUTPUT ] ; then 304 printf "\n$MP has duplicate user names.\n" 305 column $OUTPUT 306 fi 307 308 awk -v "permit_dups_list=$check_passwd_permit_dups" \ 309 ' 310 BEGIN { 311 split(permit_dups_list, a); 312 for (i in a) permit_dups[a[i]]++; 313 } 314 { 315 if (!permit_dups[$1]) 316 print $2; 317 }' < $MPBYUID | uniq -d > $TMP2 318 if [ -s $TMP2 ] ; then 319 printf "\n$MP has duplicate user ids.\n" 320 while read uid; do 321 grep -w $uid $MPBYUID 322 done < $TMP2 | column 323 fi 324fi 325 326# Check the group file syntax. 327# 328if checkyesno check_group; then 329 GRP=/etc/group 330 awk -F: -v "len=$max_grouplen" '{ 331 if ($0 ~ /^[ ]*$/) { 332 printf "Line %d is a blank line.\n", NR; 333 next; 334 } 335 if (NF != 4 && ($1 != "+" || NF != 1)) 336 printf "Line %d has the wrong number of fields.\n", NR; 337 if ($1 == "+" ) { 338 next; 339 } 340 if ($1 !~ /^[_A-Za-z0-9]([-A-Za-z0-9_.]*[A-Za-z0-9])*$/) 341 printf "Group %s has non-alphanumeric characters.\n", 342 $1; 343 if (length($1) > len) 344 printf "Group %s has more than "len" characters.\n", $1; 345 if ($3 !~ /[0-9]*/) 346 printf "Login %s has a negative group id.\n", $1; 347 }' < $GRP > $OUTPUT 348 if [ -s $OUTPUT ] ; then 349 printf "\nChecking the $GRP file:\n" 350 cat $OUTPUT 351 fi 352 353 awk -F: '{ print $1 }' $GRP | sort | uniq -d > $OUTPUT 354 dupgroups="" 355 for group in $(cat $OUTPUT) ; do 356 gcount=$(awk -F: "/$group/ { print \$1,\$3 }" $GRP | 357 sort -u | wc -l) 358 if [ $gcount -gt 1 ]; then 359 dupgroups="$dupgroups $group" 360 fi 361 done 362 if [ ! -z $dupgroups ] ; then 363 printf "\n$GRP has duplicate group names.\n" 364 printf "$dupgroups\n" 365 fi 366fi 367 368# Check for root paths, umask values in startup files. 369# The check for the root paths is problematical -- it's likely to fail 370# in other environments. Once the shells have been modified to warn 371# of '.' in the path, the path tests should go away. 372# 373if checkyesno check_rootdotfiles; then 374 rhome=~root 375 umaskset=no 376 list="/etc/csh.cshrc /etc/csh.login ${rhome}/.cshrc ${rhome}/.login" 377 for i in $list ; do 378 if [ -f $i ] ; then 379 if egrep '^[ \t]*umask[ \t]+[0-7]+' $i > /dev/null ; 380 then 381 umaskset=yes 382 fi 383 # Double check the umask value itself; ensure that 384 # both the group and other write bits are set. 385 # 386 egrep '^[ \t]*umask[ \t]+[0-7]+' $i | 387 awk '{ 388 if ($2 ~ /^.$/ || $2 ~! /[^2367].$/) { 389 print "\tRoot umask is group writable" 390 } 391 if ($2 ~ /[^2367]$/) { 392 print "\tRoot umask is other writable" 393 } 394 }' | sort -u 395 SAVE_PATH=$PATH 396 unset PATH 397 /bin/csh -f -s << end-of-csh > /dev/null 2>&1 398 source $i 399 /bin/ls -ldgT \$path > $TMP1 400end-of-csh 401 export PATH=$SAVE_PATH 402 awk '{ 403 if ($10 ~ /^\.$/) { 404 print "\tThe root path includes ."; 405 next; 406 } 407 } 408 $1 ~ /^d....w/ \ 409 { print "\tRoot path directory " $10 " is group writable." } \ 410 $1 ~ /^d.......w/ \ 411 { print "\tRoot path directory " $10 " is other writable." }' \ 412 < $TMP1 413 fi 414 done > $OUTPUT 415 if [ $umaskset = no ] || [ -s $OUTPUT ] ; then 416 printf "\nChecking root csh paths, umask values:\n$list\n\n" 417 if [ -s $OUTPUT ]; then 418 cat $OUTPUT 419 fi 420 if [ $umaskset = no ] ; then 421 printf "\tRoot csh startup files do not set the umask.\n" 422 fi 423 fi 424 425 umaskset=no 426 list="/etc/profile ${rhome}/.profile" 427 for i in $list; do 428 if [ -f $i ] ; then 429 if egrep umask $i > /dev/null ; then 430 umaskset=yes 431 fi 432 egrep umask $i | 433 awk '$2 ~ /^.$/ || $2 ~ /[^2367].$/ \ 434 { print "\tRoot umask is group writable" } \ 435 $2 ~ /[^2367]$/ \ 436 { print "\tRoot umask is other writable" }' 437 SAVE_PATH=$PATH 438 unset PATH 439 /bin/sh << end-of-sh > /dev/null 2>&1 440 . $i 441 list=\$(echo \$PATH | /usr/bin/sed -e \ 442 's/^:/.:/;s/:$/:./;s/::/:.:/g;s/:/ /g') 443 /bin/ls -ldgT \$list > $TMP1 444end-of-sh 445 export PATH=$SAVE_PATH 446 awk '{ 447 if ($10 ~ /^\.$/) { 448 print "\tThe root path includes ."; 449 next; 450 } 451 } 452 $1 ~ /^d....w/ \ 453 { print "\tRoot path directory " $10 " is group writable." } \ 454 $1 ~ /^d.......w/ \ 455 { print "\tRoot path directory " $10 " is other writable." }' \ 456 < $TMP1 457 458 fi 459 done > $OUTPUT 460 if [ $umaskset = no ] || [ -s $OUTPUT ] ; then 461 printf "\nChecking root sh paths, umask values:\n$list\n" 462 if [ -s $OUTPUT ]; then 463 cat $OUTPUT 464 fi 465 if [ $umaskset = no ] ; then 466 printf "\tRoot sh startup files do not set the umask.\n" 467 fi 468 fi 469fi 470 471# Root and uucp should both be in /etc/ftpusers. 472# 473if checkyesno check_ftpusers; then 474 list="uucp "$(awk '$2 == 0 { print $1 }' $MPBYUID) 475 for i in $list; do 476 if /usr/libexec/ftpd -C $i ; then 477 printf "\t$i is not denied\n" 478 fi 479 done > $OUTPUT 480 if [ -s $OUTPUT ]; then 481 printf "\nChecking the /etc/ftpusers configuration:\n" 482 cat $OUTPUT 483 fi 484fi 485 486# Uudecode should not be in the /etc/mail/aliases file. 487# 488if checkyesno check_aliases; then 489 for f in /etc/mail/aliases /etc/aliases; do 490 if [ -f $f ] && egrep '^[^#]*(uudecode|decode).*\|' $f; then 491 printf "\nEntry for uudecode in $f file.\n" 492 fi 493 done 494fi 495 496# Files that should not have + signs. 497# 498if checkyesno check_rhosts; then 499 list="/etc/hosts.equiv /etc/hosts.lpd" 500 for f in $list ; do 501 if [ -f $f ] && egrep '\+' $f > /dev/null ; then 502 printf "\nPlus sign in $f file.\n" 503 fi 504 done 505 506 # Check for special users with .rhosts files. Only root and toor should 507 # have .rhosts files. Also, .rhosts files should not have plus signs. 508 awk -F: '$1 != "root" && $1 != "toor" && \ 509 ($3 < 100 || $1 == "ftp" || $1 == "uucp") \ 510 { print $1 " " $9 }' $MP | 511 sort -k2 | 512 while read uid homedir; do 513 if [ -f ${homedir}/.rhosts ] ; then 514 rhost=$(ls -ldgT ${homedir}/.rhosts) 515 printf -- "$uid: $rhost\n" 516 fi 517 done > $OUTPUT 518 if [ -s $OUTPUT ] ; then 519 printf "\nChecking for special users with .rhosts files.\n" 520 cat $OUTPUT 521 fi 522 523 while read uid homedir; do 524 if [ -f ${homedir}/.rhosts ] && 525 [ -r ${homedir}/.rhosts ] && 526 cat -f ${homedir}/.rhosts | egrep '\+' > /dev/null 527 then 528 printf -- "$uid: + in .rhosts file.\n" 529 fi 530 done < $MPBYPATH > $OUTPUT 531 if [ -s $OUTPUT ] ; then 532 printf "\nChecking .rhosts files syntax.\n" 533 cat $OUTPUT 534 fi 535fi 536 537# Check home directories. Directories should not be owned by someone else 538# or writable. 539# 540if checkyesno check_homes; then 541 checkyesno check_homes_permit_usergroups && \ 542 permit_usergroups=1 || permit_usergroups=0 543 while read uid homedir; do 544 if [ -d ${homedir}/ ] ; then 545 file=$(ls -ldgT ${homedir}) 546 printf -- "$uid $file\n" 547 fi 548 done < $MPBYPATH | 549 awk -v "usergroups=$permit_usergroups" \ 550 -v "permit_owners_list=$check_homes_permit_other_owner" ' 551 BEGIN { 552 split(permit_owners_list, a); 553 for (i in a) permit_owners[a[i]]++; 554 } 555 $1 != $4 && $4 != "root" && !permit_owners[$1] \ 556 { print "user " $1 " home directory is owned by " $4 } 557 $2 ~ /^d....w/ && (!usergroups || $5 != $1) \ 558 { print "user " $1 " home directory is group writable" } 559 $2 ~ /^d.......w/ \ 560 { print "user " $1 " home directory is other writable" }' \ 561 > $OUTPUT 562 if [ -s $OUTPUT ] ; then 563 printf "\nChecking home directories.\n" 564 cat $OUTPUT 565 fi 566 567 # Files that should not be owned by someone else or readable. 568 list=".Xauthority .netrc .ssh/id_dsa .ssh/id_rsa .ssh/identity" 569 while read uid homedir; do 570 for f in $list ; do 571 file=${homedir}/${f} 572 if [ -f $file ] ; then 573 printf -- "$uid $f $(ls -ldgT $file)\n" 574 fi 575 done 576 done < $MPBYPATH | 577 awk -v "usergroups=$permit_usergroups" \ 578 -v "permit_owners_list=$check_homes_permit_other_owner" ' 579 BEGIN { 580 split(permit_owners_list, a); 581 for (i in a) permit_owners[a[i]]++; 582 } 583 $1 != $5 && $5 != "root" && !permit_owners[$1] \ 584 { print "user " $1 " " $2 " file is owned by " $5 } 585 $3 ~ /^-...r/ && (!usergroups || $6 != $1) \ 586 { print "user " $1 " " $2 " file is group readable" } 587 $3 ~ /^-......r/ \ 588 { print "user " $1 " " $2 " file is other readable" } 589 $3 ~ /^-....w/ && (!usergroups || $6 != $1) \ 590 { print "user " $1 " " $2 " file is group writable" } 591 $3 ~ /^-.......w/ \ 592 { print "user " $1 " " $2 " file is other writable" }' \ 593 > $OUTPUT 594 595 # Files that should not be owned by someone else or writable. 596 list=".bash_history .bash_login .bash_logout .bash_profile .bashrc \ 597 .cshrc .emacs .exrc .forward .history .k5login .klogin .login \ 598 .logout .profile .qmail .rc_history .rhosts .shosts ssh .tcshrc \ 599 .twmrc .xinitrc .xsession .ssh/authorized_keys \ 600 .ssh/authorized_keys2 .ssh/config .ssh/id_dsa.pub \ 601 .ssh/id_rsa.pub .ssh/identity.pub .ssh/known_hosts \ 602 .ssh/known_hosts2" 603 while read uid homedir; do 604 for f in $list ; do 605 file=${homedir}/${f} 606 if [ -f $file ] ; then 607 printf -- "$uid $f $(ls -ldgT $file)\n" 608 fi 609 done 610 done < $MPBYPATH | 611 awk -v "usergroups=$permit_usergroups" \ 612 -v "permit_owners_list=$check_homes_permit_other_owner" ' 613 BEGIN { 614 split(permit_owners_list, a); 615 for (i in a) permit_owners[a[i]]++; 616 } 617 $1 != $5 && $5 != "root" && !permit_owners[$1] \ 618 { print "user " $1 " " $2 " file is owned by " $5 } 619 $3 ~ /^-....w/ && (!usergroups || $6 != $1) \ 620 { print "user " $1 " " $2 " file is group writable" } 621 $3 ~ /^-.......w/ \ 622 { print "user " $1 " " $2 " file is other writable" }' \ 623 >> $OUTPUT 624 if [ -s $OUTPUT ] ; then 625 printf "\nChecking dot files.\n" 626 cat $OUTPUT 627 fi 628fi 629 630# Mailboxes should be owned by user and unreadable. 631# 632if checkyesno check_varmail; then 633 ls -lA /var/mail | \ 634 awk ' NR == 1 { next; } 635 $9 ~ /^\./ {next; } 636 $3 != $9 { 637 print "user " $9 " mailbox is owned by " $3 638 } 639 $1 != "-rw-------" { 640 print "user " $9 " mailbox is " $1 ", group " $4 641 }' > $OUTPUT 642 if [ -s $OUTPUT ] ; then 643 printf "\nChecking mailbox ownership.\n" 644 cat $OUTPUT 645 fi 646fi 647 648# NFS exports shouldn't be globally exported 649# 650if checkyesno check_nfs && [ -f /etc/exports ]; then 651 awk '{ 652 # ignore comments and blank lines 653 if ($0 ~ /^\#/ || $0 ~ /^$/ ) 654 next; 655 # manage line continuation 656 while ($NF ~ /^\\$/) { 657 $NF = ""; 658 line = $0 ""; 659 getline; 660 $0 = line $0 ""; 661 } 662 663 delete dir; 664 readonly = ndir = 0; 665 for (i = 1; i <= NF; ++i) { 666 if ($i ~ /^\//) dir[ndir++] = $i; 667 else if ($i ~ /^-/) { 668 if ($i ~ /^-(ro|o)$/) readonly = 1; 669 if ($i ~ /^-network/) next; 670 } 671 else next; 672 } 673 if (readonly) 674 for (item in dir) 675 rodir[nrodir++] = dir[item]; 676 else 677 for (item in dir) 678 rwdir[nrwdir++] = dir[item]; 679 680 } 681 682 END { 683 if (nrodir) { 684 printf("Globally exported file system%s, read-only:\n", 685 nrodir > 1 ? "s" : ""); 686 for (item in rodir) 687 printf("\t%s\n", rodir[item]); 688 } 689 if (nrwdir) { 690 printf("Globally exported file system%s, read-write:\n", 691 nrwdir > 1 ? "s" : ""); 692 for (item in rwdir) 693 printf("\t%s\n", rwdir[item]); 694 } 695 }' < /etc/exports > $OUTPUT 696 if [ -s $OUTPUT ] ; then 697 printf "\nChecking for globally exported file systems.\n" 698 cat $OUTPUT 699 fi 700fi 701 702# Display any changes in setuid files and devices. 703# 704if checkyesno check_devices; then 705 > $ERR 706 ( 707 708 # Convert check_devices_ignore_fstypes="foo !bar bax" 709 # into "-fstype foo -o ! -fstype bar -o -fstype bax" 710 # and check_devices_ignore_paths="/foo !/bar /bax" 711 # into " -path /foo -o ! -path /bar -o -path /bax" 712 # 713 ignexpr=$(\ 714 echo $check_devices_ignore_fstypes | \ 715 sed -e's/\(!*\)\([^[:space:]]\{1,\}\)/-o \1 -fstype \2/g' ; \ 716 echo $check_devices_ignore_paths | \ 717 sed -e's/\(!*\)\([^[:space:]]\{1,\}\)/-o \1 -path \2/g' \ 718 ) 719 720 # Massage the expression into ( $ignexpr ) -a -prune -o 721 if [ -n "${ignexpr}" ]; then 722 ignexpr=$(\ 723 echo $ignexpr | \ 724 sed -e 's/^-o /( /' \ 725 -e 's/$/ ) -a -prune -o/' \ 726 ) 727 fi 728 729 find / $ignexpr \ 730 \( \( -perm -u+s -a ! -type d \) -o \ 731 \( -perm -g+s -a ! -type d \) -o \ 732 -type b -o -type c \) -print0 | \ 733 xargs -0 ls -ldgTq | sort +9 > $LIST 734 735 ) 2> $OUTPUT 736 737 # Display any errors that occurred during system file walk. 738 if [ -s $OUTPUT ] ; then 739 printf "Setuid/device find errors:\n" >> $ERR 740 cat $OUTPUT >> $ERR 741 printf "\n" >> $ERR 742 fi 743 744 # Display any changes in the setuid file list. 745 egrep -v '^[bc]' $LIST > $TMP1 746 if [ -s $TMP1 ] ; then 747 # Check to make sure uudecode isn't setuid. 748 if grep -w uudecode $TMP1 > /dev/null ; then 749 printf "\nUudecode is setuid.\n" >> $ERR 750 fi 751 752 file=$work_dir/setuid 753 migrate_file "$backup_dir/setuid" "$file" 754 CUR=${file}.current 755 BACK=${file}.backup 756 if [ -s $CUR ] ; then 757 if cmp -s $CUR $TMP1 ; then 758 : 759 else 760 > $TMP2 761 join -110 -210 -v2 $CUR $TMP1 > $OUTPUT 762 if [ -s $OUTPUT ] ; then 763 printf "Setuid additions:\n" >> $ERR 764 tee -a $TMP2 < $OUTPUT >> $ERR 765 printf "\n" >> $ERR 766 fi 767 768 join -110 -210 -v1 $CUR $TMP1 > $OUTPUT 769 if [ -s $OUTPUT ] ; then 770 printf "Setuid deletions:\n" >> $ERR 771 tee -a $TMP2 < $OUTPUT >> $ERR 772 printf "\n" >> $ERR 773 fi 774 775 sort -k10 $TMP2 $CUR $TMP1 | \ 776 sed -e 's/[ ][ ]*/ /g' | \ 777 uniq -u > $OUTPUT 778 if [ -s $OUTPUT ] ; then 779 printf "Setuid changes:\n" >> $ERR 780 column -t $OUTPUT >> $ERR 781 printf "\n" >> $ERR 782 fi 783 784 backup_file update $TMP1 $CUR $BACK 785 fi 786 else 787 printf "Setuid additions:\n" >> $ERR 788 column -t $TMP1 >> $ERR 789 printf "\n" >> $ERR 790 backup_file add $TMP1 $CUR $BACK 791 fi 792 fi 793 794 # Check for block and character disk devices that are readable or 795 # writable or not owned by root.operator. 796 >$TMP1 797 DISKLIST="ccd ch hk hp ld md ra raid rb rd rl rx \ 798 sd se ss uk up vnd wd xd xy" 799# DISKLIST="$DISKLIST ct mt st wt" 800 for i in $DISKLIST; do 801 egrep "^b.*/${i}[0-9][0-9]*[a-p]$" $LIST >> $TMP1 802 egrep "^c.*/r${i}[0-9][0-9]*[a-p]$" $LIST >> $TMP1 803 done 804 805 awk '$3 != "root" || $4 != "operator" || $1 !~ /.rw-r-----/ \ 806 { printf "Disk %s is user %s, group %s, permissions %s.\n", \ 807 $11, $3, $4, $1; }' < $TMP1 > $OUTPUT 808 if [ -s $OUTPUT ] ; then 809 printf "\nChecking disk ownership and permissions.\n" >> $ERR 810 cat $OUTPUT >> $ERR 811 printf "\n" >> $ERR 812 fi 813 814 # Display any changes in the device file list. 815 egrep '^[bc]' $LIST | sort -k11 > $TMP1 816 if [ -s $TMP1 ] ; then 817 file=$work_dir/device 818 migrate_file "$backup_dir/device" "$file" 819 CUR=${file}.current 820 BACK=${file}.backup 821 822 if [ -s $CUR ] ; then 823 if cmp -s $CUR $TMP1 ; then 824 : 825 else 826 > $TMP2 827 join -111 -211 -v2 $CUR $TMP1 > $OUTPUT 828 if [ -s $OUTPUT ] ; then 829 printf "Device additions:\n" >> $ERR 830 tee -a $TMP2 < $OUTPUT >> $ERR 831 printf "\n" >> $ERR 832 fi 833 834 join -111 -211 -v1 $CUR $TMP1 > $OUTPUT 835 if [ -s $OUTPUT ] ; then 836 printf "Device deletions:\n" >> $ERR 837 tee -a $TMP2 < $OUTPUT >> $ERR 838 printf "\n" >> $ERR 839 fi 840 841 # Report any block device change. Ignore 842 # character devices, only the name is 843 # significant. 844 cat $TMP2 $CUR $TMP1 | \ 845 sed -e '/^c/d' | \ 846 sort -k11 | \ 847 sed -e 's/[ ][ ]*/ /g' | \ 848 uniq -u > $OUTPUT 849 if [ -s $OUTPUT ] ; then 850 printf "Block device changes:\n" >> $ERR 851 column -t $OUTPUT >> $ERR 852 printf "\n" >> $ERR 853 fi 854 855 backup_file update $TMP1 $CUR $BACK 856 fi 857 else 858 printf "Device additions:\n" >> $ERR 859 column -t $TMP1 >> $ERR 860 printf "\n" >> $ERR 861 backup_file add $TMP1 $CUR $BACK >> $ERR 862 fi 863 fi 864 if [ -s $ERR ] ; then 865 printf "\nChecking setuid files and devices:\n" 866 cat $ERR 867 printf "\n" 868 fi 869fi 870 871# Check special files. 872# Check system binaries. 873# 874# Create the mtree tree specifications using: 875# mtree -cx -pDIR -kmd5,uid,gid,mode,nlink,size,link,time > DIR.secure 876# chown root:wheel DIR.secure 877# chmod u+r,go= DIR.secure 878# 879# Note, this is not complete protection against Trojan horsed binaries, as 880# the hacker can modify the tree specification to match the replaced binary. 881# For details on really protecting yourself against modified binaries, see 882# the mtree(8) manual page. 883# 884if checkyesno check_mtree; then 885 if checkyesno check_mtree_follow_symlinks; then 886 check_mtree_flags="-L" 887 else 888 check_mtree_flags="" 889 fi 890 mtree -e -l -p / $check_mtree_flags -f $SPECIALSPEC 3>&1 >$OUTPUT 2>&3 | 891 grep -v '^mtree: dev/tty: Device not configured$' >&2 892 if [ -s $OUTPUT ]; then 893 printf "\nChecking special files and directories.\n" 894 cat $OUTPUT 895 fi 896 897 for file in /etc/mtree/*.secure; do 898 [ $file = '/etc/mtree/*.secure' ] && continue 899 tree=$(sed -n -e '3s/.* //p' -e 3q $file) 900 mtree $check_mtree_flags -f $file -p $tree > $TMP1 901 if [ -s $TMP1 ]; then 902 printf "\nChecking $tree:\n" 903 cat $TMP1 904 fi 905 done > $OUTPUT 906 if [ -s $OUTPUT ]; then 907 printf "\nChecking system binaries:\n" 908 cat $OUTPUT 909 fi 910fi 911 912# Backup disklabels of available disks 913# 914if checkyesno check_disklabels; then 915 # migrate old disklabels 916 for file in $(ls -1d $backup_dir/$backup_dir/disklabel.* \ 917 $backup_dir/disklabel.* 2>/dev/null); do 918 migrate_file "$file" "$work_dir/${file##*/}" 919 done 920 921 # generate list of old disklabels, fdisks & wedges, 922 # and remove them 923 ls -1d $work_dir/disklabel.* $work_dir/fdisk.* $work_dir/wedges.* \ 924 2>/dev/null | 925 egrep -v '\.(backup|current)(,v)?$' > $LABELS 926 xargs rm < $LABELS 927 928 disks="$(/sbin/sysctl -n hw.iostatnames)" 929 930 # generate disklabels of all disks excluding: cd fd md dk st 931 # nfs and "device" (the header of iostat) 932 for i in $disks; do 933 case $i in 934 [cfm]d[0-9]*|dk[0-9]*|st[0-9]*|nfs[0-9]*) 935 ;; 936 *) 937 if disklabel $i > /dev/null 2>&1; then 938 disklabel $i > "$work_dir/disklabel.$i" 939 fi 940 ;; 941 esac 942 done 943 944 # if fdisk is available, generate fdisks for: ed ld sd wd 945 if [ -x /sbin/fdisk ]; then 946 for i in $disks; do 947 case $i in 948 [elsw]d[0-9]*) 949 /sbin/fdisk $i > "$work_dir/fdisk.$i" \ 950 2>/dev/null 951 ;; 952 esac 953 done 954 fi 955 956 # if dkctl is available, generate dkctl listwedges 957 # for: ed ld sd wd cgd ofdisk ra rl raid 958 if [ -x /sbin/dkctl ]; then 959 for i in $disks; do 960 case $i in 961 [elsw]d[0-9]*|cgd[0-9]*|ofdisk[0-9]*|r[al][0-9]*|raid[0-9]*) 962 if /sbin/dkctl $i listwedges | 963 grep -qe '[0-9] wedges:'; then 964 /sbin/dkctl $i listwedges \ 965 > "$work_dir/wedges.$i" 2>/dev/null 966 fi 967 ;; 968 esac 969 done 970 fi 971 972 # if raidctl is available, generate raidctls for: raid 973 if [ -x /sbin/raidctl ]; then 974 disks=$(iostat -x | awk 'NR > 1 && $1 ~ /^raid/ { print $1; }') 975 for i in $disks; do 976 /sbin/raidctl -G $i > "$work_dir/raidconf.$i" \ 977 2>/dev/null 978 done 979 fi 980 981 # append list of new disklabels, fdisks and wedges 982 ls -1d $work_dir/disklabel.* $work_dir/fdisk.* $work_dir/wedges.* \ 983 $work_dir/raidconf.* 2>/dev/null | 984 egrep -v '\.(backup|current)(,v)?$' >> $LABELS 985 CHANGELIST="$LABELS $CHANGELIST" 986fi 987 988if checkyesno check_lvm; then 989 # generate list of existing LVM elements Physical Volumes, 990 # Volume Groups and Logical Volumes. 991 if [ -x /sbin/lvm ]; then 992 lvm pvdisplay -m >"$work_dir/lvm.pv" 2>/dev/null 993 lvm vgdisplay -m >"$work_dir/lvm.vg" 2>/dev/null 994 lvm lvdisplay -m >"$work_dir/lvm.lv" 2>/dev/null 995 fi 996 ls -1d $work_dir/lvm.* 2>/dev/null | 997 egrep -v '\.(backup|current)(,v)?$'>> $LVM_LABELS 998 CHANGELIST="$CHANGELIST $LVM_LABELS" 999fi 1000 1001# Check for changes in the list of installed pkgs 1002# 1003if checkyesno check_pkgs && have_pkgs; then 1004 pkgs=$work_dir/pkgs 1005 migrate_file "$backup_dir/pkgs" "$pkgs" 1006 pkg_dbdir=$(${pkg_admin} config-var PKG_DBDIR) 1007 : ${pkg_dbdir:=/usr/pkg/pkgdb} 1008 ( cd $pkg_dbdir 1009 $pkg_info | sort 1010 echo "" 1011 find . \( -name +REQUIRED_BY -o -name +CONTENTS \) -print0 | 1012 xargs -0 ls -ldgTq | sort -t. +1 | sed -e 's, \./, ,' 1013 ) > $pkgs 1014 echo "$pkgs" > $PKGS 1015 CHANGELIST="$PKGS $CHANGELIST" 1016fi 1017 1018# List of files that get backed up and checked for any modifications. 1019# Any changes cause the files to rotate. 1020# 1021if checkyesno check_changelist ; then 1022 mtree -D -k type -f $SPECIALSPEC -E exclude | 1023 sed '/^type=file/!d ; s/type=file \.//' | unvis > $CHANGEFILES 1024 1025 ( 1026 # Add other files which might dynamically exist: 1027 # /etc/ifconfig.* 1028 # /etc/raid*.conf 1029 # /etc/rc.d/* 1030 # /etc/rc.conf.d/* 1031 # 1032 echo "/etc/ifconfig.*" 1033 echo "/etc/raid*.conf" 1034 echo "/etc/rc.d/*" 1035 echo "/etc/rc.conf.d/*" 1036 echo "/etc/lvm/backup/*" 1037 echo "/etc/lvm/archive/*" 1038 1039 # Add /etc/changelist 1040 # 1041 if [ -s /etc/changelist ]; then 1042 grep -v '^#' /etc/changelist 1043 fi 1044 ) | while read file; do 1045 case "$file" in 1046 *[\*\?\[]*) # If changelist line is a glob ... 1047 # ... expand possible backup files 1048 # 1049 ls -1d $backup_dir/${file}.current 2>/dev/null \ 1050 | sed "s,^$backup_dir/,, ; s,\.current$,," 1051 1052 # ... expand possible files 1053 # 1054 ls -1d $file 2>/dev/null 1055 ;; 1056 *) 1057 # Otherwise, just print the filename 1058 echo $file 1059 ;; 1060 esac 1061 done >> $CHANGEFILES 1062 CHANGELIST="$CHANGEFILES $CHANGELIST" 1063fi 1064 1065# Save entropy to ${random_file} if defined, like 1066# /etc/rc.d/random_seed. 1067# 1068if [ -n "${random_file:-}" ]; then 1069 rndctl -S "$random_file" 1070fi 1071 1072# Special case backups, including the master password file and 1073# ssh private host keys. The normal backup mechanisms for 1074# $check_changelist (see below) also print out the actual file 1075# differences and we don't want to do that for these files 1076# 1077echo $MP > $TMP1 # always add /etc/master.passwd 1078mtree -D -k type -f $SPECIALSPEC -I nodiff | 1079 sed '/^type=file/!d ; s/type=file \.//' | unvis >> $TMP1 1080grep -v '^$' $TMP1 | sort -u > $TMP2 1081 1082while read file; do 1083 backup_and_diff "$file" no 1084done < $TMP2 1085 1086 1087if [ -n "$CHANGELIST" ]; then 1088 grep -h -v '^$' $CHANGELIST | sort -u > $TMP1 1089 comm -23 $TMP1 $TMP2 | while read file; do 1090 backup_and_diff "$file" yes 1091 done 1092fi 1093 1094if have_pkgs; then 1095 if checkyesno check_pkg_vulnerabilities; then 1096 ${pkg_admin} ${_compat_K_flag} audit >${OUTPUT} 2>&1 1097 if [ -s ${OUTPUT} ]; then 1098 printf "\nInstalled vulnerable packages:\n" 1099 cat ${OUTPUT} 1100 fi 1101 fi 1102 1103 if checkyesno check_pkg_signatures; then 1104 ${pkg_admin} ${_compat_K_flag} check >${OUTPUT} 2>&1 1105 if [ $? -ne 0 ]; then 1106 printf "\nFiles with invalid signatures:\n" 1107 cat ${OUTPUT} 1108 fi 1109 fi 1110fi 1111 1112if [ -f /etc/security.local ]; then 1113 . /etc/security.local > $OUTPUT 2>&1 1114 if [ -s $OUTPUT ] ; then 1115 printf "\nRunning /etc/security.local:\n" 1116 cat $OUTPUT 1117 fi 1118fi 1119