1#!/bin/sh - 2# 3# $NetBSD: security,v 1.109 2010/12/27 03:38:52 christos 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 24 25# Set reasonable defaults (if they're not set in security.conf) 26# 27backup_dir=${backup_dir:-/var/backups} 28max_loginlen=${max_loginlen:-8} 29max_grouplen=${max_grouplen:-8} 30pkg_info=${pkg_info:-/usr/sbin/pkg_info} 31 32# Other configurable variables 33# 34special_files="/etc/mtree/special /etc/mtree/special.local" 35MP=/etc/master.passwd 36CHANGELIST="" 37work_dir=$backup_dir/work 38 39if [ ! -d "$work_dir" ]; then 40 mkdir -p "$work_dir" 41fi 42 43SECUREDIR=$(mktemp -d -t _securedir) || exit 1 44 45trap "/bin/rm -rf $SECUREDIR ; exit 0" EXIT INT QUIT PIPE 46 47if ! cd "$SECUREDIR"; then 48 echo "Can not cd to $SECUREDIR". 49 exit 1 50fi 51 52ERR=err.$$ 53TMP1=tmp1.$$ 54TMP2=tmp2.$$ 55MPBYUID=mpbyuid.$$ 56MPBYPATH=mpbypath.$$ 57LIST=list.$$ 58OUTPUT=output.$$ 59LABELS=labels.$$ 60LVM_LABELS=lvm.$$ 61PKGS=pkgs.$$ 62CHANGEFILES=changefiles.$$ 63SPECIALSPEC=specialspec.$$ 64 65if [ -n "${pkgdb_dir}" ]; then 66 echo "WARNING: Setting pkgdb_dir in security.conf(5) is deprecated" 67 echo "WARNING: Please define PKG_DBDIR in pkg_install.conf(5) instead" 68 _compat_K_flag="-K ${pkgdb_dir}" 69fi 70 71have_pkgs() { 72 $pkg_info ${_compat_K_flag} -q -E '*' 73} 74 75# migrate_file old new 76# Determine if the "${old}" path name needs to be migrated to the 77# "${new}" path. Also checks if "${old}.current" needs migrating, 78# and if so, migrate it and possibly "${old}.current,v" and 79# "${old}.backup". 80# 81migrate_file() 82{ 83 _old=$1 84 _new=$2 85 if [ -z "$_old" -o -z "$_new" ]; then 86 err 3 "USAGE: migrate_file old new" 87 fi 88 if [ ! -d "${_new%/*}" ]; then 89 mkdir -p "${_new%/*}" 90 fi 91 if [ -f "${_old}" -a ! -f "${_new}" ]; then 92 echo "==> migrating ${_old}" 93 echo " to ${_new}" 94 mv "${_old}" "${_new}" 95 fi 96 if [ -f "${_old}.current" -a ! -f "${_new}.current" ]; then 97 echo "==> migrating ${_old}.current" 98 echo " to ${_new}.current" 99 mv "${_old}.current" "${_new}.current" 100 if [ -f "${_old}.current,v" -a ! -f "${_new}.current,v" ]; then 101 echo "==> migrating ${_old}.current,v" 102 echo " to ${_new}.current,v" 103 mv "${_old}.current,v" "${_new}.current,v" 104 fi 105 if [ -f "${_old}.backup" -a ! -f "${_new}.backup" ]; then 106 echo "==> migrating ${_old}.backup" 107 echo " to ${_new}.backup" 108 mv "${_old}.backup" "${_new}.backup" 109 fi 110 fi 111} 112 113 114# backup_and_diff file printdiff 115# Determine if file needs backing up, and if so, do it. 116# If printdiff is yes, display the diffs, otherwise 117# just print a message saying "[changes omitted]". 118# 119backup_and_diff() 120{ 121 _file=$1 122 _printdiff=$2 123 if [ -z "$_file" -o -z "$_printdiff" ]; then 124 err 3 "USAGE: backup_and_diff file printdiff" 125 fi 126 ! checkyesno _printdiff 127 _printdiff=$? 128 129 _old=$backup_dir/${_file##*/} 130 case "$_file" in 131 $work_dir/*) 132 _new=$_file 133 migrate_file "$backup_dir/$_old" "$_new" 134 migrate_file "$_old" "$_new" 135 ;; 136 *) 137 _new=$backup_dir/$_file 138 migrate_file "$_old" "$_new" 139 ;; 140 esac 141 CUR=${_new}.current 142 BACK=${_new}.backup 143 if [ -f $_file ]; then 144 if [ -f $CUR ] ; then 145 if [ "$_printdiff" -ne 0 ]; then 146 diff ${diff_options} $CUR $_file > $OUTPUT 147 else 148 if ! cmp -s $CUR $_file; then 149 echo "[changes omitted]" 150 fi > $OUTPUT 151 fi 152 if [ -s $OUTPUT ] ; then 153 printf \ 154 "\n======\n%s diffs (OLD < > NEW)\n======\n" $_file 155 cat $OUTPUT 156 backup_file update $_file $CUR $BACK 157 fi 158 else 159 printf "\n======\n%s added\n======\n" $_file 160 if [ "$_printdiff" -ne 0 ]; then 161 diff ${diff_options} /dev/null $_file 162 else 163 echo "[changes omitted]" 164 fi 165 backup_file add $_file $CUR $BACK 166 fi 167 else 168 if [ -f $CUR ]; then 169 printf "\n======\n%s removed\n======\n" $_file 170 if [ "$_printdiff" -ne 0 ]; then 171 diff ${diff_options} $CUR /dev/null 172 else 173 echo "[changes omitted]" 174 fi 175 backup_file remove $_file $CUR $BACK 176 fi 177 fi 178} 179 180 181# These are used several times. 182# 183awk -F: '!/^\+/ { print $1 " " $3 }' $MP | sort -k2n > $MPBYUID 184awk -F: '{ print $1 " " $9 }' $MP | sort -k2 > $MPBYPATH 185for file in $special_files; do 186 [ -s $file ] && cat $file 187done | mtree -CM -k all > $SPECIALSPEC || exit 1 188 189 190# Check the master password file syntax. 191# 192if checkyesno check_passwd; then 193 # XXX: the sense of permit_star is reversed; the code works as 194 # implemented, but usage needs to be negated. 195 checkyesno check_passwd_permit_star && permit_star=0 || permit_star=1 196 checkyesno check_passwd_permit_nonalpha \ 197 && permit_nonalpha=1 || permit_nonalpha=0 198 199 awk -v "len=$max_loginlen" \ 200 -v "nowarn_shells_list=$check_passwd_nowarn_shells" \ 201 -v "nowarn_users_list=$check_passwd_nowarn_users" \ 202 -v "permit_star=$permit_star" \ 203 -v "permit_nonalpha=$permit_nonalpha" \ 204 ' 205 BEGIN { 206 while ( getline < "/etc/shells" > 0 ) { 207 if ($0 ~ /^\#/ || $0 ~ /^$/ ) 208 continue; 209 shells[$1]++; 210 } 211 split(nowarn_shells_list, a); 212 for (i in a) nowarn_shells[a[i]]++; 213 split(nowarn_users_list, a); 214 for (i in a) nowarn_users[a[i]]++; 215 uid0_users_list="root toor" 216 split(uid0_users_list, a); 217 for (i in a) uid0_users[a[i]]++; 218 FS=":"; 219 } 220 221 { 222 if ($0 ~ /^[ ]*$/) { 223 printf "Line %d is a blank line.\n", NR; 224 next; 225 } 226 227 # NIS compat entry? 228 compatline = $1 ~ "^[\\+-]"; 229 if (compatline) { 230 if ($1 == "+" && NF == 1) { 231 next; 232 } 233 sub("^.", "", $1); 234 } 235 if (NF != 10) 236 printf "Line %d has the wrong number of fields.\n", NR; 237 if (compatline) { 238 if ($3 == 0) 239 printf "Line %d includes entries with uid 0.\n", 240 NR; 241 if ($1 == "") 242 next; 243 } 244 if (!permit_nonalpha && 245 $1 !~ /^[_A-Za-z0-9]([-A-Za-z0-9_.]*[A-Za-z0-9])*$/) 246 printf "Login %s has non-alphanumeric characters.\n", 247 $1; 248 if (length($1) > len) 249 printf "Login %s has more than "len" characters.\n", 250 $1; 251 if ($2 == "" && !compatline && !nowarn_users[$1]) 252 printf "Login %s has no password.\n", $1; 253 if (!nowarn_shells[$10] && !nowarn_users[$1]) { 254 if (length($2) != 13 && 255 length($2) != 20 && 256 $2 !~ /^\$1/ && 257 $2 !~ /^\$2/ && 258 $2 !~ /^\$sha1/ && 259 $2 != "" && 260 (permit_star || $2 != "*") && 261 $2 !~ /^\*[A-z-]+$/ && 262 $1 != "toor") { 263 if ($10 == "" || shells[$10]) 264 printf "Login %s is off but still has "\ 265 "a valid shell (%s)\n", $1, $10; 266 } else if (compatline && $10 == "") { 267 # nothing 268 } else if (! shells[$10]) 269 printf "Login %s does not have a valid "\ 270 "shell (%s)\n", $1, $10; 271 } 272 if ($3 == 0 && !uid0_users[$1] && !nowarn_users[$1]) 273 printf "Login %s has a user id of 0.\n", $1; 274 if ($3 != "" && $3 < 0) 275 printf "Login %s has a negative user id.\n", $1; 276 if ($4 != "" && $4 < 0) 277 printf "Login %s has a negative group id.\n", $1; 278 }' < $MP > $OUTPUT 279 if [ -s $OUTPUT ] ; then 280 printf "\nChecking the $MP file:\n" 281 cat $OUTPUT 282 fi 283 284 awk -F: '{ print $1 }' $MP | sort | uniq -d > $OUTPUT 285 if [ -s $OUTPUT ] ; then 286 printf "\n$MP has duplicate user names.\n" 287 column $OUTPUT 288 fi 289 290# To not exclude 'toor', a standard duplicate root account, from the duplicate 291# account test, uncomment the line below (without egrep in it)and comment 292# out the line (with egrep in it) below it. 293# 294# < $MPBYUID uniq -d -f 1 | awk '{ print $2 }' > $TMP2 295 < $MPBYUID egrep -v '^toor ' | uniq -d -f 1 | awk '{ print $2 }' > $TMP2 296 if [ -s $TMP2 ] ; then 297 printf "\n$MP has duplicate user id's.\n" 298 while read uid; do 299 grep -w $uid $MPBYUID 300 done < $TMP2 | column 301 fi 302fi 303 304# Check the group file syntax. 305# 306if checkyesno check_group; then 307 GRP=/etc/group 308 awk -F: -v "len=$max_grouplen" '{ 309 if ($0 ~ /^[ ]*$/) { 310 printf "Line %d is a blank line.\n", NR; 311 next; 312 } 313 if (NF != 4 && ($1 != "+" || NF != 1)) 314 printf "Line %d has the wrong number of fields.\n", NR; 315 if ($1 == "+" ) { 316 next; 317 } 318 if ($1 !~ /^[_A-Za-z0-9]([-A-Za-z0-9_.]*[A-Za-z0-9])*$/) 319 printf "Group %s has non-alphanumeric characters.\n", 320 $1; 321 if (length($1) > len) 322 printf "Group %s has more than "len" characters.\n", $1; 323 if ($3 !~ /[0-9]*/) 324 printf "Login %s has a negative group id.\n", $1; 325 }' < $GRP > $OUTPUT 326 if [ -s $OUTPUT ] ; then 327 printf "\nChecking the $GRP file:\n" 328 cat $OUTPUT 329 fi 330 331 awk -F: '{ print $1 }' $GRP | sort | uniq -d > $OUTPUT 332 if [ -s $OUTPUT ] ; then 333 printf "\n$GRP has duplicate group names.\n" 334 column $OUTPUT 335 fi 336fi 337 338# Check for root paths, umask values in startup files. 339# The check for the root paths is problematical -- it's likely to fail 340# in other environments. Once the shells have been modified to warn 341# of '.' in the path, the path tests should go away. 342# 343if checkyesno check_rootdotfiles; then 344 rhome=~root 345 umaskset=no 346 list="/etc/csh.cshrc /etc/csh.login ${rhome}/.cshrc ${rhome}/.login" 347 for i in $list ; do 348 if [ -f $i ] ; then 349 if egrep '^[ \t]*umask[ \t]+[0-7]+' $i > /dev/null ; 350 then 351 umaskset=yes 352 fi 353 # Double check the umask value itself; ensure that 354 # both the group and other write bits are set. 355 # 356 egrep '^[ \t]*umask[ \t]+[0-7]+' $i | 357 awk '{ 358 if ($2 ~ /^.$/ || $2 ~! /[^2367].$/) { 359 print "\tRoot umask is group writable" 360 } 361 if ($2 ~ /[^2367]$/) { 362 print "\tRoot umask is other writable" 363 } 364 }' | sort -u 365 SAVE_PATH=$PATH 366 unset PATH 367 /bin/csh -f -s << end-of-csh > /dev/null 2>&1 368 source $i 369 /bin/ls -ldgT \$path > $TMP1 370end-of-csh 371 export PATH=$SAVE_PATH 372 awk '{ 373 if ($10 ~ /^\.$/) { 374 print "\tThe root path includes ."; 375 next; 376 } 377 } 378 $1 ~ /^d....w/ \ 379 { print "\tRoot path directory " $10 " is group writable." } \ 380 $1 ~ /^d.......w/ \ 381 { print "\tRoot path directory " $10 " is other writable." }' \ 382 < $TMP1 383 fi 384 done > $OUTPUT 385 if [ $umaskset = "no" -o -s $OUTPUT ] ; then 386 printf "\nChecking root csh paths, umask values:\n$list\n\n" 387 if [ -s $OUTPUT ]; then 388 cat $OUTPUT 389 fi 390 if [ $umaskset = "no" ] ; then 391 printf "\tRoot csh startup files do not set the umask.\n" 392 fi 393 fi 394 395 umaskset=no 396 list="/etc/profile ${rhome}/.profile" 397 for i in $list; do 398 if [ -f $i ] ; then 399 if egrep umask $i > /dev/null ; then 400 umaskset=yes 401 fi 402 egrep umask $i | 403 awk '$2 ~ /^.$/ || $2 ~ /[^2367].$/ \ 404 { print "\tRoot umask is group writable" } \ 405 $2 ~ /[^2367]$/ \ 406 { print "\tRoot umask is other writable" }' 407 SAVE_PATH=$PATH 408 unset PATH 409 /bin/sh << end-of-sh > /dev/null 2>&1 410 . $i 411 list=\$(echo \$PATH | /usr/bin/sed -e \ 412 's/^:/.:/;s/:$/:./;s/::/:.:/g;s/:/ /g') 413 /bin/ls -ldgT \$list > $TMP1 414end-of-sh 415 export PATH=$SAVE_PATH 416 awk '{ 417 if ($10 ~ /^\.$/) { 418 print "\tThe root path includes ."; 419 next; 420 } 421 } 422 $1 ~ /^d....w/ \ 423 { print "\tRoot path directory " $10 " is group writable." } \ 424 $1 ~ /^d.......w/ \ 425 { print "\tRoot path directory " $10 " is other writable." }' \ 426 < $TMP1 427 428 fi 429 done > $OUTPUT 430 if [ $umaskset = "no" -o -s $OUTPUT ] ; then 431 printf "\nChecking root sh paths, umask values:\n$list\n" 432 if [ -s $OUTPUT ]; then 433 cat $OUTPUT 434 fi 435 if [ $umaskset = "no" ] ; then 436 printf "\tRoot sh startup files do not set the umask.\n" 437 fi 438 fi 439fi 440 441# Root and uucp should both be in /etc/ftpusers. 442# 443if checkyesno check_ftpusers; then 444 list="uucp "$(awk '$2 == 0 { print $1 }' $MPBYUID) 445 for i in $list; do 446 if /usr/libexec/ftpd -C $i ; then 447 printf "\t$i is not denied\n" 448 fi 449 done > $OUTPUT 450 if [ -s $OUTPUT ]; then 451 printf "\nChecking the /etc/ftpusers configuration:\n" 452 cat $OUTPUT 453 fi 454fi 455 456# Uudecode should not be in the /etc/mail/aliases file. 457# 458if checkyesno check_aliases; then 459 for f in /etc/mail/aliases /etc/aliases; do 460 if [ -f $f ] && egrep '^[^#]*(uudecode|decode).*\|' $f; then 461 printf "\nEntry for uudecode in $f file.\n" 462 fi 463 done 464fi 465 466# Files that should not have + signs. 467# 468if checkyesno check_rhosts; then 469 list="/etc/hosts.equiv /etc/hosts.lpd" 470 for f in $list ; do 471 if [ -f $f ] && egrep '\+' $f > /dev/null ; then 472 printf "\nPlus sign in $f file.\n" 473 fi 474 done 475 476 # Check for special users with .rhosts files. Only root and toor should 477 # have .rhosts files. Also, .rhosts files should not have plus signs. 478 awk -F: '$1 != "root" && $1 != "toor" && \ 479 ($3 < 100 || $1 == "ftp" || $1 == "uucp") \ 480 { print $1 " " $9 }' $MP | 481 sort -k2 | 482 while read uid homedir; do 483 if [ -f ${homedir}/.rhosts ] ; then 484 rhost=$(ls -ldgT ${homedir}/.rhosts) 485 printf -- "$uid: $rhost\n" 486 fi 487 done > $OUTPUT 488 if [ -s $OUTPUT ] ; then 489 printf "\nChecking for special users with .rhosts files.\n" 490 cat $OUTPUT 491 fi 492 493 while read uid homedir; do 494 if [ -f ${homedir}/.rhosts -a -r ${homedir}/.rhosts ] && \ 495 cat -f ${homedir}/.rhosts | egrep '\+' > /dev/null ; then 496 printf -- "$uid: + in .rhosts file.\n" 497 fi 498 done < $MPBYPATH > $OUTPUT 499 if [ -s $OUTPUT ] ; then 500 printf "\nChecking .rhosts files syntax.\n" 501 cat $OUTPUT 502 fi 503fi 504 505# Check home directories. Directories should not be owned by someone else 506# or writable. 507# 508if checkyesno check_homes; then 509 checkyesno check_homes_permit_usergroups && \ 510 permit_usergroups=1 || permit_usergroups=0 511 while read uid homedir; do 512 if [ -d ${homedir}/ ] ; then 513 file=$(ls -ldgT ${homedir}) 514 printf -- "$uid $file\n" 515 fi 516 done < $MPBYPATH | 517 awk -v "usergroups=$permit_usergroups" ' 518 $1 != $4 && $4 != "root" \ 519 { print "user " $1 " home directory is owned by " $4 } 520 $2 ~ /^d....w/ && (!usergroups || $5 != $1) \ 521 { print "user " $1 " home directory is group writable" } 522 $2 ~ /^d.......w/ \ 523 { print "user " $1 " home directory is other writable" }' \ 524 > $OUTPUT 525 if [ -s $OUTPUT ] ; then 526 printf "\nChecking home directories.\n" 527 cat $OUTPUT 528 fi 529 530 # Files that should not be owned by someone else or readable. 531 list=".Xauthority .netrc .ssh/id_dsa .ssh/id_rsa .ssh/identity" 532 while read uid homedir; do 533 for f in $list ; do 534 file=${homedir}/${f} 535 if [ -f $file ] ; then 536 printf -- "$uid $f $(ls -ldgT $file)\n" 537 fi 538 done 539 done < $MPBYPATH | 540 awk -v "usergroups=$permit_usergroups" ' 541 $1 != $5 && $5 != "root" \ 542 { print "user " $1 " " $2 " file is owned by " $5 } 543 $3 ~ /^-...r/ && (!usergroups || $6 != $1) \ 544 { print "user " $1 " " $2 " file is group readable" } 545 $3 ~ /^-......r/ \ 546 { print "user " $1 " " $2 " file is other readable" } 547 $3 ~ /^-....w/ && (!usergroups || $6 != $1) \ 548 { print "user " $1 " " $2 " file is group writable" } 549 $3 ~ /^-.......w/ \ 550 { print "user " $1 " " $2 " file is other writable" }' \ 551 > $OUTPUT 552 553 # Files that should not be owned by someone else or writable. 554 list=".bash_history .bash_login .bash_logout .bash_profile .bashrc \ 555 .cshrc .emacs .exrc .forward .history .k5login .klogin .login \ 556 .logout .profile .qmail .rc_history .rhosts .shosts ssh .tcshrc \ 557 .twmrc .xinitrc .xsession .ssh/authorized_keys \ 558 .ssh/authorized_keys2 .ssh/config .ssh/id_dsa.pub \ 559 .ssh/id_rsa.pub .ssh/identity.pub .ssh/known_hosts \ 560 .ssh/known_hosts2" 561 while read uid homedir; do 562 for f in $list ; do 563 file=${homedir}/${f} 564 if [ -f $file ] ; then 565 printf -- "$uid $f $(ls -ldgT $file)\n" 566 fi 567 done 568 done < $MPBYPATH | 569 awk -v "usergroups=$permit_usergroups" ' 570 $1 != $5 && $5 != "root" \ 571 { print "user " $1 " " $2 " file is owned by " $5 } 572 $3 ~ /^-....w/ && (!usergroups || $6 != $1) \ 573 { print "user " $1 " " $2 " file is group writable" } 574 $3 ~ /^-.......w/ \ 575 { print "user " $1 " " $2 " file is other writable" }' \ 576 >> $OUTPUT 577 if [ -s $OUTPUT ] ; then 578 printf "\nChecking dot files.\n" 579 cat $OUTPUT 580 fi 581fi 582 583# Mailboxes should be owned by user and unreadable. 584# 585if checkyesno check_varmail; then 586 ls -lA /var/mail | \ 587 awk ' NR == 1 { next; } 588 $9 ~ /^\./ {next; } 589 $3 != $9 { 590 print "user " $9 " mailbox is owned by " $3 591 } 592 $1 != "-rw-------" { 593 print "user " $9 " mailbox is " $1 ", group " $4 594 }' > $OUTPUT 595 if [ -s $OUTPUT ] ; then 596 printf "\nChecking mailbox ownership.\n" 597 cat $OUTPUT 598 fi 599fi 600 601# NFS exports shouldn't be globally exported 602# 603if checkyesno check_nfs && [ -f /etc/exports ]; then 604 awk '{ 605 # ignore comments and blank lines 606 if ($0 ~ /^\#/ || $0 ~ /^$/ ) 607 next; 608 # manage line continuation 609 while ($NF ~ /^\\$/) { 610 $NF = ""; 611 line = $0 ""; 612 getline; 613 $0 = line $0 ""; 614 } 615 616 delete dir; 617 readonly = ndir = 0; 618 for (i = 1; i <= NF; ++i) { 619 if ($i ~ /^\//) dir[ndir++] = $i; 620 else if ($i ~ /^-/) { 621 if ($i ~ /^-(ro|o)$/) readonly = 1; 622 if ($i ~ /^-network/) next; 623 } 624 else next; 625 } 626 if (readonly) 627 for (item in dir) 628 rodir[nrodir++] = dir[item]; 629 else 630 for (item in dir) 631 rwdir[nrwdir++] = dir[item]; 632 633 } 634 635 END { 636 if (nrodir) { 637 printf("Globally exported file system%s, read-only:\n", 638 nrodir > 1 ? "s" : ""); 639 for (item in rodir) 640 printf("\t%s\n", rodir[item]); 641 } 642 if (nrwdir) { 643 printf("Globally exported file system%s, read-write:\n", 644 nrwdir > 1 ? "s" : ""); 645 for (item in rwdir) 646 printf("\t%s\n", rwdir[item]); 647 } 648 }' < /etc/exports > $OUTPUT 649 if [ -s $OUTPUT ] ; then 650 printf "\nChecking for globally exported file systems.\n" 651 cat $OUTPUT 652 fi 653fi 654 655# Display any changes in setuid files and devices. 656# 657if checkyesno check_devices; then 658 > $ERR 659 ( 660 661 # Convert check_devices_ignore_fstypes="foo !bar bax" 662 # into "-fstype foo -o ! -fstype bar -o -fstype bax" 663 # and check_devices_ignore_paths="/foo !/bar /bax" 664 # into " -path /foo -o ! -path /bar -o -path /bax" 665 # 666 ignexpr=$(\ 667 echo $check_devices_ignore_fstypes | \ 668 sed -e's/\(!*\)\([^[:space:]]\{1,\}\)/-o \1 -fstype \2/g' ; \ 669 echo $check_devices_ignore_paths | \ 670 sed -e's/\(!*\)\([^[:space:]]\{1,\}\)/-o \1 -path \2/g' \ 671 ) 672 673 # Massage the expression into ( $ignexpr ) -a -prune -o 674 if [ -n "${ignexpr}" ]; then 675 ignexpr=$(\ 676 echo $ignexpr | \ 677 sed -e 's/^-o /( /' \ 678 -e 's/$/ ) -a -prune -o/' \ 679 ) 680 fi 681 682 find / $ignexpr \ 683 \( \( -perm -u+s -a ! -type d \) -o \ 684 \( -perm -g+s -a ! -type d \) -o \ 685 -type b -o -type c \) -print0 | \ 686 xargs -0 ls -ldgTq | sort +9 > $LIST 687 688 ) 2> $OUTPUT 689 690 # Display any errors that occurred during system file walk. 691 if [ -s $OUTPUT ] ; then 692 printf "Setuid/device find errors:\n" >> $ERR 693 cat $OUTPUT >> $ERR 694 printf "\n" >> $ERR 695 fi 696 697 # Display any changes in the setuid file list. 698 egrep -v '^[bc]' $LIST > $TMP1 699 if [ -s $TMP1 ] ; then 700 # Check to make sure uudecode isn't setuid. 701 if grep -w uudecode $TMP1 > /dev/null ; then 702 printf "\nUudecode is setuid.\n" >> $ERR 703 fi 704 705 file=$work_dir/setuid 706 migrate_file "$backup_dir/setuid" "$file" 707 CUR=${file}.current 708 BACK=${file}.backup 709 if [ -s $CUR ] ; then 710 if cmp -s $CUR $TMP1 ; then 711 : 712 else 713 > $TMP2 714 join -110 -210 -v2 $CUR $TMP1 > $OUTPUT 715 if [ -s $OUTPUT ] ; then 716 printf "Setuid additions:\n" >> $ERR 717 tee -a $TMP2 < $OUTPUT >> $ERR 718 printf "\n" >> $ERR 719 fi 720 721 join -110 -210 -v1 $CUR $TMP1 > $OUTPUT 722 if [ -s $OUTPUT ] ; then 723 printf "Setuid deletions:\n" >> $ERR 724 tee -a $TMP2 < $OUTPUT >> $ERR 725 printf "\n" >> $ERR 726 fi 727 728 sort -k10 $TMP2 $CUR $TMP1 | \ 729 sed -e 's/[ ][ ]*/ /g' | \ 730 uniq -u > $OUTPUT 731 if [ -s $OUTPUT ] ; then 732 printf "Setuid changes:\n" >> $ERR 733 column -t $OUTPUT >> $ERR 734 printf "\n" >> $ERR 735 fi 736 737 backup_file update $TMP1 $CUR $BACK 738 fi 739 else 740 printf "Setuid additions:\n" >> $ERR 741 column -t $TMP1 >> $ERR 742 printf "\n" >> $ERR 743 backup_file add $TMP1 $CUR $BACK 744 fi 745 fi 746 747 # Check for block and character disk devices that are readable or 748 # writable or not owned by root.operator. 749 >$TMP1 750 DISKLIST="ccd ch hk hp ld md ra raid rb rd rl rx \ 751 sd se ss uk up vnd wd xd xy" 752# DISKLIST="$DISKLIST ct mt st wt" 753 for i in $DISKLIST; do 754 egrep "^b.*/${i}[0-9][0-9]*[a-p]$" $LIST >> $TMP1 755 egrep "^c.*/r${i}[0-9][0-9]*[a-p]$" $LIST >> $TMP1 756 done 757 758 awk '$3 != "root" || $4 != "operator" || $1 !~ /.rw-r-----/ \ 759 { printf "Disk %s is user %s, group %s, permissions %s.\n", \ 760 $11, $3, $4, $1; }' < $TMP1 > $OUTPUT 761 if [ -s $OUTPUT ] ; then 762 printf "\nChecking disk ownership and permissions.\n" >> $ERR 763 cat $OUTPUT >> $ERR 764 printf "\n" >> $ERR 765 fi 766 767 # Display any changes in the device file list. 768 egrep '^[bc]' $LIST | sort -k11 > $TMP1 769 if [ -s $TMP1 ] ; then 770 file=$work_dir/device 771 migrate_file "$backup_dir/device" "$file" 772 CUR=${file}.current 773 BACK=${file}.backup 774 775 if [ -s $CUR ] ; then 776 if cmp -s $CUR $TMP1 ; then 777 : 778 else 779 > $TMP2 780 join -111 -211 -v2 $CUR $TMP1 > $OUTPUT 781 if [ -s $OUTPUT ] ; then 782 printf "Device additions:\n" >> $ERR 783 tee -a $TMP2 < $OUTPUT >> $ERR 784 printf "\n" >> $ERR 785 fi 786 787 join -111 -211 -v1 $CUR $TMP1 > $OUTPUT 788 if [ -s $OUTPUT ] ; then 789 printf "Device deletions:\n" >> $ERR 790 tee -a $TMP2 < $OUTPUT >> $ERR 791 printf "\n" >> $ERR 792 fi 793 794 # Report any block device change. Ignore 795 # character devices, only the name is 796 # significant. 797 cat $TMP2 $CUR $TMP1 | \ 798 sed -e '/^c/d' | \ 799 sort -k11 | \ 800 sed -e 's/[ ][ ]*/ /g' | \ 801 uniq -u > $OUTPUT 802 if [ -s $OUTPUT ] ; then 803 printf "Block device changes:\n" >> $ERR 804 column -t $OUTPUT >> $ERR 805 printf "\n" >> $ERR 806 fi 807 808 backup_file update $TMP1 $CUR $BACK 809 fi 810 else 811 printf "Device additions:\n" >> $ERR 812 column -t $TMP1 >> $ERR 813 printf "\n" >> $ERR 814 backup_file add $TMP1 $CUR $BACK >> $ERR 815 fi 816 fi 817 if [ -s $ERR ] ; then 818 printf "\nChecking setuid files and devices:\n" 819 cat $ERR 820 printf "\n" 821 fi 822fi 823 824# Check special files. 825# Check system binaries. 826# 827# Create the mtree tree specifications using: 828# mtree -cx -pDIR -kmd5,uid,gid,mode,nlink,size,link,time > DIR.secure 829# chown root:wheel DIR.secure 830# chmod u+r,go= DIR.secure 831# 832# Note, this is not complete protection against Trojan horsed binaries, as 833# the hacker can modify the tree specification to match the replaced binary. 834# For details on really protecting yourself against modified binaries, see 835# the mtree(8) manual page. 836# 837if checkyesno check_mtree; then 838 if checkyesno check_mtree_follow_symlinks; then 839 check_mtree_flags="-L" 840 else 841 check_mtree_flags="" 842 fi 843 mtree -e -l -p / $check_mtree_flags -f $SPECIALSPEC 3>&1 >$OUTPUT 2>&3 | 844 grep -v '^mtree: dev/tty: Device not configured$' >&2 845 if [ -s $OUTPUT ]; then 846 printf "\nChecking special files and directories.\n" 847 cat $OUTPUT 848 fi 849 850 for file in /etc/mtree/*.secure; do 851 [ $file = '/etc/mtree/*.secure' ] && continue 852 tree=$(sed -n -e '3s/.* //p' -e 3q $file) 853 mtree $check_mtree_flags -f $file -p $tree > $TMP1 854 if [ -s $TMP1 ]; then 855 printf "\nChecking $tree:\n" 856 cat $TMP1 857 fi 858 done > $OUTPUT 859 if [ -s $OUTPUT ]; then 860 printf "\nChecking system binaries:\n" 861 cat $OUTPUT 862 fi 863fi 864 865# Backup disklabels of available disks 866# 867if checkyesno check_disklabels; then 868 # migrate old disklabels 869 for file in $(ls -1d $backup_dir/$backup_dir/disklabel.* \ 870 $backup_dir/disklabel.* 2>/dev/null); do 871 migrate_file "$file" "$work_dir/${file##*/}" 872 done 873 874 # generate list of old disklabels, fdisks & wedges and remove them 875 ls -1d $work_dir/disklabel.* $work_dir/fdisk.* $work_dir/wedges.* 2>/dev/null | 876 egrep -v '\.(backup|current)(,v)?$' > $LABELS 877 xargs rm < $LABELS 878 879 # generate disklabels of all disks excluding: cd dk fd md st 880 disks=$(iostat -x | awk 'NR > 1 && $1 !~ /^[cfm]d|dk|st|nfs/ { print $1; }') 881 for i in $disks; do 882 disklabel $i > "$work_dir/disklabel.$i" 2>/dev/null 883 done 884 885 # if fdisk is available, generate fdisks for: ed ld sd wd 886 if [ -x /sbin/fdisk ]; then 887 disks=$(iostat -x | awk 'NR > 1 && $1 ~ /^[elsw]d/ { print $1; }') 888 for i in $disks; do 889 /sbin/fdisk $i > "$work_dir/fdisk.$i" 2>/dev/null 890 done 891 fi 892 893 # if dkctl is available, generate dkctl listwedges for: ed ld sd wd cgd ofdisk ra rl raid 894 if [ -x /sbin/dkctl ]; then 895 disks=$(iostat -x | awk 'NR > 1 && $1 ~ /^[elsw]d|cgd|ofdisk|r[al]|raid/ { print $1; }') 896 for i in $disks; do 897 /sbin/dkctl $i listwedges > "$work_dir/wedges.$i" 2>/dev/null 898 done 899 fi 900 901 # append list of new disklabels, fdisks and wedges 902 ls -1d $work_dir/disklabel.* $work_dir/fdisk.* $work_dir/wedges.* 2>/dev/null | 903 egrep -v '\.(backup|current)(,v)?$' >> $LABELS 904 CHANGELIST="$LABELS $CHANGELIST" 905fi 906 907if checkyesno check_lvm; then 908 909 # generate list of existing LVM elements Physical Volumes, Volume Groups and Logical Volumes. 910if [ -x /sbin/lvm ]; then 911 lvm pvdisplay -m >"$work_dir/lvm.pv" 2>/dev/null 912 lvm vgdisplay -m >"$work_dir/lvm.vg" 2>/dev/null 913 lvm lvdisplay -m >"$work_dir/lvm.lv" 2>/dev/null 914fi 915 ls -1d $work_dir/lvm.* 2>/dev/null | 916 egrep -v '\.(backup|current)(,v)?$'>> $LVM_LABELS 917 CHANGELIST="$CHANGELIST $LVM_LABELS" 918fi 919 920# Check for changes in the list of installed pkgs 921# 922if checkyesno check_pkgs && have_pkgs; then 923 pkgs=$work_dir/pkgs 924 migrate_file "$backup_dir/pkgs" "$pkgs" 925 pkg_dbdir=$(pkg_admin config-var PKG_DBDIR) 926 : ${pkg_dbdir:=/var/db/pkg} 927 ( cd $pkg_dbdir 928 $pkg_info | sort 929 echo "" 930 find . \( -name +REQUIRED_BY -o -name +CONTENTS \) -print0 | 931 xargs -0 ls -ldgTq | sort -t. +1 | sed -e 's, \./, ,' 932 ) > $pkgs 933 echo "$pkgs" > $PKGS 934 CHANGELIST="$PKGS $CHANGELIST" 935fi 936 937# List of files that get backed up and checked for any modifications. 938# Any changes cause the files to rotate. 939# 940if checkyesno check_changelist ; then 941 mtree -D -k type -f $SPECIALSPEC -E exclude | 942 sed '/^type=file/!d ; s/type=file \.//' | unvis > $CHANGEFILES 943 944 ( 945 # Add other files which might dynamically exist: 946 # /etc/ifconfig.* 947 # /etc/raid*.conf 948 # /etc/rc.d/* 949 # /etc/rc.conf.d/* 950 # 951 echo "/etc/ifconfig.*" 952 echo "/etc/raid*.conf" 953 echo "/etc/rc.d/*" 954 echo "/etc/rc.conf.d/*" 955 echo "/etc/lvm/backup/*" 956 echo "/etc/lvm/archive/*" 957 958 # Add /etc/changelist 959 # 960 if [ -s /etc/changelist ]; then 961 grep -v '^#' /etc/changelist 962 fi 963 ) | while read file; do 964 case "$file" in 965 *[\*\?\[]*) # If changelist line is a glob ... 966 # ... expand possible backup files 967 # 968 ls -1d $(echo $backup_dir/${file}.current) 2>/dev/null \ 969 | sed "s,^$backup_dir/,, ; s,\.current$,," 970 971 # ... expand possible files 972 # 973 ls -1d $(echo $file) 2>/dev/null 974 ;; 975 *) 976 # Otherwise, just print the filename 977 echo $file 978 ;; 979 esac 980 done >> $CHANGEFILES 981 CHANGELIST="$CHANGEFILES $CHANGELIST" 982fi 983 984# Special case backups, including the master password file and 985# ssh private host keys. The normal backup mechanisms for 986# $check_changelist (see below) also print out the actual file 987# differences and we don't want to do that for these files 988# 989echo $MP > $TMP1 # always add /etc/master.passwd 990mtree -D -k type -f $SPECIALSPEC -I nodiff | 991 sed '/^type=file/!d ; s/type=file \.//' | unvis >> $TMP1 992grep -v '^$' $TMP1 | sort -u > $TMP2 993 994while read file; do 995 backup_and_diff "$file" no 996done < $TMP2 997 998 999if [ -n "$CHANGELIST" ]; then 1000 grep -h -v '^$' $CHANGELIST | sort -u > $TMP1 1001 comm -23 $TMP1 $TMP2 | while read file; do 1002 backup_and_diff "$file" yes 1003 done 1004fi 1005 1006if have_pkgs; then 1007 if checkyesno check_pkg_vulnerabilities; then 1008 pkg_admin ${_compat_K_flag} audit >${OUTPUT} 2>&1 1009 if [ -s ${OUTPUT} ]; then 1010 printf "\nInstalled vulnerable packages:\n" 1011 cat ${OUTPUT} 1012 fi 1013 fi 1014 1015 if checkyesno check_pkg_signatures; then 1016 pkg_admin ${_compat_K_flag} check >${OUTPUT} 2>&1 1017 if [ $? -ne 0 ]; then 1018 printf "\nFiles with invalid signatures:\n" 1019 cat ${OUTPUT} 1020 fi 1021 fi 1022fi 1023 1024if [ -f /etc/security.local ]; then 1025 . /etc/security.local > $OUTPUT 2>&1 1026 if [ -s $OUTPUT ] ; then 1027 printf "\nRunning /etc/security.local:\n" 1028 cat $OUTPUT 1029 fi 1030fi 1031