security revision 1.105.4.2
1#!/bin/sh - 2# 3# $NetBSD: security,v 1.105.4.2 2007/11/23 15:51:28 dholland 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=${backup_dir:-/var/backups} 28pkgdb_dir=${pkgdb_dir:-/var/db/pkg} 29max_loginlen=${max_loginlen:-8} 30max_grouplen=${max_grouplen:-8} 31pkg_info=${pkg_info:-/usr/sbin/pkg_info} 32 33# Other configurable variables 34# 35special_files="/etc/mtree/special /etc/mtree/special.local" 36MP=/etc/master.passwd 37CHANGELIST="" 38work_dir=$backup_dir/work 39 40if [ ! -d "$work_dir" ]; then 41 mkdir -p "$work_dir" 42fi 43 44SECUREDIR=$(mktemp -d -t _securedir) || exit 1 45 46trap "/bin/rm -rf $SECUREDIR ; exit 0" EXIT INT QUIT PIPE 47 48if ! cd "$SECUREDIR"; then 49 echo "Can not cd to $SECUREDIR". 50 exit 1 51fi 52 53ERR=err.$$ 54TMP1=tmp1.$$ 55TMP2=tmp2.$$ 56MPBYUID=mpbyuid.$$ 57MPBYPATH=mpbypath.$$ 58LIST=list.$$ 59OUTPUT=output.$$ 60LABELS=labels.$$ 61PKGS=pkgs.$$ 62CHANGEFILES=changefiles.$$ 63SPECIALSPEC=specialspec.$$ 64 65 66# migrate_file old new 67# Determine if the "${old}" path name needs to be migrated to the 68# "${new}" path. Also checks if "${old}.current" needs migrating, 69# and if so, migrate it and possibly "${old}.current,v" and 70# "${old}.backup". 71# 72migrate_file() 73{ 74 _old=$1 75 _new=$2 76 if [ -z "$_old" -o -z "$_new" ]; then 77 err 3 "USAGE: migrate_file old new" 78 fi 79 if [ ! -d "${_new%/*}" ]; then 80 mkdir -p "${_new%/*}" 81 fi 82 if [ -f "${_old}" -a ! -f "${_new}" ]; then 83 echo "==> migrating ${_old}" 84 echo " to ${_new}" 85 mv "${_old}" "${_new}" 86 fi 87 if [ -f "${_old}.current" -a ! -f "${_new}.current" ]; then 88 echo "==> migrating ${_old}.current" 89 echo " to ${_new}.current" 90 mv "${_old}.current" "${_new}.current" 91 if [ -f "${_old}.current,v" -a ! -f "${_new}.current,v" ]; then 92 echo "==> migrating ${_old}.current,v" 93 echo " to ${_new}.current,v" 94 mv "${_old}.current,v" "${_new}.current,v" 95 fi 96 if [ -f "${_old}.backup" -a ! -f "${_new}.backup" ]; then 97 echo "==> migrating ${_old}.backup" 98 echo " to ${_new}.backup" 99 mv "${_old}.backup" "${_new}.backup" 100 fi 101 fi 102} 103 104 105# backup_and_diff file printdiff 106# Determine if file needs backing up, and if so, do it. 107# If printdiff is yes, display the diffs, otherwise 108# just print a message saying "[changes omitted]". 109# 110backup_and_diff() 111{ 112 _file=$1 113 _printdiff=$2 114 if [ -z "$_file" -o -z "$_printdiff" ]; then 115 err 3 "USAGE: backup_and_diff file printdiff" 116 fi 117 ! checkyesno _printdiff 118 _printdiff=$? 119 120 _old=$backup_dir/${_file##*/} 121 case "$_file" in 122 $work_dir/*) 123 _new=$_file 124 migrate_file "$backup_dir/$_old" "$_new" 125 migrate_file "$_old" "$_new" 126 ;; 127 *) 128 _new=$backup_dir/$_file 129 migrate_file "$_old" "$_new" 130 ;; 131 esac 132 CUR=${_new}.current 133 BACK=${_new}.backup 134 if [ -f $_file ]; then 135 if [ -f $CUR ] ; then 136 if [ "$_printdiff" -ne 0 ]; then 137 diff ${diff_options} $CUR $_file > $OUTPUT 138 else 139 if ! cmp -s $CUR $_file; then 140 echo "[changes omitted]" 141 fi > $OUTPUT 142 fi 143 if [ -s $OUTPUT ] ; then 144 printf \ 145 "\n======\n%s diffs (OLD < > NEW)\n======\n" $_file 146 cat $OUTPUT 147 backup_file update $_file $CUR $BACK 148 fi 149 else 150 printf "\n======\n%s added\n======\n" $_file 151 if [ "$_printdiff" -ne 0 ]; then 152 diff ${diff_options} /dev/null $_file 153 else 154 echo "[changes omitted]" 155 fi 156 backup_file add $_file $CUR $BACK 157 fi 158 else 159 if [ -f $CUR ]; then 160 printf "\n======\n%s removed\n======\n" $_file 161 if [ "$_printdiff" -ne 0 ]; then 162 diff ${diff_options} $CUR /dev/null 163 else 164 echo "[changes omitted]" 165 fi 166 backup_file remove $_file $CUR $BACK 167 fi 168 fi 169} 170 171 172# These are used several times. 173# 174awk -F: '!/^\+/ { print $1 " " $3 }' $MP | sort -k2n > $MPBYUID 175awk -F: '{ print $1 " " $9 }' $MP | sort -k2 > $MPBYPATH 176for file in $special_files; do 177 [ -s $file ] && cat $file 178done | mtree -CM -k all > $SPECIALSPEC || exit 1 179 180 181# Check the master password file syntax. 182# 183if checkyesno check_passwd; then 184 # XXX: the sense of permit_star is reversed; the code works as 185 # implemented, but usage needs to be negated. 186 checkyesno check_passwd_permit_star && permit_star=0 || permit_star=1 187 checkyesno check_passwd_permit_nonalpha \ 188 && permit_nonalpha=1 || permit_nonalpha=0 189 190 awk -v "len=$max_loginlen" \ 191 -v "nowarn_shells_list=$check_passwd_nowarn_shells" \ 192 -v "nowarn_users_list=$check_passwd_nowarn_users" \ 193 -v "permit_star=$permit_star" \ 194 -v "permit_nonalpha=$permit_nonalpha" \ 195 ' 196 BEGIN { 197 while ( getline < "/etc/shells" > 0 ) { 198 if ($0 ~ /^\#/ || $0 ~ /^$/ ) 199 continue; 200 shells[$1]++; 201 } 202 split(nowarn_shells_list, a); 203 for (i in a) nowarn_shells[a[i]]++; 204 split(nowarn_users_list, a); 205 for (i in a) nowarn_users[a[i]]++; 206 uid0_users_list="root toor" 207 split(uid0_users_list, a); 208 for (i in a) uid0_users[a[i]]++; 209 FS=":"; 210 } 211 212 { 213 if ($0 ~ /^[ ]*$/) { 214 printf "Line %d is a blank line.\n", NR; 215 next; 216 } 217 218 # NIS compat entry? 219 compatline = $1 ~ "^[\\+-]"; 220 if (compatline) { 221 if ($1 == "+" && NF == 1) { 222 next; 223 } 224 sub("^.", "", $1); 225 } 226 if (NF != 10) 227 printf "Line %d has the wrong number of fields.\n", NR; 228 if (compatline) { 229 if ($3 == 0) 230 printf "Line %d includes entries with uid 0.\n", 231 NR; 232 if ($1 == "") 233 next; 234 } 235 if (!permit_nonalpha && 236 $1 !~ /^[_A-Za-z0-9]([-A-Za-z0-9_.]*[A-Za-z0-9])*$/) 237 printf "Login %s has non-alphanumeric characters.\n", 238 $1; 239 if (length($1) > len) 240 printf "Login %s has more than "len" characters.\n", 241 $1; 242 if ($2 == "" && !compatline && !nowarn_users[$1]) 243 printf "Login %s has no password.\n", $1; 244 if (!nowarn_shells[$10] && !nowarn_users[$1]) { 245 if (length($2) != 13 && 246 length($2) != 20 && 247 $2 !~ /^\$1/ && 248 $2 !~ /^\$2/ && 249 $2 !~ /^\$sha1/ && 250 $2 != "" && 251 (permit_star || $2 != "*") && 252 $2 !~ /^\*[A-z-]+$/ && 253 $1 != "toor") { 254 if ($10 == "" || shells[$10]) 255 printf "Login %s is off but still has "\ 256 "a valid shell (%s)\n", $1, $10; 257 } else if (compatline && $10 == "") { 258 # nothing 259 } else if (! shells[$10]) 260 printf "Login %s does not have a valid "\ 261 "shell (%s)\n", $1, $10; 262 } 263 if ($3 == 0 && !uid0_users[$1] && !nowarn_users[$1]) 264 printf "Login %s has a user id of 0.\n", $1; 265 if ($3 != "" && $3 < 0) 266 printf "Login %s has a negative user id.\n", $1; 267 if ($4 != "" && $4 < 0) 268 printf "Login %s has a negative group id.\n", $1; 269 }' < $MP > $OUTPUT 270 if [ -s $OUTPUT ] ; then 271 printf "\nChecking the $MP file:\n" 272 cat $OUTPUT 273 fi 274 275 awk -F: '{ print $1 }' $MP | sort | uniq -d > $OUTPUT 276 if [ -s $OUTPUT ] ; then 277 printf "\n$MP has duplicate user names.\n" 278 column $OUTPUT 279 fi 280 281# To not exclude 'toor', a standard duplicate root account, from the duplicate 282# account test, uncomment the line below (without egrep in it)and comment 283# out the line (with egrep in it) below it. 284# 285# < $MPBYUID uniq -d -f 1 | awk '{ print $2 }' > $TMP2 286 < $MPBYUID egrep -v '^toor ' | uniq -d -f 1 | awk '{ print $2 }' > $TMP2 287 if [ -s $TMP2 ] ; then 288 printf "\n$MP has duplicate user id's.\n" 289 while read uid; do 290 grep -w $uid $MPBYUID 291 done < $TMP2 | column 292 fi 293fi 294 295# Check the group file syntax. 296# 297if checkyesno check_group; then 298 GRP=/etc/group 299 awk -F: -v "len=$max_grouplen" '{ 300 if ($0 ~ /^[ ]*$/) { 301 printf "Line %d is a blank line.\n", NR; 302 next; 303 } 304 if (NF != 4 && ($1 != "+" || NF != 1)) 305 printf "Line %d has the wrong number of fields.\n", NR; 306 if ($1 == "+" ) { 307 next; 308 } 309 if ($1 !~ /^[_A-Za-z0-9]([-A-Za-z0-9_.]*[A-Za-z0-9])*$/) 310 printf "Group %s has non-alphanumeric characters.\n", 311 $1; 312 if (length($1) > len) 313 printf "Group %s has more than "len" characters.\n", $1; 314 if ($3 !~ /[0-9]*/) 315 printf "Login %s has a negative group id.\n", $1; 316 }' < $GRP > $OUTPUT 317 if [ -s $OUTPUT ] ; then 318 printf "\nChecking the $GRP file:\n" 319 cat $OUTPUT 320 fi 321 322 awk -F: '{ print $1 }' $GRP | sort | uniq -d > $OUTPUT 323 if [ -s $OUTPUT ] ; then 324 printf "\n$GRP has duplicate group names.\n" 325 column $OUTPUT 326 fi 327fi 328 329# Check for root paths, umask values in startup files. 330# The check for the root paths is problematical -- it's likely to fail 331# in other environments. Once the shells have been modified to warn 332# of '.' in the path, the path tests should go away. 333# 334if checkyesno check_rootdotfiles; then 335 rhome=~root 336 umaskset=no 337 list="/etc/csh.cshrc /etc/csh.login ${rhome}/.cshrc ${rhome}/.login" 338 for i in $list ; do 339 if [ -f $i ] ; then 340 if egrep '^[ \t]*umask[ \t]+[0-7]+' $i > /dev/null ; 341 then 342 umaskset=yes 343 fi 344 # Double check the umask value itself; ensure that 345 # both the group and other write bits are set. 346 # 347 egrep '^[ \t]*umask[ \t]+[0-7]+' $i | 348 awk '{ 349 if ($2 ~ /^.$/ || $2 ~! /[^2367].$/) { 350 print "\tRoot umask is group writable" 351 } 352 if ($2 ~ /[^2367]$/) { 353 print "\tRoot umask is other writable" 354 } 355 }' | sort -u 356 SAVE_PATH=$PATH 357 unset PATH 358 /bin/csh -f -s << end-of-csh > /dev/null 2>&1 359 source $i 360 /bin/ls -ldgT \$path > $TMP1 361end-of-csh 362 export PATH=$SAVE_PATH 363 awk '{ 364 if ($10 ~ /^\.$/) { 365 print "\tThe root path includes ."; 366 next; 367 } 368 } 369 $1 ~ /^d....w/ \ 370 { print "\tRoot path directory " $10 " is group writable." } \ 371 $1 ~ /^d.......w/ \ 372 { print "\tRoot path directory " $10 " is other writable." }' \ 373 < $TMP1 374 fi 375 done > $OUTPUT 376 if [ $umaskset = "no" -o -s $OUTPUT ] ; then 377 printf "\nChecking root csh paths, umask values:\n$list\n\n" 378 if [ -s $OUTPUT ]; then 379 cat $OUTPUT 380 fi 381 if [ $umaskset = "no" ] ; then 382 printf "\tRoot csh startup files do not set the umask.\n" 383 fi 384 fi 385 386 umaskset=no 387 list="/etc/profile ${rhome}/.profile" 388 for i in $list; do 389 if [ -f $i ] ; then 390 if egrep umask $i > /dev/null ; then 391 umaskset=yes 392 fi 393 egrep umask $i | 394 awk '$2 ~ /^.$/ || $2 ~ /[^2367].$/ \ 395 { print "\tRoot umask is group writable" } \ 396 $2 ~ /[^2367]$/ \ 397 { print "\tRoot umask is other writable" }' 398 SAVE_PATH=$PATH 399 unset PATH 400 /bin/sh << end-of-sh > /dev/null 2>&1 401 . $i 402 list=\`echo \$PATH | /usr/bin/sed -e \ 403 's/^:/.:/;s/:$/:./;s/::/:.:/g;s/:/ /g'\` 404 /bin/ls -ldgT \$list > $TMP1 405end-of-sh 406 export PATH=$SAVE_PATH 407 awk '{ 408 if ($10 ~ /^\.$/) { 409 print "\tThe root path includes ."; 410 next; 411 } 412 } 413 $1 ~ /^d....w/ \ 414 { print "\tRoot path directory " $10 " is group writable." } \ 415 $1 ~ /^d.......w/ \ 416 { print "\tRoot path directory " $10 " is other writable." }' \ 417 < $TMP1 418 419 fi 420 done > $OUTPUT 421 if [ $umaskset = "no" -o -s $OUTPUT ] ; then 422 printf "\nChecking root sh paths, umask values:\n$list\n" 423 if [ -s $OUTPUT ]; then 424 cat $OUTPUT 425 fi 426 if [ $umaskset = "no" ] ; then 427 printf "\tRoot sh startup files do not set the umask.\n" 428 fi 429 fi 430fi 431 432# Root and uucp should both be in /etc/ftpusers. 433# 434if checkyesno check_ftpusers; then 435 list="uucp "`awk '$2 == 0 { print $1 }' $MPBYUID` 436 for i in $list; do 437 if /usr/libexec/ftpd -C $i ; then 438 printf "\t$i is not denied\n" 439 fi 440 done > $OUTPUT 441 if [ -s $OUTPUT ]; then 442 printf "\nChecking the /etc/ftpusers configuration:\n" 443 cat $OUTPUT 444 fi 445fi 446 447# Uudecode should not be in the /etc/mail/aliases file. 448# 449if checkyesno check_aliases; then 450 for f in /etc/mail/aliases /etc/aliases; do 451 if [ -f $f ] && egrep '^[^#]*(uudecode|decode).*\|' $f; then 452 printf "\nEntry for uudecode in $f file.\n" 453 fi 454 done 455fi 456 457# Files that should not have + signs. 458# 459if checkyesno check_rhosts; then 460 list="/etc/hosts.equiv /etc/hosts.lpd" 461 for f in $list ; do 462 if [ -f $f ] && egrep '\+' $f > /dev/null ; then 463 printf "\nPlus sign in $f file.\n" 464 fi 465 done 466 467 # Check for special users with .rhosts files. Only root and toor should 468 # have .rhosts files. Also, .rhosts files should not have plus signs. 469 awk -F: '$1 != "root" && $1 != "toor" && \ 470 ($3 < 100 || $1 == "ftp" || $1 == "uucp") \ 471 { print $1 " " $9 }' $MP | 472 sort -k2 | 473 while read uid homedir; do 474 if [ -f ${homedir}/.rhosts ] ; then 475 rhost=`ls -ldgT ${homedir}/.rhosts` 476 printf -- "$uid: $rhost\n" 477 fi 478 done > $OUTPUT 479 if [ -s $OUTPUT ] ; then 480 printf "\nChecking for special users with .rhosts files.\n" 481 cat $OUTPUT 482 fi 483 484 while read uid homedir; do 485 if [ -f ${homedir}/.rhosts -a -r ${homedir}/.rhosts ] && \ 486 cat -f ${homedir}/.rhosts | egrep '\+' > /dev/null ; then 487 printf -- "$uid: + in .rhosts file.\n" 488 fi 489 done < $MPBYPATH > $OUTPUT 490 if [ -s $OUTPUT ] ; then 491 printf "\nChecking .rhosts files syntax.\n" 492 cat $OUTPUT 493 fi 494fi 495 496# Check home directories. Directories should not be owned by someone else 497# or writable. 498# 499if checkyesno check_homes; then 500 checkyesno check_homes_permit_usergroups && \ 501 permit_usergroups=1 || permit_usergroups=0 502 while read uid homedir; do 503 if [ -d ${homedir}/ ] ; then 504 file=`ls -ldgT ${homedir}` 505 printf -- "$uid $file\n" 506 fi 507 done < $MPBYPATH | 508 awk -v "usergroups=$permit_usergroups" ' 509 $1 != $4 && $4 != "root" \ 510 { print "user " $1 " home directory is owned by " $4 } 511 $2 ~ /^d....w/ && (!usergroups || $5 != $1) \ 512 { print "user " $1 " home directory is group writable" } 513 $2 ~ /^d.......w/ \ 514 { print "user " $1 " home directory is other writable" }' \ 515 > $OUTPUT 516 if [ -s $OUTPUT ] ; then 517 printf "\nChecking home directories.\n" 518 cat $OUTPUT 519 fi 520 521 # Files that should not be owned by someone else or readable. 522 list=".Xauthority .netrc .ssh/id_dsa .ssh/id_rsa .ssh/identity" 523 while read uid homedir; do 524 for f in $list ; do 525 file=${homedir}/${f} 526 if [ -f $file ] ; then 527 printf -- "$uid $f `ls -ldgT $file`\n" 528 fi 529 done 530 done < $MPBYPATH | 531 awk -v "usergroups=$permit_usergroups" ' 532 $1 != $5 && $5 != "root" \ 533 { print "user " $1 " " $2 " file is owned by " $5 } 534 $3 ~ /^-...r/ && (!usergroups || $6 != $1) \ 535 { print "user " $1 " " $2 " file is group readable" } 536 $3 ~ /^-......r/ \ 537 { print "user " $1 " " $2 " file is other readable" } 538 $3 ~ /^-....w/ && (!usergroups || $6 != $1) \ 539 { print "user " $1 " " $2 " file is group writable" } 540 $3 ~ /^-.......w/ \ 541 { print "user " $1 " " $2 " file is other writable" }' \ 542 > $OUTPUT 543 544 # Files that should not be owned by someone else or writable. 545 list=".bash_history .bash_login .bash_logout .bash_profile .bashrc \ 546 .cshrc .emacs .exrc .forward .history .k5login .klogin .login \ 547 .logout .profile .qmail .rc_history .rhosts .shosts ssh .tcshrc \ 548 .twmrc .xinitrc .xsession .ssh/authorized_keys \ 549 .ssh/authorized_keys2 .ssh/config .ssh/id_dsa.pub \ 550 .ssh/id_rsa.pub .ssh/identity.pub .ssh/known_hosts \ 551 .ssh/known_hosts2" 552 while read uid homedir; do 553 for f in $list ; do 554 file=${homedir}/${f} 555 if [ -f $file ] ; then 556 printf -- "$uid $f `ls -ldgT $file`\n" 557 fi 558 done 559 done < $MPBYPATH | 560 awk -v "usergroups=$permit_usergroups" ' 561 $1 != $5 && $5 != "root" \ 562 { print "user " $1 " " $2 " file is owned by " $5 } 563 $3 ~ /^-....w/ && (!usergroups || $6 != $1) \ 564 { print "user " $1 " " $2 " file is group writable" } 565 $3 ~ /^-.......w/ \ 566 { print "user " $1 " " $2 " file is other writable" }' \ 567 >> $OUTPUT 568 if [ -s $OUTPUT ] ; then 569 printf "\nChecking dot files.\n" 570 cat $OUTPUT 571 fi 572fi 573 574# Mailboxes should be owned by user and unreadable. 575# 576if checkyesno check_varmail; then 577 ls -lA /var/mail | \ 578 awk ' NR == 1 { next; } 579 $9 ~ /^\./ {next; } 580 $3 != $9 { 581 print "user " $9 " mailbox is owned by " $3 582 } 583 $1 != "-rw-------" { 584 print "user " $9 " mailbox is " $1 ", group " $4 585 }' > $OUTPUT 586 if [ -s $OUTPUT ] ; then 587 printf "\nChecking mailbox ownership.\n" 588 cat $OUTPUT 589 fi 590fi 591 592# NFS exports shouldn't be globally exported 593# 594if checkyesno check_nfs && [ -f /etc/exports ]; then 595 awk '{ 596 # ignore comments and blank lines 597 if ($0 ~ /^\#/ || $0 ~ /^$/ ) 598 next; 599 # manage line continuation 600 while ($NF ~ /^\\$/) { 601 $NF = ""; 602 line = $0 ""; 603 getline; 604 $0 = line $0 ""; 605 } 606 607 delete dir; 608 readonly = ndir = 0; 609 for (i = 1; i <= NF; ++i) { 610 if ($i ~ /^\//) dir[ndir++] = $i; 611 else if ($i ~ /^-/) { 612 if ($i ~ /^-(ro|o)$/) readonly = 1; 613 if ($i ~ /^-network/) next; 614 } 615 else next; 616 } 617 if (readonly) 618 for (item in dir) 619 rodir[nrodir++] = dir[item]; 620 else 621 for (item in dir) 622 rwdir[nrwdir++] = dir[item]; 623 624 } 625 626 END { 627 if (nrodir) { 628 printf("Globally exported file system%s, read-only:\n", 629 nrodir > 1 ? "s" : ""); 630 for (item in rodir) 631 printf("\t%s\n", rodir[item]); 632 } 633 if (nrwdir) { 634 printf("Globally exported file system%s, read-write:\n", 635 nrwdir > 1 ? "s" : ""); 636 for (item in rwdir) 637 printf("\t%s\n", rwdir[item]); 638 } 639 }' < /etc/exports > $OUTPUT 640 if [ -s $OUTPUT ] ; then 641 printf "\nChecking for globally exported file systems.\n" 642 cat $OUTPUT 643 fi 644fi 645 646# Display any changes in setuid files and devices. 647# 648if checkyesno check_devices; then 649 > $ERR 650 ( 651 652 # Convert check_devices_ignore_fstypes="foo !bar bax" 653 # into "-fstype foo -o ! -fstype bar -o -fstype bax" 654 # and check_devices_ignore_paths="/foo !/bar /bax" 655 # into " -path /foo -o ! -path /bar -o -path /bax" 656 # 657 ignexpr=$(\ 658 echo $check_devices_ignore_fstypes | \ 659 sed -e's/\(!*\)\([^[:space:]]\{1,\}\)/-o \1 -fstype \2/g' ; \ 660 echo $check_devices_ignore_paths | \ 661 sed -e's/\(!*\)\([^[:space:]]\{1,\}\)/-o \1 -path \2/g' \ 662 ) 663 664 # Massage the expression into ( $ignexpr ) -a -prune -o 665 if [ -n "${ignexpr}" ]; then 666 ignexpr=$(\ 667 echo $ignexpr | \ 668 sed -e 's/^-o /( /' \ 669 -e 's/$/ ) -a -prune -o/' \ 670 ) 671 fi 672 673 find / $ignexpr \ 674 \( \( -perm -u+s -a ! -type d \) -o \ 675 \( -perm -g+s -a ! -type d \) -o \ 676 -type b -o -type c \) -print0 | \ 677 xargs -0 ls -ldgTq | sort +9 > $LIST 678 679 ) 2> $OUTPUT 680 681 # Display any errors that occurred during system file walk. 682 if [ -s $OUTPUT ] ; then 683 printf "Setuid/device find errors:\n" >> $ERR 684 cat $OUTPUT >> $ERR 685 printf "\n" >> $ERR 686 fi 687 688 # Display any changes in the setuid file list. 689 egrep -v '^[bc]' $LIST > $TMP1 690 if [ -s $TMP1 ] ; then 691 # Check to make sure uudecode isn't setuid. 692 if grep -w uudecode $TMP1 > /dev/null ; then 693 printf "\nUudecode is setuid.\n" >> $ERR 694 fi 695 696 file=$work_dir/setuid 697 migrate_file "$backup_dir/setuid" "$file" 698 CUR=${file}.current 699 BACK=${file}.backup 700 if [ -s $CUR ] ; then 701 if cmp -s $CUR $TMP1 ; then 702 : 703 else 704 > $TMP2 705 join -110 -210 -v2 $CUR $TMP1 > $OUTPUT 706 if [ -s $OUTPUT ] ; then 707 printf "Setuid additions:\n" >> $ERR 708 tee -a $TMP2 < $OUTPUT >> $ERR 709 printf "\n" >> $ERR 710 fi 711 712 join -110 -210 -v1 $CUR $TMP1 > $OUTPUT 713 if [ -s $OUTPUT ] ; then 714 printf "Setuid deletions:\n" >> $ERR 715 tee -a $TMP2 < $OUTPUT >> $ERR 716 printf "\n" >> $ERR 717 fi 718 719 sort -k10 $TMP2 $CUR $TMP1 | \ 720 sed -e 's/[ ][ ]*/ /g' | \ 721 uniq -u > $OUTPUT 722 if [ -s $OUTPUT ] ; then 723 printf "Setuid changes:\n" >> $ERR 724 column -t $OUTPUT >> $ERR 725 printf "\n" >> $ERR 726 fi 727 728 backup_file update $TMP1 $CUR $BACK 729 fi 730 else 731 printf "Setuid additions:\n" >> $ERR 732 column -t $TMP1 >> $ERR 733 printf "\n" >> $ERR 734 backup_file add $TMP1 $CUR $BACK 735 fi 736 fi 737 738 # Check for block and character disk devices that are readable or 739 # writable or not owned by root.operator. 740 >$TMP1 741 DISKLIST="ccd ch hk hp ld md ra raid rb rd rl rx \ 742 sd se ss uk up vnd wd xd xy" 743# DISKLIST="$DISKLIST ct mt st wt" 744 for i in $DISKLIST; do 745 egrep "^b.*/${i}[0-9][0-9]*[a-p]$" $LIST >> $TMP1 746 egrep "^c.*/r${i}[0-9][0-9]*[a-p]$" $LIST >> $TMP1 747 done 748 749 awk '$3 != "root" || $4 != "operator" || $1 !~ /.rw-r-----/ \ 750 { printf "Disk %s is user %s, group %s, permissions %s.\n", \ 751 $11, $3, $4, $1; }' < $TMP1 > $OUTPUT 752 if [ -s $OUTPUT ] ; then 753 printf "\nChecking disk ownership and permissions.\n" >> $ERR 754 cat $OUTPUT >> $ERR 755 printf "\n" >> $ERR 756 fi 757 758 # Display any changes in the device file list. 759 egrep '^[bc]' $LIST | sort -k11 > $TMP1 760 if [ -s $TMP1 ] ; then 761 file=$work_dir/device 762 migrate_file "$backup_dir/device" "$file" 763 CUR=${file}.current 764 BACK=${file}.backup 765 766 if [ -s $CUR ] ; then 767 if cmp -s $CUR $TMP1 ; then 768 : 769 else 770 > $TMP2 771 join -111 -211 -v2 $CUR $TMP1 > $OUTPUT 772 if [ -s $OUTPUT ] ; then 773 printf "Device additions:\n" >> $ERR 774 tee -a $TMP2 < $OUTPUT >> $ERR 775 printf "\n" >> $ERR 776 fi 777 778 join -111 -211 -v1 $CUR $TMP1 > $OUTPUT 779 if [ -s $OUTPUT ] ; then 780 printf "Device deletions:\n" >> $ERR 781 tee -a $TMP2 < $OUTPUT >> $ERR 782 printf "\n" >> $ERR 783 fi 784 785 # Report any block device change. Ignore 786 # character devices, only the name is 787 # significant. 788 cat $TMP2 $CUR $TMP1 | \ 789 sed -e '/^c/d' | \ 790 sort -k11 | \ 791 sed -e 's/[ ][ ]*/ /g' | \ 792 uniq -u > $OUTPUT 793 if [ -s $OUTPUT ] ; then 794 printf "Block device changes:\n" >> $ERR 795 column -t $OUTPUT >> $ERR 796 printf "\n" >> $ERR 797 fi 798 799 backup_file update $TMP1 $CUR $BACK 800 fi 801 else 802 printf "Device additions:\n" >> $ERR 803 column -t $TMP1 >> $ERR 804 printf "\n" >> $ERR 805 backup_file add $TMP1 $CUR $BACK >> $ERR 806 fi 807 fi 808 if [ -s $ERR ] ; then 809 printf "\nChecking setuid files and devices:\n" 810 cat $ERR 811 printf "\n" 812 fi 813fi 814 815# Check special files. 816# Check system binaries. 817# 818# Create the mtree tree specifications using: 819# mtree -cx -pDIR -kmd5,uid,gid,mode,nlink,size,link,time > DIR.secure 820# chown root:wheel DIR.secure 821# chmod u+r,go= DIR.secure 822# 823# Note, this is not complete protection against Trojan horsed binaries, as 824# the hacker can modify the tree specification to match the replaced binary. 825# For details on really protecting yourself against modified binaries, see 826# the mtree(8) manual page. 827# 828if checkyesno check_mtree; then 829 if checkyesno check_mtree_follow_symlinks; then 830 check_mtree_flags="-L" 831 else 832 check_mtree_flags="" 833 fi 834 mtree -e -l -p / $check_mtree_flags -f $SPECIALSPEC 3>&1 >$OUTPUT 2>&3 | 835 grep -v '^mtree: dev/tty: Device not configured$' >&2 836 if [ -s $OUTPUT ]; then 837 printf "\nChecking special files and directories.\n" 838 cat $OUTPUT 839 fi 840 841 for file in /etc/mtree/*.secure; do 842 [ $file = '/etc/mtree/*.secure' ] && continue 843 tree=`sed -n -e '3s/.* //p' -e 3q $file` 844 mtree $check_mtree_flags -f $file -p $tree > $TMP1 845 if [ -s $TMP1 ]; then 846 printf "\nChecking $tree:\n" 847 cat $TMP1 848 fi 849 done > $OUTPUT 850 if [ -s $OUTPUT ]; then 851 printf "\nChecking system binaries:\n" 852 cat $OUTPUT 853 fi 854fi 855 856# Backup disklabels of available disks 857# 858if checkyesno check_disklabels; then 859 # migrate old disklabels 860 for file in `ls -1d $backup_dir/$backup_dir/disklabel.* \ 861 $backup_dir/disklabel.* 2>/dev/null`; do 862 migrate_file "$file" "$work_dir/${file##*/}" 863 done 864 865 # generate list of old disklabels, fdisks & wedges and remove them 866 ls -1d $work_dir/disklabel.* $work_dir/fdisk.* $work_dir/wedges.* 2>/dev/null | 867 egrep -v '\.(backup|current)(,v)?$' > $LABELS 868 xargs rm < $LABELS 869 870 # generate disklabels of all disks excluding: cd dk fd md st 871 disks=`iostat -x | awk 'NR > 1 && $1 !~ /^[cfm]d|dk|st|nfs/ { print $1; }'` 872 for i in $disks; do 873 disklabel $i > "$work_dir/disklabel.$i" 2>/dev/null 874 done 875 876 # if fdisk is available, generate fdisks for: ed ld sd wd 877 if [ -x /sbin/fdisk ]; then 878 disks=`iostat -x| awk 'NR > 1 && $1 ~ /^[elsw]d/ { print $1; }'` 879 for i in $disks; do 880 /sbin/fdisk $i > "$work_dir/fdisk.$i" 2>/dev/null 881 done 882 fi 883 884 # if dkctl is available, generate dkctl listwedges for: ed ld sd wd cgd ofdisk ra rl raid 885 if [ -x /sbin/dkctl ]; then 886 disks=`iostat -x| awk 'NR > 1 && $1 ~ /^[elsw]d|cgd|ofdisk|r[al]|raid/ { print $1; }'` 887 for i in $disks; do 888 /sbin/dkctl $i listwedges > "$work_dir/wedges.$i" 2>/dev/null 889 done 890 fi 891 892 # append list of new disklabels, fdisks and wedges 893 ls -1d $work_dir/disklabel.* $work_dir/fdisk.* $work_dir/wedges.* 2>/dev/null | 894 egrep -v '\.(backup|current)(,v)?$' >> $LABELS 895 CHANGELIST="$LABELS $CHANGELIST" 896fi 897 898# Check for changes in the list of installed pkgs 899# 900if checkyesno check_pkgs && [ -d $pkgdb_dir ]; then 901 pkgs=$work_dir/pkgs 902 migrate_file "$backup_dir/pkgs" "$pkgs" 903 ( cd $pkgdb_dir 904 $pkg_info | sort 905 echo "" 906 find . \( -name +REQUIRED_BY -o -name +CONTENTS \) -print0 | 907 xargs -0 ls -ldgTq | sort -t. +1 | sed -e 's, \./, ,' 908 ) > $pkgs 909 echo "$pkgs" > $PKGS 910 CHANGELIST="$PKGS $CHANGELIST" 911fi 912 913# List of files that get backed up and checked for any modifications. 914# Any changes cause the files to rotate. 915# 916if checkyesno check_changelist ; then 917 mtree -D -k type -f $SPECIALSPEC -E exclude | 918 sed '/^type=file/!d ; s/type=file \.//' | unvis > $CHANGEFILES 919 920 ( 921 # Add other files which might dynamically exist: 922 # /etc/ifconfig.* 923 # /etc/raid*.conf 924 # /etc/rc.d/* 925 # /etc/rc.conf.d/* 926 # 927 echo "/etc/ifconfig.*" 928 echo "/etc/raid*.conf" 929 echo "/etc/rc.d/*" 930 echo "/etc/rc.conf.d/*" 931 932 # Add /etc/changelist 933 # 934 if [ -s /etc/changelist ]; then 935 grep -v '^#' /etc/changelist 936 fi 937 ) | while read file; do 938 case "$file" in 939 *[\*\?\[]*) # If changelist line is a glob ... 940 # ... expand possible backup files 941 # 942 ls -1d $(echo $backup_dir/${file}.current) 2>/dev/null \ 943 | sed "s,^$backup_dir/,, ; s,\.current$,," 944 945 # ... expand possible files 946 # 947 ls -1d $(echo $file) 2>/dev/null 948 ;; 949 *) 950 # Otherwise, just print the filename 951 echo $file 952 ;; 953 esac 954 done >> $CHANGEFILES 955 CHANGELIST="$CHANGEFILES $CHANGELIST" 956fi 957 958# Special case backups, including the master password file and 959# ssh private host keys. The normal backup mechanisms for 960# $check_changelist (see below) also print out the actual file 961# differences and we don't want to do that for these files 962# 963echo $MP > $TMP1 # always add /etc/master.passwd 964mtree -D -k type -f $SPECIALSPEC -I nodiff | 965 sed '/^type=file/!d ; s/type=file \.//' | unvis >> $TMP1 966grep -v '^$' $TMP1 | sort -u > $TMP2 967 968while read file; do 969 backup_and_diff "$file" no 970done < $TMP2 971 972 973if [ -n "$CHANGELIST" ]; then 974 grep -h -v '^$' $CHANGELIST | sort -u > $TMP1 975 comm -23 $TMP1 $TMP2 | while read file; do 976 backup_and_diff "$file" yes 977 done 978fi 979 980if [ -f /etc/security.local ]; then 981 . /etc/security.local > $OUTPUT 2>&1 982 if [ -s $OUTPUT ] ; then 983 printf "\nRunning /etc/security.local:\n" 984 cat $OUTPUT 985 fi 986fi 987