security revision 1.94.2.6
1#!/bin/sh - 2# 3# $NetBSD: security,v 1.94.2.6 2007/09/17 20:05:07 bouyer 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 if (NF != 10 && ($1 != "+" || NF != 1)) 218 printf "Line %d has the wrong number of fields.\n", NR; 219 if ($1 == "+" ) { 220 if (NF != 1 && $3 == 0) 221 printf "Line %d includes entries with uid 0.\n", 222 NR; 223 next; 224 } 225 if (!permit_nonalpha && 226 $1 !~ /^[_A-Za-z0-9]([-A-Za-z0-9_.]*[A-Za-z0-9])*$/) 227 printf "Login %s has non-alphanumeric characters.\n", 228 $1; 229 if (length($1) > len) 230 printf "Login %s has more than "len" characters.\n", 231 $1; 232 if ($2 == "" && !nowarn_users[$1]) 233 printf "Login %s has no password.\n", $1; 234 if (!nowarn_shells[$10] && !nowarn_users[$1]) { 235 if (length($2) != 13 && 236 length($2) != 20 && 237 $2 !~ /^\$1/ && 238 $2 !~ /^\$2/ && 239 $2 != "" && 240 (permit_star || $2 != "*") && 241 $2 !~ /^\*[A-z-]+$/ && 242 $1 != "toor") { 243 if ($10 == "" || shells[$10]) 244 printf "Login %s is off but still has "\ 245 "a valid shell (%s)\n", $1, $10; 246 } else if (! shells[$10]) 247 printf "Login %s does not have a valid "\ 248 "shell (%s)\n", $1, $10; 249 } 250 if ($3 == 0 && !uid0_users[$1] && !nowarn_users[$1]) 251 printf "Login %s has a user id of 0.\n", $1; 252 if ($3 < 0) 253 printf "Login %s has a negative user id.\n", $1; 254 if ($4 < 0) 255 printf "Login %s has a negative group id.\n", $1; 256 }' < $MP > $OUTPUT 257 if [ -s $OUTPUT ] ; then 258 printf "\nChecking the $MP file:\n" 259 cat $OUTPUT 260 fi 261 262 awk -F: '{ print $1 }' $MP | sort | uniq -d > $OUTPUT 263 if [ -s $OUTPUT ] ; then 264 printf "\n$MP has duplicate user names.\n" 265 column $OUTPUT 266 fi 267 268# To not exclude 'toor', a standard duplicate root account, from the duplicate 269# account test, uncomment the line below (without egrep in it)and comment 270# out the line (with egrep in it) below it. 271# 272# < $MPBYUID uniq -d -f 1 | awk '{ print $2 }' > $TMP2 273 < $MPBYUID egrep -v '^toor ' | uniq -d -f 1 | awk '{ print $2 }' > $TMP2 274 if [ -s $TMP2 ] ; then 275 printf "\n$MP has duplicate user id's.\n" 276 while read uid; do 277 grep -w $uid $MPBYUID 278 done < $TMP2 | column 279 fi 280fi 281 282# Check the group file syntax. 283# 284if checkyesno check_group; then 285 GRP=/etc/group 286 awk -F: -v "len=$max_grouplen" '{ 287 if ($0 ~ /^[ ]*$/) { 288 printf "Line %d is a blank line.\n", NR; 289 next; 290 } 291 if (NF != 4 && ($1 != "+" || NF != 1)) 292 printf "Line %d has the wrong number of fields.\n", NR; 293 if ($1 == "+" ) { 294 next; 295 } 296 if ($1 !~ /^[_A-Za-z0-9]([-A-Za-z0-9_.]*[A-Za-z0-9])*$/) 297 printf "Group %s has non-alphanumeric characters.\n", 298 $1; 299 if (length($1) > len) 300 printf "Group %s has more than "len" characters.\n", $1; 301 if ($3 !~ /[0-9]*/) 302 printf "Login %s has a negative group id.\n", $1; 303 }' < $GRP > $OUTPUT 304 if [ -s $OUTPUT ] ; then 305 printf "\nChecking the $GRP file:\n" 306 cat $OUTPUT 307 fi 308 309 awk -F: '{ print $1 }' $GRP | sort | uniq -d > $OUTPUT 310 if [ -s $OUTPUT ] ; then 311 printf "\n$GRP has duplicate group names.\n" 312 column $OUTPUT 313 fi 314fi 315 316# Check for root paths, umask values in startup files. 317# The check for the root paths is problematical -- it's likely to fail 318# in other environments. Once the shells have been modified to warn 319# of '.' in the path, the path tests should go away. 320# 321if checkyesno check_rootdotfiles; then 322 rhome=~root 323 umaskset=no 324 list="/etc/csh.cshrc /etc/csh.login ${rhome}/.cshrc ${rhome}/.login" 325 for i in $list ; do 326 if [ -f $i ] ; then 327 if egrep '^[ \t]*umask[ \t]+[0-7]+' $i > /dev/null ; 328 then 329 umaskset=yes 330 fi 331 # Double check the umask value itself; ensure that 332 # both the group and other write bits are set. 333 # 334 egrep '^[ \t]*umask[ \t]+[0-7]+' $i | 335 awk '{ 336 if ($2 ~ /^.$/ || $2 ~! /[^2367].$/) { 337 print "\tRoot umask is group writable" 338 } 339 if ($2 ~ /[^2367]$/) { 340 print "\tRoot umask is other writable" 341 } 342 }' | sort -u 343 SAVE_PATH=$PATH 344 unset PATH 345 /bin/csh -f -s << end-of-csh > /dev/null 2>&1 346 source $i 347 /bin/ls -ldgT \$path > $TMP1 348end-of-csh 349 export PATH=$SAVE_PATH 350 awk '{ 351 if ($10 ~ /^\.$/) { 352 print "\tThe root path includes ."; 353 next; 354 } 355 } 356 $1 ~ /^d....w/ \ 357 { print "\tRoot path directory " $10 " is group writable." } \ 358 $1 ~ /^d.......w/ \ 359 { print "\tRoot path directory " $10 " is other writable." }' \ 360 < $TMP1 361 fi 362 done > $OUTPUT 363 if [ $umaskset = "no" -o -s $OUTPUT ] ; then 364 printf "\nChecking root csh paths, umask values:\n$list\n\n" 365 if [ -s $OUTPUT ]; then 366 cat $OUTPUT 367 fi 368 if [ $umaskset = "no" ] ; then 369 printf "\tRoot csh startup files do not set the umask.\n" 370 fi 371 fi 372 373 umaskset=no 374 list="/etc/profile ${rhome}/.profile" 375 for i in $list; do 376 if [ -f $i ] ; then 377 if egrep umask $i > /dev/null ; then 378 umaskset=yes 379 fi 380 egrep umask $i | 381 awk '$2 ~ /^.$/ || $2 ~ /[^2367].$/ \ 382 { print "\tRoot umask is group writable" } \ 383 $2 ~ /[^2367]$/ \ 384 { print "\tRoot umask is other writable" }' 385 SAVE_PATH=$PATH 386 unset PATH 387 /bin/sh << end-of-sh > /dev/null 2>&1 388 . $i 389 list=\`echo \$PATH | /usr/bin/sed -e \ 390 's/^:/.:/;s/:$/:./;s/::/:.:/g;s/:/ /g'\` 391 /bin/ls -ldgT \$list > $TMP1 392end-of-sh 393 export PATH=$SAVE_PATH 394 awk '{ 395 if ($10 ~ /^\.$/) { 396 print "\tThe root path includes ."; 397 next; 398 } 399 } 400 $1 ~ /^d....w/ \ 401 { print "\tRoot path directory " $10 " is group writable." } \ 402 $1 ~ /^d.......w/ \ 403 { print "\tRoot path directory " $10 " is other writable." }' \ 404 < $TMP1 405 406 fi 407 done > $OUTPUT 408 if [ $umaskset = "no" -o -s $OUTPUT ] ; then 409 printf "\nChecking root sh paths, umask values:\n$list\n" 410 if [ -s $OUTPUT ]; then 411 cat $OUTPUT 412 fi 413 if [ $umaskset = "no" ] ; then 414 printf "\tRoot sh startup files do not set the umask.\n" 415 fi 416 fi 417fi 418 419# Root and uucp should both be in /etc/ftpusers. 420# 421if checkyesno check_ftpusers; then 422 list="uucp "`awk '$2 == 0 { print $1 }' $MPBYUID` 423 for i in $list; do 424 if /usr/libexec/ftpd -C $i ; then 425 printf "\t$i is not denied\n" 426 fi 427 done > $OUTPUT 428 if [ -s $OUTPUT ]; then 429 printf "\nChecking the /etc/ftpusers configuration:\n" 430 cat $OUTPUT 431 fi 432fi 433 434# Uudecode should not be in the /etc/mail/aliases file. 435# 436if checkyesno check_aliases; then 437 for f in /etc/mail/aliases /etc/aliases; do 438 if [ -f $f ] && egrep '^[^#]*(uudecode|decode).*\|' $f; then 439 printf "\nEntry for uudecode in $f file.\n" 440 fi 441 done 442fi 443 444# Files that should not have + signs. 445# 446if checkyesno check_rhosts; then 447 list="/etc/hosts.equiv /etc/hosts.lpd" 448 for f in $list ; do 449 if [ -f $f ] && egrep '\+' $f > /dev/null ; then 450 printf "\nPlus sign in $f file.\n" 451 fi 452 done 453 454 # Check for special users with .rhosts files. Only root and toor should 455 # have .rhosts files. Also, .rhosts files should not have plus signs. 456 awk -F: '$1 != "root" && $1 != "toor" && \ 457 ($3 < 100 || $1 == "ftp" || $1 == "uucp") \ 458 { print $1 " " $9 }' $MP | 459 sort -k2 | 460 while read uid homedir; do 461 if [ -f ${homedir}/.rhosts ] ; then 462 rhost=`ls -ldgT ${homedir}/.rhosts` 463 printf -- "$uid: $rhost\n" 464 fi 465 done > $OUTPUT 466 if [ -s $OUTPUT ] ; then 467 printf "\nChecking for special users with .rhosts files.\n" 468 cat $OUTPUT 469 fi 470 471 while read uid homedir; do 472 if [ -f ${homedir}/.rhosts -a -r ${homedir}/.rhosts ] && \ 473 cat -f ${homedir}/.rhosts | egrep '\+' > /dev/null ; then 474 printf -- "$uid: + in .rhosts file.\n" 475 fi 476 done < $MPBYPATH > $OUTPUT 477 if [ -s $OUTPUT ] ; then 478 printf "\nChecking .rhosts files syntax.\n" 479 cat $OUTPUT 480 fi 481fi 482 483# Check home directories. Directories should not be owned by someone else 484# or writable. 485# 486if checkyesno check_homes; then 487 checkyesno check_homes_permit_usergroups && \ 488 permit_usergroups=1 || permit_usergroups=0 489 while read uid homedir; do 490 if [ -d ${homedir}/ ] ; then 491 file=`ls -ldgT ${homedir}` 492 printf -- "$uid $file\n" 493 fi 494 done < $MPBYPATH | 495 awk -v "usergroups=$permit_usergroups" ' 496 $1 != $4 && $4 != "root" \ 497 { print "user " $1 " home directory is owned by " $4 } 498 $2 ~ /^d....w/ && (!usergroups || $5 != $1) \ 499 { print "user " $1 " home directory is group writable" } 500 $2 ~ /^d.......w/ \ 501 { print "user " $1 " home directory is other writable" }' \ 502 > $OUTPUT 503 if [ -s $OUTPUT ] ; then 504 printf "\nChecking home directories.\n" 505 cat $OUTPUT 506 fi 507 508 # Files that should not be owned by someone else or readable. 509 list=".Xauthority .netrc .ssh/id_dsa .ssh/id_rsa .ssh/identity" 510 while read uid homedir; do 511 for f in $list ; do 512 file=${homedir}/${f} 513 if [ -f $file ] ; then 514 printf -- "$uid $f `ls -ldgT $file`\n" 515 fi 516 done 517 done < $MPBYPATH | 518 awk -v "usergroups=$permit_usergroups" ' 519 $1 != $5 && $5 != "root" \ 520 { print "user " $1 " " $2 " file is owned by " $5 } 521 $3 ~ /^-...r/ && (!usergroups || $6 != $1) \ 522 { print "user " $1 " " $2 " file is group readable" } 523 $3 ~ /^-......r/ \ 524 { print "user " $1 " " $2 " file is other readable" } 525 $3 ~ /^-....w/ && (!usergroups || $6 != $1) \ 526 { print "user " $1 " " $2 " file is group writable" } 527 $3 ~ /^-.......w/ \ 528 { print "user " $1 " " $2 " file is other writable" }' \ 529 > $OUTPUT 530 531 # Files that should not be owned by someone else or writable. 532 list=".bash_history .bash_login .bash_logout .bash_profile .bashrc \ 533 .cshrc .emacs .exrc .forward .history .k5login .klogin .login \ 534 .logout .profile .qmail .rc_history .rhosts .shosts ssh .tcshrc \ 535 .twmrc .xinitrc .xsession .ssh/authorized_keys \ 536 .ssh/authorized_keys2 .ssh/config .ssh/id_dsa.pub \ 537 .ssh/id_rsa.pub .ssh/identity.pub .ssh/known_hosts \ 538 .ssh/known_hosts2" 539 while read uid homedir; do 540 for f in $list ; do 541 file=${homedir}/${f} 542 if [ -f $file ] ; then 543 printf -- "$uid $f `ls -ldgT $file`\n" 544 fi 545 done 546 done < $MPBYPATH | 547 awk -v "usergroups=$permit_usergroups" ' 548 $1 != $5 && $5 != "root" \ 549 { print "user " $1 " " $2 " file is owned by " $5 } 550 $3 ~ /^-....w/ && (!usergroups || $6 != $1) \ 551 { print "user " $1 " " $2 " file is group writable" } 552 $3 ~ /^-.......w/ \ 553 { print "user " $1 " " $2 " file is other writable" }' \ 554 >> $OUTPUT 555 if [ -s $OUTPUT ] ; then 556 printf "\nChecking dot files.\n" 557 cat $OUTPUT 558 fi 559fi 560 561# Mailboxes should be owned by user and unreadable. 562# 563if checkyesno check_varmail; then 564 ls -lA /var/mail | \ 565 awk ' NR == 1 { next; } 566 $9 ~ /^\./ {next; } 567 $3 != $9 { 568 print "user " $9 " mailbox is owned by " $3 569 } 570 $1 != "-rw-------" { 571 print "user " $9 " mailbox is " $1 ", group " $4 572 }' > $OUTPUT 573 if [ -s $OUTPUT ] ; then 574 printf "\nChecking mailbox ownership.\n" 575 cat $OUTPUT 576 fi 577fi 578 579# NFS exports shouldn't be globally exported 580# 581if checkyesno check_nfs && [ -f /etc/exports ]; then 582 awk '{ 583 # ignore comments and blank lines 584 if ($0 ~ /^\#/ || $0 ~ /^$/ ) 585 next; 586 # manage line continuation 587 while ($NF ~ /^\\$/) { 588 $NF = ""; 589 line = $0 ""; 590 getline; 591 $0 = line $0 ""; 592 } 593 594 delete dir; 595 readonly = ndir = 0; 596 for (i = 1; i <= NF; ++i) { 597 if ($i ~ /^\//) dir[ndir++] = $i; 598 else if ($i ~ /^-/) { 599 if ($i ~ /^-(ro|o)$/) readonly = 1; 600 if ($i ~ /^-network/) next; 601 } 602 else next; 603 } 604 if (readonly) 605 for (item in dir) 606 rodir[nrodir++] = dir[item]; 607 else 608 for (item in dir) 609 rwdir[nrwdir++] = dir[item]; 610 611 } 612 613 END { 614 if (nrodir) { 615 printf("Globally exported file system%s, read-only:\n", 616 nrodir > 1 ? "s" : ""); 617 for (item in rodir) 618 printf("\t%s\n", rodir[item]); 619 } 620 if (nrwdir) { 621 printf("Globally exported file system%s, read-write:\n", 622 nrwdir > 1 ? "s" : ""); 623 for (item in rwdir) 624 printf("\t%s\n", rwdir[item]); 625 } 626 }' < /etc/exports > $OUTPUT 627 if [ -s $OUTPUT ] ; then 628 printf "\nChecking for globally exported file systems.\n" 629 cat $OUTPUT 630 fi 631fi 632 633# Display any changes in setuid files and devices. 634# 635if checkyesno check_devices; then 636 > $ERR 637 ( 638 639 # Convert check_devices_ignore_fstypes="foo !bar bax" 640 # into "-fstype foo -o ! -fstype bar -o -fstype bax" 641 # and check_devices_ignore_paths="/foo !/bar /bax" 642 # into " -path /foo -o ! -path /bar -o -path /bax" 643 # 644 ignexpr=$(\ 645 echo $check_devices_ignore_fstypes | \ 646 sed -e's/\(!*\)\([^[:space:]]\{1,\}\)/-o \1 -fstype \2/g' ; \ 647 echo $check_devices_ignore_paths | \ 648 sed -e's/\(!*\)\([^[:space:]]\{1,\}\)/-o \1 -path \2/g' \ 649 ) 650 651 # Massage the expression into ( $ignexpr ) -a -prune -o 652 if [ -n "${ignexpr}" ]; then 653 ignexpr=$(\ 654 echo $ignexpr | \ 655 sed -e 's/^-o /( /' \ 656 -e 's/$/ ) -a -prune -o/' \ 657 ) 658 fi 659 660 find / $ignexpr \ 661 \( \( -perm -u+s -a ! -type d \) -o \ 662 \( -perm -g+s -a ! -type d \) -o \ 663 -type b -o -type c \) -print0 | \ 664 xargs -0 ls -ldgTq | sort +9 > $LIST 665 666 ) 2> $OUTPUT 667 668 # Display any errors that occurred during system file walk. 669 if [ -s $OUTPUT ] ; then 670 printf "Setuid/device find errors:\n" >> $ERR 671 cat $OUTPUT >> $ERR 672 printf "\n" >> $ERR 673 fi 674 675 # Display any changes in the setuid file list. 676 egrep -v '^[bc]' $LIST > $TMP1 677 if [ -s $TMP1 ] ; then 678 # Check to make sure uudecode isn't setuid. 679 if grep -w uudecode $TMP1 > /dev/null ; then 680 printf "\nUudecode is setuid.\n" >> $ERR 681 fi 682 683 file=$work_dir/setuid 684 migrate_file "$backup_dir/setuid" "$file" 685 CUR=${file}.current 686 BACK=${file}.backup 687 if [ -s $CUR ] ; then 688 if cmp -s $CUR $TMP1 ; then 689 : 690 else 691 > $TMP2 692 join -110 -210 -v2 $CUR $TMP1 > $OUTPUT 693 if [ -s $OUTPUT ] ; then 694 printf "Setuid additions:\n" >> $ERR 695 tee -a $TMP2 < $OUTPUT >> $ERR 696 printf "\n" >> $ERR 697 fi 698 699 join -110 -210 -v1 $CUR $TMP1 > $OUTPUT 700 if [ -s $OUTPUT ] ; then 701 printf "Setuid deletions:\n" >> $ERR 702 tee -a $TMP2 < $OUTPUT >> $ERR 703 printf "\n" >> $ERR 704 fi 705 706 sort -k10 $TMP2 $CUR $TMP1 | \ 707 sed -e 's/[ ][ ]*/ /g' | \ 708 uniq -u > $OUTPUT 709 if [ -s $OUTPUT ] ; then 710 printf "Setuid changes:\n" >> $ERR 711 column -t $OUTPUT >> $ERR 712 printf "\n" >> $ERR 713 fi 714 715 backup_file update $TMP1 $CUR $BACK 716 fi 717 else 718 printf "Setuid additions:\n" >> $ERR 719 column -t $TMP1 >> $ERR 720 printf "\n" >> $ERR 721 backup_file add $TMP1 $CUR $BACK 722 fi 723 fi 724 725 # Check for block and character disk devices that are readable or 726 # writable or not owned by root.operator. 727 >$TMP1 728 DISKLIST="ccd ch hk hp ld md ra raid rb rd rl rx \ 729 sd se ss uk up vnd wd xd xy" 730# DISKLIST="$DISKLIST ct mt st wt" 731 for i in $DISKLIST; do 732 egrep "^b.*/${i}[0-9][0-9]*[a-p]$" $LIST >> $TMP1 733 egrep "^c.*/r${i}[0-9][0-9]*[a-p]$" $LIST >> $TMP1 734 done 735 736 awk '$3 != "root" || $4 != "operator" || $1 !~ /.rw-r-----/ \ 737 { printf "Disk %s is user %s, group %s, permissions %s.\n", \ 738 $11, $3, $4, $1; }' < $TMP1 > $OUTPUT 739 if [ -s $OUTPUT ] ; then 740 printf "\nChecking disk ownership and permissions.\n" >> $ERR 741 cat $OUTPUT >> $ERR 742 printf "\n" >> $ERR 743 fi 744 745 # Display any changes in the device file list. 746 egrep '^[bc]' $LIST | sort -k11 > $TMP1 747 if [ -s $TMP1 ] ; then 748 file=$work_dir/device 749 migrate_file "$backup_dir/device" "$file" 750 CUR=${file}.current 751 BACK=${file}.backup 752 753 if [ -s $CUR ] ; then 754 if cmp -s $CUR $TMP1 ; then 755 : 756 else 757 > $TMP2 758 join -111 -211 -v2 $CUR $TMP1 > $OUTPUT 759 if [ -s $OUTPUT ] ; then 760 printf "Device additions:\n" >> $ERR 761 tee -a $TMP2 < $OUTPUT >> $ERR 762 printf "\n" >> $ERR 763 fi 764 765 join -111 -211 -v1 $CUR $TMP1 > $OUTPUT 766 if [ -s $OUTPUT ] ; then 767 printf "Device deletions:\n" >> $ERR 768 tee -a $TMP2 < $OUTPUT >> $ERR 769 printf "\n" >> $ERR 770 fi 771 772 # Report any block device change. Ignore 773 # character devices, only the name is 774 # significant. 775 cat $TMP2 $CUR $TMP1 | \ 776 sed -e '/^c/d' | \ 777 sort -k11 | \ 778 sed -e 's/[ ][ ]*/ /g' | \ 779 uniq -u > $OUTPUT 780 if [ -s $OUTPUT ] ; then 781 printf "Block device changes:\n" >> $ERR 782 column -t $OUTPUT >> $ERR 783 printf "\n" >> $ERR 784 fi 785 786 backup_file update $TMP1 $CUR $BACK 787 fi 788 else 789 printf "Device additions:\n" >> $ERR 790 column -t $TMP1 >> $ERR 791 printf "\n" >> $ERR 792 backup_file add $TMP1 $CUR $BACK >> $ERR 793 fi 794 fi 795 if [ -s $ERR ] ; then 796 printf "\nChecking setuid files and devices:\n" 797 cat $ERR 798 printf "\n" 799 fi 800fi 801 802# Check special files. 803# Check system binaries. 804# 805# Create the mtree tree specifications using: 806# mtree -cx -pDIR -kmd5,uid,gid,mode,nlink,size,link,time > DIR.secure 807# chown root:wheel DIR.secure 808# chmod u+r,go= DIR.secure 809# 810# Note, this is not complete protection against Trojan horsed binaries, as 811# the hacker can modify the tree specification to match the replaced binary. 812# For details on really protecting yourself against modified binaries, see 813# the mtree(8) manual page. 814# 815if checkyesno check_mtree; then 816 if checkyesno check_mtree_follow_symlinks; then 817 check_mtree_flags="-L" 818 else 819 check_mtree_flags="" 820 fi 821 mtree -e -l -p / $check_mtree_flags -f $SPECIALSPEC 3>&1 >$OUTPUT 2>&3 | 822 grep -v '^mtree: dev/tty: Device not configured$' >&2 823 if [ -s $OUTPUT ]; then 824 printf "\nChecking special files and directories.\n" 825 cat $OUTPUT 826 fi 827 828 for file in /etc/mtree/*.secure; do 829 [ $file = '/etc/mtree/*.secure' ] && continue 830 tree=`sed -n -e '3s/.* //p' -e 3q $file` 831 mtree $check_mtree_flags -f $file -p $tree > $TMP1 832 if [ -s $TMP1 ]; then 833 printf "\nChecking $tree:\n" 834 cat $TMP1 835 fi 836 done > $OUTPUT 837 if [ -s $OUTPUT ]; then 838 printf "\nChecking system binaries:\n" 839 cat $OUTPUT 840 fi 841fi 842 843# Backup disklabels of available disks 844# 845if checkyesno check_disklabels; then 846 # migrate old disklabels 847 for file in `ls -1d $backup_dir/$backup_dir/disklabel.* \ 848 $backup_dir/disklabel.* 2>/dev/null`; do 849 migrate_file "$file" "$work_dir/${file##*/}" 850 done 851 852 # generate list of old disklabels & fdisks and remove them 853 ls -1d $work_dir/disklabel.* $work_dir/fdisk.* 2>/dev/null | 854 egrep -v '\.(backup|current)(,v)?$' > $LABELS 855 xargs rm < $LABELS 856 857 # generate disklabels of all disks excluding: cd fd md 858 disks=`iostat -x | awk 'NR > 1 && $1 !~ /^[cfm]d/ { print $1; }'` 859 for i in $disks; do 860 disklabel $i > "$work_dir/disklabel.$i" 2>/dev/null 861 done 862 863 # if fdisk is available, generate fdisks for: ed ld sd wd 864 if [ -x /sbin/fdisk ]; then 865 disks=`iostat -x| awk 'NR > 1 && $1 ~ /^[elsw]d/ { print $1; }'` 866 for i in $disks; do 867 /sbin/fdisk $i > "$work_dir/fdisk.$i" 2>/dev/null 868 done 869 fi 870 871 # append list of new disklabels and fdisks 872 ls -1d $work_dir/disklabel.* $work_dir/fdisk.* 2>/dev/null | 873 egrep -v '\.(backup|current)(,v)?$' >> $LABELS 874 CHANGELIST="$LABELS $CHANGELIST" 875fi 876 877# Check for changes in the list of installed pkgs 878# 879if checkyesno check_pkgs && [ -d $pkgdb_dir ]; then 880 pkgs=$work_dir/pkgs 881 migrate_file "$backup_dir/pkgs" "$pkgs" 882 ( cd $pkgdb_dir 883 $pkg_info | sort 884 echo "" 885 find . \( -name +REQUIRED_BY -o -name +CONTENTS \) -print0 | 886 xargs -0 ls -ldgTq | sort -t. +1 | sed -e 's, \./, ,' 887 ) > $pkgs 888 echo "$pkgs" > $PKGS 889 CHANGELIST="$PKGS $CHANGELIST" 890fi 891 892# List of files that get backed up and checked for any modifications. 893# Any changes cause the files to rotate. 894# 895if checkyesno check_changelist ; then 896 mtree -D -k type -f $SPECIALSPEC -E exclude | 897 sed '/^type=file/!d ; s/type=file \.//' | unvis > $CHANGEFILES 898 899 ( 900 # Add other files which might dynamically exist: 901 # /etc/ifconfig.* 902 # /etc/raid*.conf 903 # /etc/rc.d/* 904 # /etc/rc.conf.d/* 905 # 906 echo "/etc/ifconfig.*" 907 echo "/etc/raid*.conf" 908 echo "/etc/rc.d/*" 909 echo "/etc/rc.conf.d/*" 910 911 # Add /etc/changelist 912 # 913 if [ -s /etc/changelist ]; then 914 grep -v '^#' /etc/changelist 915 fi 916 ) | while read file; do 917 case "$file" in 918 *[\*\?\[]*) # If changelist line is a glob ... 919 # ... expand possible backup files 920 # 921 ls -1d $(echo $backup_dir/${file}.current) 2>/dev/null \ 922 | sed "s,^$backup_dir/,, ; s,\.current$,," 923 924 # ... expand possible files 925 # 926 ls -1d $(echo $file) 2>/dev/null 927 ;; 928 *) 929 # Otherwise, just print the filename 930 echo $file 931 ;; 932 esac 933 done >> $CHANGEFILES 934 CHANGELIST="$CHANGEFILES $CHANGELIST" 935fi 936 937# Special case backups, including the master password file and 938# ssh private host keys. The normal backup mechanisms for 939# $check_changelist (see below) also print out the actual file 940# differences and we don't want to do that for these files 941# 942echo $MP > $TMP1 # always add /etc/master.passwd 943mtree -D -k type -f $SPECIALSPEC -I nodiff | 944 sed '/^type=file/!d ; s/type=file \.//' | unvis >> $TMP1 945grep -v '^$' $TMP1 | sort -u > $TMP2 946 947while read file; do 948 backup_and_diff "$file" no 949done < $TMP2 950 951 952if [ -n "$CHANGELIST" ]; then 953 grep -h -v '^$' $CHANGELIST | sort -u > $TMP1 954 comm -23 $TMP1 $TMP2 | while read file; do 955 backup_and_diff "$file" yes 956 done 957fi 958 959if [ -f /etc/security.local ]; then 960 . /etc/security.local > $OUTPUT 2>&1 961 if [ -s $OUTPUT ] ; then 962 printf "\nRunning /etc/security.local:\n" 963 cat $OUTPUT 964 fi 965fi 966