security revision 1.113
1 #!/bin/sh - 2 # 3 # $NetBSD: security,v 1.113 2013/09/08 08:19:40 prlw1 Exp $ 4 # from: @(#)security 8.1 (Berkeley) 6/9/93 5 # 6 7 PATH=/sbin:/usr/sbin:/bin:/usr/bin 8 9 rcvar_manpage='security.conf(5)' 10 11 if [ -f /etc/rc.subr ]; then 12 . /etc/rc.subr 13 else 14 echo "Can't read /etc/rc.subr; aborting." 15 exit 1; 16 fi 17 18 umask 077 19 TZ=UTC; export TZ 20 21 if [ -s /etc/security.conf ]; then 22 . /etc/security.conf 23 fi 24 if [ -s /etc/pkgpath.conf ]; then 25 . /etc/pkgpath.conf 26 fi 27 28 # Set reasonable defaults (if they're not set in security.conf) 29 # 30 backup_dir=${backup_dir:-/var/backups} 31 max_loginlen=${max_loginlen:-8} 32 max_grouplen=${max_grouplen:-8} 33 pkg_admin=${pkg_admin:-/usr/sbin/pkg_admin} 34 pkg_info=${pkg_info:-/usr/sbin/pkg_info} 35 36 # Other configurable variables 37 # 38 special_files="/etc/mtree/special /etc/mtree/special.local" 39 MP=/etc/master.passwd 40 CHANGELIST="" 41 work_dir=$backup_dir/work 42 43 if [ ! -d "$work_dir" ]; then 44 mkdir -p "$work_dir" 45 fi 46 47 SECUREDIR=$(mktemp -d -t _securedir) || exit 1 48 49 trap "/bin/rm -rf $SECUREDIR ; exit 0" EXIT INT QUIT PIPE 50 51 if ! cd "$SECUREDIR"; then 52 echo "Can not cd to $SECUREDIR". 53 exit 1 54 fi 55 56 ERR=err.$$ 57 TMP1=tmp1.$$ 58 TMP2=tmp2.$$ 59 MPBYUID=mpbyuid.$$ 60 MPBYPATH=mpbypath.$$ 61 LIST=list.$$ 62 OUTPUT=output.$$ 63 LABELS=labels.$$ 64 LVM_LABELS=lvm.$$ 65 PKGS=pkgs.$$ 66 CHANGEFILES=changefiles.$$ 67 SPECIALSPEC=specialspec.$$ 68 69 if [ -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}" 73 fi 74 75 have_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 # 85 migrate_file() 86 { 87 _old=$1 88 _new=$2 89 if [ -z "$_old" -o -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}" -a ! -f "${_new}" ]; then 96 echo "==> migrating ${_old}" 97 echo " to ${_new}" 98 mv "${_old}" "${_new}" 99 fi 100 if [ -f "${_old}.current" -a ! -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" -a ! -f "${_new}.current,v" ]; then 105 echo "==> migrating ${_old}.current,v" 106 echo " to ${_new}.current,v" 107 mv "${_old}.current,v" "${_new}.current,v" 108 fi 109 if [ -f "${_old}.backup" -a ! -f "${_new}.backup" ]; then 110 echo "==> migrating ${_old}.backup" 111 echo " to ${_new}.backup" 112 mv "${_old}.backup" "${_new}.backup" 113 fi 114 fi 115 } 116 117 118 # backup_and_diff file printdiff 119 # Determine if file needs backing up, and if so, do it. 120 # If printdiff is yes, display the diffs, otherwise 121 # just print a message saying "[changes omitted]". 122 # 123 backup_and_diff() 124 { 125 _file=$1 126 _printdiff=$2 127 if [ -z "$_file" -o -z "$_printdiff" ]; then 128 err 3 "USAGE: backup_and_diff file printdiff" 129 fi 130 ! checkyesno _printdiff 131 _printdiff=$? 132 133 _old=$backup_dir/${_file##*/} 134 case "$_file" in 135 $work_dir/*) 136 _new=$_file 137 migrate_file "$backup_dir/$_old" "$_new" 138 migrate_file "$_old" "$_new" 139 ;; 140 *) 141 _new=$backup_dir/$_file 142 migrate_file "$_old" "$_new" 143 ;; 144 esac 145 CUR=${_new}.current 146 BACK=${_new}.backup 147 if [ -f $_file ]; then 148 if [ -f $CUR ] ; then 149 if [ "$_printdiff" -ne 0 ]; then 150 diff ${diff_options} $CUR $_file > $OUTPUT 151 else 152 if ! cmp -s $CUR $_file; then 153 echo "[changes omitted]" 154 fi > $OUTPUT 155 fi 156 if [ -s $OUTPUT ] ; then 157 printf \ 158 "\n======\n%s diffs (OLD < > NEW)\n======\n" $_file 159 cat $OUTPUT 160 backup_file update $_file $CUR $BACK 161 fi 162 else 163 printf "\n======\n%s added\n======\n" $_file 164 if [ "$_printdiff" -ne 0 ]; then 165 diff ${diff_options} /dev/null $_file 166 else 167 echo "[changes omitted]" 168 fi 169 backup_file add $_file $CUR $BACK 170 fi 171 else 172 if [ -f $CUR ]; then 173 printf "\n======\n%s removed\n======\n" $_file 174 if [ "$_printdiff" -ne 0 ]; then 175 diff ${diff_options} $CUR /dev/null 176 else 177 echo "[changes omitted]" 178 fi 179 backup_file remove $_file $CUR $BACK 180 fi 181 fi 182 } 183 184 185 # These are used several times. 186 # 187 awk -F: '!/^\+/ { print $1 " " $3 }' $MP | sort -k2n > $MPBYUID 188 awk -F: '{ print $1 " " $9 }' $MP | sort -k2 > $MPBYPATH 189 for file in $special_files; do 190 [ -s $file ] && cat $file 191 done | mtree -CM -k all > $SPECIALSPEC || exit 1 192 193 194 # Check the master password file syntax. 195 # 196 if checkyesno check_passwd; then 197 # XXX: the sense of permit_star is reversed; the code works as 198 # implemented, but usage needs to be negated. 199 checkyesno check_passwd_permit_star && permit_star=0 || permit_star=1 200 checkyesno check_passwd_permit_nonalpha \ 201 && permit_nonalpha=1 || permit_nonalpha=0 202 203 awk -v "len=$max_loginlen" \ 204 -v "nowarn_shells_list=$check_passwd_nowarn_shells" \ 205 -v "nowarn_users_list=$check_passwd_nowarn_users" \ 206 -v "permit_star=$permit_star" \ 207 -v "permit_nonalpha=$permit_nonalpha" \ 208 ' 209 BEGIN { 210 while ( getline < "/etc/shells" > 0 ) { 211 if ($0 ~ /^\#/ || $0 ~ /^$/ ) 212 continue; 213 shells[$1]++; 214 } 215 split(nowarn_shells_list, a); 216 for (i in a) nowarn_shells[a[i]]++; 217 split(nowarn_users_list, a); 218 for (i in a) nowarn_users[a[i]]++; 219 uid0_users_list="root toor" 220 split(uid0_users_list, a); 221 for (i in a) uid0_users[a[i]]++; 222 FS=":"; 223 } 224 225 { 226 if ($0 ~ /^[ ]*$/) { 227 printf "Line %d is a blank line.\n", NR; 228 next; 229 } 230 231 # NIS compat entry? 232 compatline = $1 ~ "^[\\+-]"; 233 if (compatline) { 234 if ($1 == "+" && NF == 1) { 235 next; 236 } 237 sub("^.", "", $1); 238 } 239 if (NF != 10) 240 printf "Line %d has the wrong number of fields.\n", NR; 241 if (compatline) { 242 if ($3 == 0) 243 printf "Line %d includes entries with uid 0.\n", 244 NR; 245 if ($1 == "") 246 next; 247 } 248 if (!permit_nonalpha && 249 $1 !~ /^[_A-Za-z0-9]([-A-Za-z0-9_.]*[A-Za-z0-9])*$/) 250 printf "Login %s has non-alphanumeric characters.\n", 251 $1; 252 if (length($1) > len) 253 printf "Login %s has more than "len" characters.\n", 254 $1; 255 if ($2 == "" && !compatline && !nowarn_users[$1]) 256 printf "Login %s has no password.\n", $1; 257 if (!nowarn_shells[$10] && !nowarn_users[$1]) { 258 if (length($2) != 13 && 259 length($2) != 20 && 260 $2 !~ /^\$1/ && 261 $2 !~ /^\$2/ && 262 $2 !~ /^\$sha1/ && 263 $2 != "" && 264 (permit_star || $2 != "*") && 265 $2 !~ /^\*[A-z-]+$/ && 266 $1 != "toor") { 267 if ($10 == "" || shells[$10]) 268 printf "Login %s is off but still has "\ 269 "a valid shell (%s)\n", $1, $10; 270 } else if (compatline && $10 == "") { 271 # nothing 272 } else if (! shells[$10]) 273 printf "Login %s does not have a valid "\ 274 "shell (%s)\n", $1, $10; 275 } 276 if ($3 == 0 && !uid0_users[$1] && !nowarn_users[$1]) 277 printf "Login %s has a user id of 0.\n", $1; 278 if ($3 != "" && $3 < 0) 279 printf "Login %s has a negative user id.\n", $1; 280 if ($4 != "" && $4 < 0) 281 printf "Login %s has a negative group id.\n", $1; 282 }' < $MP > $OUTPUT 283 if [ -s $OUTPUT ] ; then 284 printf "\nChecking the $MP file:\n" 285 cat $OUTPUT 286 fi 287 288 awk -F: '{ print $1 }' $MP | sort | uniq -d > $OUTPUT 289 if [ -s $OUTPUT ] ; then 290 printf "\n$MP has duplicate user names.\n" 291 column $OUTPUT 292 fi 293 294 awk -v "permit_dups_list=$check_passwd_permit_dups" \ 295 ' 296 BEGIN { 297 split(permit_dups_list, a); 298 for (i in a) permit_dups[a[i]]++; 299 } 300 { 301 if (!permit_dups[$1]) 302 print $2; 303 }' < $MPBYUID | uniq -d > $TMP2 304 if [ -s $TMP2 ] ; then 305 printf "\n$MP has duplicate user ids.\n" 306 while read uid; do 307 grep -w $uid $MPBYUID 308 done < $TMP2 | column 309 fi 310 fi 311 312 # Check the group file syntax. 313 # 314 if checkyesno check_group; then 315 GRP=/etc/group 316 awk -F: -v "len=$max_grouplen" '{ 317 if ($0 ~ /^[ ]*$/) { 318 printf "Line %d is a blank line.\n", NR; 319 next; 320 } 321 if (NF != 4 && ($1 != "+" || NF != 1)) 322 printf "Line %d has the wrong number of fields.\n", NR; 323 if ($1 == "+" ) { 324 next; 325 } 326 if ($1 !~ /^[_A-Za-z0-9]([-A-Za-z0-9_.]*[A-Za-z0-9])*$/) 327 printf "Group %s has non-alphanumeric characters.\n", 328 $1; 329 if (length($1) > len) 330 printf "Group %s has more than "len" characters.\n", $1; 331 if ($3 !~ /[0-9]*/) 332 printf "Login %s has a negative group id.\n", $1; 333 }' < $GRP > $OUTPUT 334 if [ -s $OUTPUT ] ; then 335 printf "\nChecking the $GRP file:\n" 336 cat $OUTPUT 337 fi 338 339 awk -F: '{ print $1 }' $GRP | sort | uniq -d > $OUTPUT 340 if [ -s $OUTPUT ] ; then 341 printf "\n$GRP has duplicate group names.\n" 342 column $OUTPUT 343 fi 344 fi 345 346 # Check for root paths, umask values in startup files. 347 # The check for the root paths is problematical -- it's likely to fail 348 # in other environments. Once the shells have been modified to warn 349 # of '.' in the path, the path tests should go away. 350 # 351 if checkyesno check_rootdotfiles; then 352 rhome=~root 353 umaskset=no 354 list="/etc/csh.cshrc /etc/csh.login ${rhome}/.cshrc ${rhome}/.login" 355 for i in $list ; do 356 if [ -f $i ] ; then 357 if egrep '^[ \t]*umask[ \t]+[0-7]+' $i > /dev/null ; 358 then 359 umaskset=yes 360 fi 361 # Double check the umask value itself; ensure that 362 # both the group and other write bits are set. 363 # 364 egrep '^[ \t]*umask[ \t]+[0-7]+' $i | 365 awk '{ 366 if ($2 ~ /^.$/ || $2 ~! /[^2367].$/) { 367 print "\tRoot umask is group writable" 368 } 369 if ($2 ~ /[^2367]$/) { 370 print "\tRoot umask is other writable" 371 } 372 }' | sort -u 373 SAVE_PATH=$PATH 374 unset PATH 375 /bin/csh -f -s << end-of-csh > /dev/null 2>&1 376 source $i 377 /bin/ls -ldgT \$path > $TMP1 378 end-of-csh 379 export PATH=$SAVE_PATH 380 awk '{ 381 if ($10 ~ /^\.$/) { 382 print "\tThe root path includes ."; 383 next; 384 } 385 } 386 $1 ~ /^d....w/ \ 387 { print "\tRoot path directory " $10 " is group writable." } \ 388 $1 ~ /^d.......w/ \ 389 { print "\tRoot path directory " $10 " is other writable." }' \ 390 < $TMP1 391 fi 392 done > $OUTPUT 393 if [ $umaskset = "no" -o -s $OUTPUT ] ; then 394 printf "\nChecking root csh paths, umask values:\n$list\n\n" 395 if [ -s $OUTPUT ]; then 396 cat $OUTPUT 397 fi 398 if [ $umaskset = "no" ] ; then 399 printf "\tRoot csh startup files do not set the umask.\n" 400 fi 401 fi 402 403 umaskset=no 404 list="/etc/profile ${rhome}/.profile" 405 for i in $list; do 406 if [ -f $i ] ; then 407 if egrep umask $i > /dev/null ; then 408 umaskset=yes 409 fi 410 egrep umask $i | 411 awk '$2 ~ /^.$/ || $2 ~ /[^2367].$/ \ 412 { print "\tRoot umask is group writable" } \ 413 $2 ~ /[^2367]$/ \ 414 { print "\tRoot umask is other writable" }' 415 SAVE_PATH=$PATH 416 unset PATH 417 /bin/sh << end-of-sh > /dev/null 2>&1 418 . $i 419 list=\$(echo \$PATH | /usr/bin/sed -e \ 420 's/^:/.:/;s/:$/:./;s/::/:.:/g;s/:/ /g') 421 /bin/ls -ldgT \$list > $TMP1 422 end-of-sh 423 export PATH=$SAVE_PATH 424 awk '{ 425 if ($10 ~ /^\.$/) { 426 print "\tThe root path includes ."; 427 next; 428 } 429 } 430 $1 ~ /^d....w/ \ 431 { print "\tRoot path directory " $10 " is group writable." } \ 432 $1 ~ /^d.......w/ \ 433 { print "\tRoot path directory " $10 " is other writable." }' \ 434 < $TMP1 435 436 fi 437 done > $OUTPUT 438 if [ $umaskset = "no" -o -s $OUTPUT ] ; then 439 printf "\nChecking root sh paths, umask values:\n$list\n" 440 if [ -s $OUTPUT ]; then 441 cat $OUTPUT 442 fi 443 if [ $umaskset = "no" ] ; then 444 printf "\tRoot sh startup files do not set the umask.\n" 445 fi 446 fi 447 fi 448 449 # Root and uucp should both be in /etc/ftpusers. 450 # 451 if checkyesno check_ftpusers; then 452 list="uucp "$(awk '$2 == 0 { print $1 }' $MPBYUID) 453 for i in $list; do 454 if /usr/libexec/ftpd -C $i ; then 455 printf "\t$i is not denied\n" 456 fi 457 done > $OUTPUT 458 if [ -s $OUTPUT ]; then 459 printf "\nChecking the /etc/ftpusers configuration:\n" 460 cat $OUTPUT 461 fi 462 fi 463 464 # Uudecode should not be in the /etc/mail/aliases file. 465 # 466 if checkyesno check_aliases; then 467 for f in /etc/mail/aliases /etc/aliases; do 468 if [ -f $f ] && egrep '^[^#]*(uudecode|decode).*\|' $f; then 469 printf "\nEntry for uudecode in $f file.\n" 470 fi 471 done 472 fi 473 474 # Files that should not have + signs. 475 # 476 if checkyesno check_rhosts; then 477 list="/etc/hosts.equiv /etc/hosts.lpd" 478 for f in $list ; do 479 if [ -f $f ] && egrep '\+' $f > /dev/null ; then 480 printf "\nPlus sign in $f file.\n" 481 fi 482 done 483 484 # Check for special users with .rhosts files. Only root and toor should 485 # have .rhosts files. Also, .rhosts files should not have plus signs. 486 awk -F: '$1 != "root" && $1 != "toor" && \ 487 ($3 < 100 || $1 == "ftp" || $1 == "uucp") \ 488 { print $1 " " $9 }' $MP | 489 sort -k2 | 490 while read uid homedir; do 491 if [ -f ${homedir}/.rhosts ] ; then 492 rhost=$(ls -ldgT ${homedir}/.rhosts) 493 printf -- "$uid: $rhost\n" 494 fi 495 done > $OUTPUT 496 if [ -s $OUTPUT ] ; then 497 printf "\nChecking for special users with .rhosts files.\n" 498 cat $OUTPUT 499 fi 500 501 while read uid homedir; do 502 if [ -f ${homedir}/.rhosts -a -r ${homedir}/.rhosts ] && \ 503 cat -f ${homedir}/.rhosts | egrep '\+' > /dev/null ; then 504 printf -- "$uid: + in .rhosts file.\n" 505 fi 506 done < $MPBYPATH > $OUTPUT 507 if [ -s $OUTPUT ] ; then 508 printf "\nChecking .rhosts files syntax.\n" 509 cat $OUTPUT 510 fi 511 fi 512 513 # Check home directories. Directories should not be owned by someone else 514 # or writable. 515 # 516 if checkyesno check_homes; then 517 checkyesno check_homes_permit_usergroups && \ 518 permit_usergroups=1 || permit_usergroups=0 519 while read uid homedir; do 520 if [ -d ${homedir}/ ] ; then 521 file=$(ls -ldgT ${homedir}) 522 printf -- "$uid $file\n" 523 fi 524 done < $MPBYPATH | 525 awk -v "usergroups=$permit_usergroups" ' 526 $1 != $4 && $4 != "root" \ 527 { print "user " $1 " home directory is owned by " $4 } 528 $2 ~ /^d....w/ && (!usergroups || $5 != $1) \ 529 { print "user " $1 " home directory is group writable" } 530 $2 ~ /^d.......w/ \ 531 { print "user " $1 " home directory is other writable" }' \ 532 > $OUTPUT 533 if [ -s $OUTPUT ] ; then 534 printf "\nChecking home directories.\n" 535 cat $OUTPUT 536 fi 537 538 # Files that should not be owned by someone else or readable. 539 list=".Xauthority .netrc .ssh/id_dsa .ssh/id_rsa .ssh/identity" 540 while read uid homedir; do 541 for f in $list ; do 542 file=${homedir}/${f} 543 if [ -f $file ] ; then 544 printf -- "$uid $f $(ls -ldgT $file)\n" 545 fi 546 done 547 done < $MPBYPATH | 548 awk -v "usergroups=$permit_usergroups" ' 549 $1 != $5 && $5 != "root" \ 550 { print "user " $1 " " $2 " file is owned by " $5 } 551 $3 ~ /^-...r/ && (!usergroups || $6 != $1) \ 552 { print "user " $1 " " $2 " file is group readable" } 553 $3 ~ /^-......r/ \ 554 { print "user " $1 " " $2 " file is other readable" } 555 $3 ~ /^-....w/ && (!usergroups || $6 != $1) \ 556 { print "user " $1 " " $2 " file is group writable" } 557 $3 ~ /^-.......w/ \ 558 { print "user " $1 " " $2 " file is other writable" }' \ 559 > $OUTPUT 560 561 # Files that should not be owned by someone else or writable. 562 list=".bash_history .bash_login .bash_logout .bash_profile .bashrc \ 563 .cshrc .emacs .exrc .forward .history .k5login .klogin .login \ 564 .logout .profile .qmail .rc_history .rhosts .shosts ssh .tcshrc \ 565 .twmrc .xinitrc .xsession .ssh/authorized_keys \ 566 .ssh/authorized_keys2 .ssh/config .ssh/id_dsa.pub \ 567 .ssh/id_rsa.pub .ssh/identity.pub .ssh/known_hosts \ 568 .ssh/known_hosts2" 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 $1 != $5 && $5 != "root" \ 579 { print "user " $1 " " $2 " file is owned by " $5 } 580 $3 ~ /^-....w/ && (!usergroups || $6 != $1) \ 581 { print "user " $1 " " $2 " file is group writable" } 582 $3 ~ /^-.......w/ \ 583 { print "user " $1 " " $2 " file is other writable" }' \ 584 >> $OUTPUT 585 if [ -s $OUTPUT ] ; then 586 printf "\nChecking dot files.\n" 587 cat $OUTPUT 588 fi 589 fi 590 591 # Mailboxes should be owned by user and unreadable. 592 # 593 if checkyesno check_varmail; then 594 ls -lA /var/mail | \ 595 awk ' NR == 1 { next; } 596 $9 ~ /^\./ {next; } 597 $3 != $9 { 598 print "user " $9 " mailbox is owned by " $3 599 } 600 $1 != "-rw-------" { 601 print "user " $9 " mailbox is " $1 ", group " $4 602 }' > $OUTPUT 603 if [ -s $OUTPUT ] ; then 604 printf "\nChecking mailbox ownership.\n" 605 cat $OUTPUT 606 fi 607 fi 608 609 # NFS exports shouldn't be globally exported 610 # 611 if checkyesno check_nfs && [ -f /etc/exports ]; then 612 awk '{ 613 # ignore comments and blank lines 614 if ($0 ~ /^\#/ || $0 ~ /^$/ ) 615 next; 616 # manage line continuation 617 while ($NF ~ /^\\$/) { 618 $NF = ""; 619 line = $0 ""; 620 getline; 621 $0 = line $0 ""; 622 } 623 624 delete dir; 625 readonly = ndir = 0; 626 for (i = 1; i <= NF; ++i) { 627 if ($i ~ /^\//) dir[ndir++] = $i; 628 else if ($i ~ /^-/) { 629 if ($i ~ /^-(ro|o)$/) readonly = 1; 630 if ($i ~ /^-network/) next; 631 } 632 else next; 633 } 634 if (readonly) 635 for (item in dir) 636 rodir[nrodir++] = dir[item]; 637 else 638 for (item in dir) 639 rwdir[nrwdir++] = dir[item]; 640 641 } 642 643 END { 644 if (nrodir) { 645 printf("Globally exported file system%s, read-only:\n", 646 nrodir > 1 ? "s" : ""); 647 for (item in rodir) 648 printf("\t%s\n", rodir[item]); 649 } 650 if (nrwdir) { 651 printf("Globally exported file system%s, read-write:\n", 652 nrwdir > 1 ? "s" : ""); 653 for (item in rwdir) 654 printf("\t%s\n", rwdir[item]); 655 } 656 }' < /etc/exports > $OUTPUT 657 if [ -s $OUTPUT ] ; then 658 printf "\nChecking for globally exported file systems.\n" 659 cat $OUTPUT 660 fi 661 fi 662 663 # Display any changes in setuid files and devices. 664 # 665 if checkyesno check_devices; then 666 > $ERR 667 ( 668 669 # Convert check_devices_ignore_fstypes="foo !bar bax" 670 # into "-fstype foo -o ! -fstype bar -o -fstype bax" 671 # and check_devices_ignore_paths="/foo !/bar /bax" 672 # into " -path /foo -o ! -path /bar -o -path /bax" 673 # 674 ignexpr=$(\ 675 echo $check_devices_ignore_fstypes | \ 676 sed -e's/\(!*\)\([^[:space:]]\{1,\}\)/-o \1 -fstype \2/g' ; \ 677 echo $check_devices_ignore_paths | \ 678 sed -e's/\(!*\)\([^[:space:]]\{1,\}\)/-o \1 -path \2/g' \ 679 ) 680 681 # Massage the expression into ( $ignexpr ) -a -prune -o 682 if [ -n "${ignexpr}" ]; then 683 ignexpr=$(\ 684 echo $ignexpr | \ 685 sed -e 's/^-o /( /' \ 686 -e 's/$/ ) -a -prune -o/' \ 687 ) 688 fi 689 690 find / $ignexpr \ 691 \( \( -perm -u+s -a ! -type d \) -o \ 692 \( -perm -g+s -a ! -type d \) -o \ 693 -type b -o -type c \) -print0 | \ 694 xargs -0 ls -ldgTq | sort +9 > $LIST 695 696 ) 2> $OUTPUT 697 698 # Display any errors that occurred during system file walk. 699 if [ -s $OUTPUT ] ; then 700 printf "Setuid/device find errors:\n" >> $ERR 701 cat $OUTPUT >> $ERR 702 printf "\n" >> $ERR 703 fi 704 705 # Display any changes in the setuid file list. 706 egrep -v '^[bc]' $LIST > $TMP1 707 if [ -s $TMP1 ] ; then 708 # Check to make sure uudecode isn't setuid. 709 if grep -w uudecode $TMP1 > /dev/null ; then 710 printf "\nUudecode is setuid.\n" >> $ERR 711 fi 712 713 file=$work_dir/setuid 714 migrate_file "$backup_dir/setuid" "$file" 715 CUR=${file}.current 716 BACK=${file}.backup 717 if [ -s $CUR ] ; then 718 if cmp -s $CUR $TMP1 ; then 719 : 720 else 721 > $TMP2 722 join -110 -210 -v2 $CUR $TMP1 > $OUTPUT 723 if [ -s $OUTPUT ] ; then 724 printf "Setuid additions:\n" >> $ERR 725 tee -a $TMP2 < $OUTPUT >> $ERR 726 printf "\n" >> $ERR 727 fi 728 729 join -110 -210 -v1 $CUR $TMP1 > $OUTPUT 730 if [ -s $OUTPUT ] ; then 731 printf "Setuid deletions:\n" >> $ERR 732 tee -a $TMP2 < $OUTPUT >> $ERR 733 printf "\n" >> $ERR 734 fi 735 736 sort -k10 $TMP2 $CUR $TMP1 | \ 737 sed -e 's/[ ][ ]*/ /g' | \ 738 uniq -u > $OUTPUT 739 if [ -s $OUTPUT ] ; then 740 printf "Setuid changes:\n" >> $ERR 741 column -t $OUTPUT >> $ERR 742 printf "\n" >> $ERR 743 fi 744 745 backup_file update $TMP1 $CUR $BACK 746 fi 747 else 748 printf "Setuid additions:\n" >> $ERR 749 column -t $TMP1 >> $ERR 750 printf "\n" >> $ERR 751 backup_file add $TMP1 $CUR $BACK 752 fi 753 fi 754 755 # Check for block and character disk devices that are readable or 756 # writable or not owned by root.operator. 757 >$TMP1 758 DISKLIST="ccd ch hk hp ld md ra raid rb rd rl rx \ 759 sd se ss uk up vnd wd xd xy" 760 # DISKLIST="$DISKLIST ct mt st wt" 761 for i in $DISKLIST; do 762 egrep "^b.*/${i}[0-9][0-9]*[a-p]$" $LIST >> $TMP1 763 egrep "^c.*/r${i}[0-9][0-9]*[a-p]$" $LIST >> $TMP1 764 done 765 766 awk '$3 != "root" || $4 != "operator" || $1 !~ /.rw-r-----/ \ 767 { printf "Disk %s is user %s, group %s, permissions %s.\n", \ 768 $11, $3, $4, $1; }' < $TMP1 > $OUTPUT 769 if [ -s $OUTPUT ] ; then 770 printf "\nChecking disk ownership and permissions.\n" >> $ERR 771 cat $OUTPUT >> $ERR 772 printf "\n" >> $ERR 773 fi 774 775 # Display any changes in the device file list. 776 egrep '^[bc]' $LIST | sort -k11 > $TMP1 777 if [ -s $TMP1 ] ; then 778 file=$work_dir/device 779 migrate_file "$backup_dir/device" "$file" 780 CUR=${file}.current 781 BACK=${file}.backup 782 783 if [ -s $CUR ] ; then 784 if cmp -s $CUR $TMP1 ; then 785 : 786 else 787 > $TMP2 788 join -111 -211 -v2 $CUR $TMP1 > $OUTPUT 789 if [ -s $OUTPUT ] ; then 790 printf "Device additions:\n" >> $ERR 791 tee -a $TMP2 < $OUTPUT >> $ERR 792 printf "\n" >> $ERR 793 fi 794 795 join -111 -211 -v1 $CUR $TMP1 > $OUTPUT 796 if [ -s $OUTPUT ] ; then 797 printf "Device deletions:\n" >> $ERR 798 tee -a $TMP2 < $OUTPUT >> $ERR 799 printf "\n" >> $ERR 800 fi 801 802 # Report any block device change. Ignore 803 # character devices, only the name is 804 # significant. 805 cat $TMP2 $CUR $TMP1 | \ 806 sed -e '/^c/d' | \ 807 sort -k11 | \ 808 sed -e 's/[ ][ ]*/ /g' | \ 809 uniq -u > $OUTPUT 810 if [ -s $OUTPUT ] ; then 811 printf "Block device changes:\n" >> $ERR 812 column -t $OUTPUT >> $ERR 813 printf "\n" >> $ERR 814 fi 815 816 backup_file update $TMP1 $CUR $BACK 817 fi 818 else 819 printf "Device additions:\n" >> $ERR 820 column -t $TMP1 >> $ERR 821 printf "\n" >> $ERR 822 backup_file add $TMP1 $CUR $BACK >> $ERR 823 fi 824 fi 825 if [ -s $ERR ] ; then 826 printf "\nChecking setuid files and devices:\n" 827 cat $ERR 828 printf "\n" 829 fi 830 fi 831 832 # Check special files. 833 # Check system binaries. 834 # 835 # Create the mtree tree specifications using: 836 # mtree -cx -pDIR -kmd5,uid,gid,mode,nlink,size,link,time > DIR.secure 837 # chown root:wheel DIR.secure 838 # chmod u+r,go= DIR.secure 839 # 840 # Note, this is not complete protection against Trojan horsed binaries, as 841 # the hacker can modify the tree specification to match the replaced binary. 842 # For details on really protecting yourself against modified binaries, see 843 # the mtree(8) manual page. 844 # 845 if checkyesno check_mtree; then 846 if checkyesno check_mtree_follow_symlinks; then 847 check_mtree_flags="-L" 848 else 849 check_mtree_flags="" 850 fi 851 mtree -e -l -p / $check_mtree_flags -f $SPECIALSPEC 3>&1 >$OUTPUT 2>&3 | 852 grep -v '^mtree: dev/tty: Device not configured$' >&2 853 if [ -s $OUTPUT ]; then 854 printf "\nChecking special files and directories.\n" 855 cat $OUTPUT 856 fi 857 858 for file in /etc/mtree/*.secure; do 859 [ $file = '/etc/mtree/*.secure' ] && continue 860 tree=$(sed -n -e '3s/.* //p' -e 3q $file) 861 mtree $check_mtree_flags -f $file -p $tree > $TMP1 862 if [ -s $TMP1 ]; then 863 printf "\nChecking $tree:\n" 864 cat $TMP1 865 fi 866 done > $OUTPUT 867 if [ -s $OUTPUT ]; then 868 printf "\nChecking system binaries:\n" 869 cat $OUTPUT 870 fi 871 fi 872 873 # Backup disklabels of available disks 874 # 875 if checkyesno check_disklabels; then 876 # migrate old disklabels 877 for file in $(ls -1d $backup_dir/$backup_dir/disklabel.* \ 878 $backup_dir/disklabel.* 2>/dev/null); do 879 migrate_file "$file" "$work_dir/${file##*/}" 880 done 881 882 # generate list of old disklabels, fdisks & wedges and remove them 883 ls -1d $work_dir/disklabel.* $work_dir/fdisk.* $work_dir/wedges.* 2>/dev/null | 884 egrep -v '\.(backup|current)(,v)?$' > $LABELS 885 xargs rm < $LABELS 886 887 # generate disklabels of all disks excluding: cd dk fd md st 888 disks=$(iostat -x | awk 'NR > 1 && $1 !~ /^[cfm]d|dk|st|nfs/ { print $1; }') 889 for i in $disks; do 890 disklabel $i > "$work_dir/disklabel.$i" 2>/dev/null 891 done 892 893 # if fdisk is available, generate fdisks for: ed ld sd wd 894 if [ -x /sbin/fdisk ]; then 895 disks=$(iostat -x | awk 'NR > 1 && $1 ~ /^[elsw]d/ { print $1; }') 896 for i in $disks; do 897 /sbin/fdisk $i > "$work_dir/fdisk.$i" 2>/dev/null 898 done 899 fi 900 901 # if dkctl is available, generate dkctl listwedges for: ed ld sd wd cgd ofdisk ra rl raid 902 if [ -x /sbin/dkctl ]; then 903 disks=$(iostat -x | awk 'NR > 1 && $1 ~ /^[elsw]d|cgd|ofdisk|r[al]|raid/ { print $1; }') 904 for i in $disks; do 905 /sbin/dkctl $i listwedges > "$work_dir/wedges.$i" 2>/dev/null 906 done 907 fi 908 909 # append list of new disklabels, fdisks and wedges 910 ls -1d $work_dir/disklabel.* $work_dir/fdisk.* $work_dir/wedges.* 2>/dev/null | 911 egrep -v '\.(backup|current)(,v)?$' >> $LABELS 912 CHANGELIST="$LABELS $CHANGELIST" 913 fi 914 915 if checkyesno check_lvm; then 916 917 # generate list of existing LVM elements Physical Volumes, Volume Groups and Logical Volumes. 918 if [ -x /sbin/lvm ]; then 919 lvm pvdisplay -m >"$work_dir/lvm.pv" 2>/dev/null 920 lvm vgdisplay -m >"$work_dir/lvm.vg" 2>/dev/null 921 lvm lvdisplay -m >"$work_dir/lvm.lv" 2>/dev/null 922 fi 923 ls -1d $work_dir/lvm.* 2>/dev/null | 924 egrep -v '\.(backup|current)(,v)?$'>> $LVM_LABELS 925 CHANGELIST="$CHANGELIST $LVM_LABELS" 926 fi 927 928 # Check for changes in the list of installed pkgs 929 # 930 if checkyesno check_pkgs && have_pkgs; then 931 pkgs=$work_dir/pkgs 932 migrate_file "$backup_dir/pkgs" "$pkgs" 933 pkg_dbdir=$(${pkg_admin} config-var PKG_DBDIR) 934 : ${pkg_dbdir:=/var/db/pkg} 935 ( cd $pkg_dbdir 936 $pkg_info | sort 937 echo "" 938 find . \( -name +REQUIRED_BY -o -name +CONTENTS \) -print0 | 939 xargs -0 ls -ldgTq | sort -t. +1 | sed -e 's, \./, ,' 940 ) > $pkgs 941 echo "$pkgs" > $PKGS 942 CHANGELIST="$PKGS $CHANGELIST" 943 fi 944 945 # List of files that get backed up and checked for any modifications. 946 # Any changes cause the files to rotate. 947 # 948 if checkyesno check_changelist ; then 949 mtree -D -k type -f $SPECIALSPEC -E exclude | 950 sed '/^type=file/!d ; s/type=file \.//' | unvis > $CHANGEFILES 951 952 ( 953 # Add other files which might dynamically exist: 954 # /etc/ifconfig.* 955 # /etc/raid*.conf 956 # /etc/rc.d/* 957 # /etc/rc.conf.d/* 958 # 959 echo "/etc/ifconfig.*" 960 echo "/etc/raid*.conf" 961 echo "/etc/rc.d/*" 962 echo "/etc/rc.conf.d/*" 963 echo "/etc/lvm/backup/*" 964 echo "/etc/lvm/archive/*" 965 966 # Add /etc/changelist 967 # 968 if [ -s /etc/changelist ]; then 969 grep -v '^#' /etc/changelist 970 fi 971 ) | while read file; do 972 case "$file" in 973 *[\*\?\[]*) # If changelist line is a glob ... 974 # ... expand possible backup files 975 # 976 ls -1d $(echo $backup_dir/${file}.current) 2>/dev/null \ 977 | sed "s,^$backup_dir/,, ; s,\.current$,," 978 979 # ... expand possible files 980 # 981 ls -1d $(echo $file) 2>/dev/null 982 ;; 983 *) 984 # Otherwise, just print the filename 985 echo $file 986 ;; 987 esac 988 done >> $CHANGEFILES 989 CHANGELIST="$CHANGEFILES $CHANGELIST" 990 fi 991 992 # Special case backups, including the master password file and 993 # ssh private host keys. The normal backup mechanisms for 994 # $check_changelist (see below) also print out the actual file 995 # differences and we don't want to do that for these files 996 # 997 echo $MP > $TMP1 # always add /etc/master.passwd 998 mtree -D -k type -f $SPECIALSPEC -I nodiff | 999 sed '/^type=file/!d ; s/type=file \.//' | unvis >> $TMP1 1000 grep -v '^$' $TMP1 | sort -u > $TMP2 1001 1002 while read file; do 1003 backup_and_diff "$file" no 1004 done < $TMP2 1005 1006 1007 if [ -n "$CHANGELIST" ]; then 1008 grep -h -v '^$' $CHANGELIST | sort -u > $TMP1 1009 comm -23 $TMP1 $TMP2 | while read file; do 1010 backup_and_diff "$file" yes 1011 done 1012 fi 1013 1014 if have_pkgs; then 1015 if checkyesno check_pkg_vulnerabilities; then 1016 ${pkg_admin} ${_compat_K_flag} audit >${OUTPUT} 2>&1 1017 if [ -s ${OUTPUT} ]; then 1018 printf "\nInstalled vulnerable packages:\n" 1019 cat ${OUTPUT} 1020 fi 1021 fi 1022 1023 if checkyesno check_pkg_signatures; then 1024 ${pkg_admin} ${_compat_K_flag} check >${OUTPUT} 2>&1 1025 if [ $? -ne 0 ]; then 1026 printf "\nFiles with invalid signatures:\n" 1027 cat ${OUTPUT} 1028 fi 1029 fi 1030 fi 1031 1032 if [ -f /etc/security.local ]; then 1033 . /etc/security.local > $OUTPUT 2>&1 1034 if [ -s $OUTPUT ] ; then 1035 printf "\nRunning /etc/security.local:\n" 1036 cat $OUTPUT 1037 fi 1038 fi 1039
Indexes created Wed Oct 01 13:09:50 GMT 2025