security revision 1.88.2.1
1#!/bin/sh - 2# 3# $NetBSD: security,v 1.88.2.1 2007/05/27 21:26:12 bouyer Exp $ 4# from: @(#)security 8.1 (Berkeley) 6/9/93 5# 6 7PATH=/sbin:/usr/sbin:/bin:/usr/bin 8 9if [ -f /etc/rc.subr ]; then 10 . /etc/rc.subr 11else 12 echo "Can't read /etc/rc.subr; aborting." 13 exit 1; 14fi 15 16umask 077 17TZ=UTC; export TZ 18 19if [ -s /etc/security.conf ]; then 20 . /etc/security.conf 21fi 22 23# Set reasonable defaults (if they're not set in security.conf) 24# 25backup_dir=${backup_dir:-/var/backups} 26pkgdb_dir=${pkgdb_dir:-/var/db/pkg} 27max_loginlen=${max_loginlen:-8} 28max_grouplen=${max_grouplen:-8} 29 30# Other configurable variables 31# 32special_files="/etc/mtree/special /etc/mtree/special.local" 33MP=/etc/master.passwd 34CHANGELIST="" 35work_dir=$backup_dir/work 36 37if [ ! -d "$work_dir" ]; then 38 mkdir -p "$work_dir" 39fi 40 41SECUREDIR=`mktemp -d /tmp/_securedir.XXXXXX` || exit 1 42 43trap "/bin/rm -rf $SECUREDIR ; exit 0" EXIT INT QUIT PIPE 44 45if ! cd "$SECUREDIR"; then 46 echo "Can not cd to $SECUREDIR". 47 exit 1 48fi 49 50ERR=secure1.$$ 51TMP1=secure2.$$ 52TMP2=secure3.$$ 53MPBYUID=secure4.$$ 54MPBYPATH=secure5.$$ 55LIST=secure6.$$ 56OUTPUT=secure7.$$ 57LABELS=secure8.$$ 58PKGS=secure9.$$ 59CHANGEFILES=secure10.$$ 60 61 62# migrate_file old new 63# Determine if the "${old}" path name needs to be migrated to the 64# "${new}" path. Also checks if "${old}.current" needs migrating, 65# and if so, migrate it and possibly "${old}.current,v" and 66# "${old}.backup". 67# 68migrate_file() 69{ 70 _old=$1 71 _new=$2 72 if [ -z "$_old" -o -z "$_new" ]; then 73 err 3 "USAGE: migrate_file old new" 74 fi 75 if [ ! -d "${_new%/*}" ]; then 76 mkdir -p "${_new%/*}" 77 fi 78 if [ -f "${_old}" -a ! -f "${_new}" ]; then 79 echo "==> migrating ${_old}" 80 echo " to ${_new}" 81 mv "${_old}" "${_new}" 82 fi 83 if [ -f "${_old}.current" -a ! -f "${_new}.current" ]; then 84 echo "==> migrating ${_old}.current" 85 echo " to ${_new}.current" 86 mv "${_old}.current" "${_new}.current" 87 if [ -f "${_old}.current,v" -a ! -f "${_new}.current,v" ]; then 88 echo "==> migrating ${_old}.current,v" 89 echo " to ${_new}.current,v" 90 mv "${_old}.current,v" "${_new}.current,v" 91 fi 92 if [ -f "${_old}.backup" -a ! -f "${_new}.backup" ]; then 93 echo "==> migrating ${_old}.backup" 94 echo " to ${_new}.backup" 95 mv "${_old}.backup" "${_new}.backup" 96 fi 97 fi 98} 99 100 101# backup_and_diff file printdiff 102# Determine if file needs backing up, and if so, do it. 103# If printdiff is yes, display the diffs, otherwise 104# just print a message saying "[changes omitted]". 105# 106backup_and_diff() 107{ 108 _file=$1 109 _printdiff=$2 110 if [ -z "$_file" -o -z "$_printdiff" ]; then 111 err 3 "USAGE: backup_and_diff file printdiff" 112 fi 113 ! checkyesno _printdiff 114 _printdiff=$? 115 116 _old=$backup_dir/${_file##*/} 117 case "$_file" in 118 $work_dir/*) 119 _new=$_file 120 migrate_file "$backup_dir/$_old" "$_new" 121 migrate_file "$_old" "$_new" 122 ;; 123 *) 124 _new=$backup_dir/$_file 125 migrate_file "$_old" "$_new" 126 ;; 127 esac 128 CUR=${_new}.current 129 BACK=${_new}.backup 130 if [ -f $_file ]; then 131 if [ -f $CUR ] ; then 132 if [ "$_printdiff" -ne 0 ]; then 133 diff ${diff_options} $CUR $_file > $OUTPUT 134 else 135 if ! cmp -s $CUR $_file; then 136 echo "[changes omitted]" 137 fi > $OUTPUT 138 fi 139 if [ -s $OUTPUT ] ; then 140 printf \ 141 "\n======\n%s diffs (OLD < > NEW)\n======\n" $_file 142 cat $OUTPUT 143 backup_file update $_file $CUR $BACK 144 fi 145 else 146 printf "\n======\n%s added\n======\n" $_file 147 if [ "$_printdiff" -ne 0 ]; then 148 diff ${diff_options} /dev/null $_file 149 else 150 echo "[changes omitted]" 151 fi 152 backup_file add $_file $CUR $BACK 153 fi 154 else 155 if [ -f $CUR ]; then 156 printf "\n======\n%s removed\n======\n" $_file 157 if [ "$_printdiff" -ne 0 ]; then 158 diff ${diff_options} $CUR /dev/null 159 else 160 echo "[changes omitted]" 161 fi 162 backup_file remove $_file $CUR $BACK 163 fi 164 fi 165} 166 167 168# These are used several times. 169# 170awk -F: '!/^+/ { print $1 " " $3 }' $MP | sort -k2n > $MPBYUID 171awk -F: '{ print $1 " " $9 }' $MP | sort -k2 > $MPBYPATH 172 173 174# Check the master password file syntax. 175# 176if checkyesno check_passwd; then 177 # XXX: the sense of permit_star is reversed; the code works as 178 # implemented, but usage needs to be negated. 179 checkyesno check_passwd_permit_star && permit_star=0 || permit_star=1 180 awk -v "len=$max_loginlen" \ 181 -v "nowarn_shells_list=$check_passwd_nowarn_shells" \ 182 -v "nowarn_users_list=$check_passwd_nowarn_users" \ 183 -v "permit_star=$permit_star" ' 184 BEGIN { 185 while ( getline < "/etc/shells" > 0 ) { 186 if ($0 ~ /^\#/ || $0 ~ /^$/ ) 187 continue; 188 shells[$1]++; 189 } 190 split(nowarn_shells_list, a); 191 for (i in a) nowarn_shells[a[i]]++; 192 split(nowarn_users_list, a); 193 for (i in a) nowarn_users[a[i]]++; 194 uid0_users_list="root toor" 195 split(uid0_users_list, a); 196 for (i in a) uid0_users[a[i]]++; 197 FS=":"; 198 } 199 200 { 201 if ($0 ~ /^[ ]*$/) { 202 printf "Line %d is a blank line.\n", NR; 203 next; 204 } 205 if (NF != 10 && ($1 != "+" || NF != 1)) 206 printf "Line %d has the wrong number of fields.\n", NR; 207 if ($1 == "+" ) { 208 if (NF != 1 && $3 == 0) 209 printf "Line %d includes entries with uid 0.\n", 210 NR; 211 next; 212 } 213 if ($1 !~ /^[A-Za-z0-9]([-A-Za-z0-9]*[A-Za-z0-9])*$/) 214 printf "Login %s has non-alphanumeric characters.\n", 215 $1; 216 if (length($1) > len) 217 printf "Login %s has more than "len" characters.\n", 218 $1; 219 if ($2 == "" && !nowarn_users[$1]) 220 printf "Login %s has no password.\n", $1; 221 if (!nowarn_shells[$10] && !nowarn_users[$1]) { 222 if (length($2) != 13 && 223 length($2) != 20 && 224 $2 !~ /^\$1/ && 225 $2 !~ /^\$2/ && 226 $2 != "" && 227 (permit_star || $2 != "*") && 228 $2 !~ /^\*[A-z-]+$/ && 229 $1 != "toor") { 230 if ($10 == "" || shells[$10]) 231 printf "Login %s is off but still has "\ 232 "a valid shell (%s)\n", $1, $10; 233 } else if (! shells[$10]) 234 printf "Login %s does not have a valid "\ 235 "shell (%s)\n", $1, $10; 236 } 237 if ($3 == 0 && !uid0_users[$1] && !nowarn_users[$1]) 238 printf "Login %s has a user id of 0.\n", $1; 239 if ($3 < 0) 240 printf "Login %s has a negative user id.\n", $1; 241 if ($4 < 0) 242 printf "Login %s has a negative group id.\n", $1; 243 }' < $MP > $OUTPUT 244 if [ -s $OUTPUT ] ; then 245 printf "\nChecking the $MP file:\n" 246 cat $OUTPUT 247 fi 248 249 awk -F: '{ print $1 }' $MP | sort | uniq -d > $OUTPUT 250 if [ -s $OUTPUT ] ; then 251 printf "\n$MP has duplicate user names.\n" 252 column $OUTPUT 253 fi 254 255# To not exclude 'toor', a standard duplicate root account, from the duplicate 256# account test, uncomment the line below (without egrep in it)and comment 257# out the line (with egrep in it) below it. 258# 259# < $MPBYUID uniq -d -f 1 | awk '{ print $2 }' > $TMP2 260 < $MPBYUID egrep -v '^toor ' | uniq -d -f 1 | awk '{ print $2 }' > $TMP2 261 if [ -s $TMP2 ] ; then 262 printf "\n$MP has duplicate user id's.\n" 263 while read uid; do 264 grep -w $uid $MPBYUID 265 done < $TMP2 | column 266 fi 267fi 268 269# Check the group file syntax. 270# 271if checkyesno check_group; then 272 GRP=/etc/group 273 awk -F: -v "len=$max_grouplen" '{ 274 if ($0 ~ /^[ ]*$/) { 275 printf "Line %d is a blank line.\n", NR; 276 next; 277 } 278 if (NF != 4 && ($1 != "+" || NF != 1)) 279 printf "Line %d has the wrong number of fields.\n", NR; 280 if ($1 == "+" ) { 281 next; 282 } 283 if ($1 !~ /^[A-Za-z0-9]([-A-Za-z0-9]*[A-Za-z0-9])*$/) 284 printf "Group %s has non-alphanumeric characters.\n", 285 $1; 286 if (length($1) > len) 287 printf "Group %s has more than "len" characters.\n", $1; 288 if ($3 !~ /[0-9]*/) 289 printf "Login %s has a negative group id.\n", $1; 290 }' < $GRP > $OUTPUT 291 if [ -s $OUTPUT ] ; then 292 printf "\nChecking the $GRP file:\n" 293 cat $OUTPUT 294 fi 295 296 awk -F: '{ print $1 }' $GRP | sort | uniq -d > $OUTPUT 297 if [ -s $OUTPUT ] ; then 298 printf "\n$GRP has duplicate group names.\n" 299 column $OUTPUT 300 fi 301fi 302 303# Check for root paths, umask values in startup files. 304# The check for the root paths is problematical -- it's likely to fail 305# in other environments. Once the shells have been modified to warn 306# of '.' in the path, the path tests should go away. 307# 308if checkyesno check_rootdotfiles; then 309 rhome=~root 310 umaskset=no 311 list="/etc/csh.cshrc /etc/csh.login ${rhome}/.cshrc ${rhome}/.login" 312 for i in $list ; do 313 if [ -f $i ] ; then 314 if egrep '^[ \t]*umask[ \t]+[0-7]+' $i > /dev/null ; 315 then 316 umaskset=yes 317 fi 318 # Double check the umask value itself; ensure that 319 # both the group and other write bits are set. 320 # 321 egrep '^[ \t]*umask[ \t]+[0-7]+' $i | 322 awk '{ 323 if ($2 ~ /^.$/ || $2 ~! /[^2367].$/) { 324 print "\tRoot umask is group writable" 325 } 326 if ($2 ~ /[^2367]$/) { 327 print "\tRoot umask is other writable" 328 } 329 }' | sort -u 330 SAVE_PATH=$PATH 331 unset PATH 332 /bin/csh -f -s << end-of-csh > /dev/null 2>&1 333 source $i 334 /bin/ls -ldgT \$path > $TMP1 335end-of-csh 336 export PATH=$SAVE_PATH 337 awk '{ 338 if ($10 ~ /^\.$/) { 339 print "\tThe root path includes ."; 340 next; 341 } 342 } 343 $1 ~ /^d....w/ \ 344 { print "\tRoot path directory " $10 " is group writable." } \ 345 $1 ~ /^d.......w/ \ 346 { print "\tRoot path directory " $10 " is other writable." }' \ 347 < $TMP1 348 fi 349 done > $OUTPUT 350 if [ $umaskset = "no" -o -s $OUTPUT ] ; then 351 printf "\nChecking root csh paths, umask values:\n$list\n\n" 352 if [ -s $OUTPUT ]; then 353 cat $OUTPUT 354 fi 355 if [ $umaskset = "no" ] ; then 356 printf "\tRoot csh startup files do not set the umask.\n" 357 fi 358 fi 359 360 umaskset=no 361 list="/etc/profile ${rhome}/.profile" 362 for i in $list; do 363 if [ -f $i ] ; then 364 if egrep umask $i > /dev/null ; then 365 umaskset=yes 366 fi 367 egrep umask $i | 368 awk '$2 ~ /^.$/ || $2 ~ /[^2367].$/ \ 369 { print "\tRoot umask is group writable" } \ 370 $2 ~ /[^2367]$/ \ 371 { print "\tRoot umask is other writable" }' 372 SAVE_PATH=$PATH 373 unset PATH 374 /bin/sh << end-of-sh > /dev/null 2>&1 375 . $i 376 list=\`echo \$PATH | /usr/bin/sed -e \ 377 's/^:/.:/;s/:$/:./;s/::/:.:/g;s/:/ /g'\` 378 /bin/ls -ldgT \$list > $TMP1 379end-of-sh 380 export PATH=$SAVE_PATH 381 awk '{ 382 if ($10 ~ /^\.$/) { 383 print "\tThe root path includes ."; 384 next; 385 } 386 } 387 $1 ~ /^d....w/ \ 388 { print "\tRoot path directory " $10 " is group writable." } \ 389 $1 ~ /^d.......w/ \ 390 { print "\tRoot path directory " $10 " is other writable." }' \ 391 < $TMP1 392 393 fi 394 done > $OUTPUT 395 if [ $umaskset = "no" -o -s $OUTPUT ] ; then 396 printf "\nChecking root sh paths, umask values:\n$list\n" 397 if [ -s $OUTPUT ]; then 398 cat $OUTPUT 399 fi 400 if [ $umaskset = "no" ] ; then 401 printf "\tRoot sh startup files do not set the umask.\n" 402 fi 403 fi 404fi 405 406# Root and uucp should both be in /etc/ftpusers. 407# 408if checkyesno check_ftpusers; then 409 list="uucp "`awk '$2 == 0 { print $1 }' $MPBYUID` 410 for i in $list; do 411 if /usr/libexec/ftpd -C $i ; then 412 printf "\t$i is not denied\n" 413 fi 414 done > $OUTPUT 415 if [ -s $OUTPUT ]; then 416 printf "\nChecking the /etc/ftpusers configuration:\n" 417 cat $OUTPUT 418 fi 419fi 420 421# Uudecode should not be in the /etc/mail/aliases file. 422# 423if checkyesno check_aliases; then 424 for f in /etc/mail/aliases /etc/aliases; do 425 if [ -f $f ] && egrep '^[^#]*(uudecode|decode).*\|' $f; then 426 printf "\nEntry for uudecode in $f file.\n" 427 fi 428 done 429fi 430 431# Files that should not have + signs. 432# 433if checkyesno check_rhosts; then 434 list="/etc/hosts.equiv /etc/hosts.lpd" 435 for f in $list ; do 436 if [ -f $f ] && egrep '\+' $f > /dev/null ; then 437 printf "\nPlus sign in $f file.\n" 438 fi 439 done 440 441 # Check for special users with .rhosts files. Only root and toor should 442 # have .rhosts files. Also, .rhosts files should not have plus signs. 443 awk -F: '$1 != "root" && $1 != "toor" && \ 444 ($3 < 100 || $1 == "ftp" || $1 == "uucp") \ 445 { print $1 " " $9 }' $MP | 446 sort -k2 | 447 while read uid homedir; do 448 if [ -f ${homedir}/.rhosts ] ; then 449 rhost=`ls -ldgT ${homedir}/.rhosts` 450 printf -- "$uid: $rhost\n" 451 fi 452 done > $OUTPUT 453 if [ -s $OUTPUT ] ; then 454 printf "\nChecking for special users with .rhosts files.\n" 455 cat $OUTPUT 456 fi 457 458 while read uid homedir; do 459 if [ -f ${homedir}/.rhosts -a -r ${homedir}/.rhosts ] && \ 460 cat -f ${homedir}/.rhosts | egrep '\+' > /dev/null ; then 461 printf -- "$uid: + in .rhosts file.\n" 462 fi 463 done < $MPBYPATH > $OUTPUT 464 if [ -s $OUTPUT ] ; then 465 printf "\nChecking .rhosts files syntax.\n" 466 cat $OUTPUT 467 fi 468fi 469 470# Check home directories. Directories should not be owned by someone else 471# or writable. 472# 473if checkyesno check_homes; then 474 checkyesno check_homes_permit_usergroups && \ 475 permit_usergroups=1 || permit_usergroups=0 476 while read uid homedir; do 477 if [ -d ${homedir}/ ] ; then 478 file=`ls -ldgT ${homedir}` 479 printf -- "$uid $file\n" 480 fi 481 done < $MPBYPATH | 482 awk -v "usergroups=$permit_usergroups" ' 483 $1 != $4 && $4 != "root" \ 484 { print "user " $1 " home directory is owned by " $4 } 485 $2 ~ /^d....w/ && (!usergroups || $5 != $1) \ 486 { print "user " $1 " home directory is group writable" } 487 $2 ~ /^d.......w/ \ 488 { print "user " $1 " home directory is other writable" }' \ 489 > $OUTPUT 490 if [ -s $OUTPUT ] ; then 491 printf "\nChecking home directories.\n" 492 cat $OUTPUT 493 fi 494 495 # Files that should not be owned by someone else or readable. 496 list=".Xauthority .netrc .ssh/id_dsa .ssh/id_rsa .ssh/identity" 497 while read uid homedir; do 498 for f in $list ; do 499 file=${homedir}/${f} 500 if [ -f $file ] ; then 501 printf -- "$uid $f `ls -ldgT $file`\n" 502 fi 503 done 504 done < $MPBYPATH | 505 awk -v "usergroups=$permit_usergroups" ' 506 $1 != $5 && $5 != "root" \ 507 { print "user " $1 " " $2 " file is owned by " $5 } 508 $3 ~ /^-...r/ && (!usergroups || $6 != $1) \ 509 { print "user " $1 " " $2 " file is group readable" } 510 $3 ~ /^-......r/ \ 511 { print "user " $1 " " $2 " file is other readable" } 512 $3 ~ /^-....w/ && (!usergroups || $6 != $1) \ 513 { print "user " $1 " " $2 " file is group writable" } 514 $3 ~ /^-.......w/ \ 515 { print "user " $1 " " $2 " file is other writable" }' \ 516 > $OUTPUT 517 518 # Files that should not be owned by someone else or writable. 519 list=".bash_history .bash_login .bash_logout .bash_profile .bashrc \ 520 .cshrc .emacs .exrc .forward .history .k5login .klogin .login \ 521 .logout .profile .qmail .rc_history .rhosts .shosts ssh .tcshrc \ 522 .twmrc .xinitrc .xsession .ssh/authorized_keys \ 523 .ssh/authorized_keys2 .ssh/config .ssh/id_dsa.pub \ 524 .ssh/id_rsa.pub .ssh/identity.pub .ssh/known_hosts \ 525 .ssh/known_hosts2" 526 while read uid homedir; do 527 for f in $list ; do 528 file=${homedir}/${f} 529 if [ -f $file ] ; then 530 printf -- "$uid $f `ls -ldgT $file`\n" 531 fi 532 done 533 done < $MPBYPATH | 534 awk -v "usergroups=$permit_usergroups" ' 535 $1 != $5 && $5 != "root" \ 536 { print "user " $1 " " $2 " file is owned by " $5 } 537 $3 ~ /^-....w/ && (!usergroups || $6 != $1) \ 538 { print "user " $1 " " $2 " file is group writable" } 539 $3 ~ /^-.......w/ \ 540 { print "user " $1 " " $2 " file is other writable" }' \ 541 >> $OUTPUT 542 if [ -s $OUTPUT ] ; then 543 printf "\nChecking dot files.\n" 544 cat $OUTPUT 545 fi 546fi 547 548# Mailboxes should be owned by user and unreadable. 549# 550if checkyesno check_varmail; then 551 ls -lA /var/mail | \ 552 awk ' NR == 1 { next; } 553 $9 ~ /^\./ {next; } 554 $3 != $9 { 555 print "user " $9 " mailbox is owned by " $3 556 } 557 $1 != "-rw-------" { 558 print "user " $9 " mailbox is " $1 ", group " $4 559 }' > $OUTPUT 560 if [ -s $OUTPUT ] ; then 561 printf "\nChecking mailbox ownership.\n" 562 cat $OUTPUT 563 fi 564fi 565 566# NFS exports shouldn't be globally exported 567# 568if checkyesno check_nfs && [ -f /etc/exports ]; then 569 awk '{ 570 # ignore comments and blank lines 571 if ($0 ~ /^\#/ || $0 ~ /^$/ ) 572 next; 573 574 readonly = 0; 575 for (i = 2; i <= NF; ++i) { 576 if ($i ~ /-ro/) 577 readonly = 1; 578 else if ($i !~ /^-/) 579 next; 580 } 581 if (readonly) 582 print "File system " $1 " globally exported, read-only." 583 else 584 print "File system " $1 " globally exported, read-write." 585 }' < /etc/exports > $OUTPUT 586 if [ -s $OUTPUT ] ; then 587 printf "\nChecking for globally exported file systems.\n" 588 cat $OUTPUT 589 fi 590fi 591 592# Display any changes in setuid files and devices. 593# 594if checkyesno check_devices; then 595 > $ERR 596 (find / \( ! -fstype local -o -fstype fdesc -o -fstype kernfs \ 597 -o -fstype null \ 598 -o -fstype procfs \) -a -prune -o \ 599 \( \( -perm -u+s -a ! -type d \) -o \ 600 \( -perm -g+s -a ! -type d \) -o \ 601 -type b -o -type c \) -print0 | \ 602 xargs -0 ls -ldgTq | sort +9 > $LIST) 2> $OUTPUT 603 604 # Display any errors that occurred during system file walk. 605 if [ -s $OUTPUT ] ; then 606 printf "Setuid/device find errors:\n" >> $ERR 607 cat $OUTPUT >> $ERR 608 printf "\n" >> $ERR 609 fi 610 611 # Display any changes in the setuid file list. 612 egrep -v '^[bc]' $LIST > $TMP1 613 if [ -s $TMP1 ] ; then 614 # Check to make sure uudecode isn't setuid. 615 if grep -w uudecode $TMP1 > /dev/null ; then 616 printf "\nUudecode is setuid.\n" >> $ERR 617 fi 618 619 file=$work_dir/setuid 620 migrate_file "$backup_dir/setuid" "$file" 621 CUR=${file}.current 622 BACK=${file}.backup 623 if [ -s $CUR ] ; then 624 if cmp -s $CUR $TMP1 ; then 625 : 626 else 627 > $TMP2 628 join -110 -210 -v2 $CUR $TMP1 > $OUTPUT 629 if [ -s $OUTPUT ] ; then 630 printf "Setuid additions:\n" >> $ERR 631 tee -a $TMP2 < $OUTPUT >> $ERR 632 printf "\n" >> $ERR 633 fi 634 635 join -110 -210 -v1 $CUR $TMP1 > $OUTPUT 636 if [ -s $OUTPUT ] ; then 637 printf "Setuid deletions:\n" >> $ERR 638 tee -a $TMP2 < $OUTPUT >> $ERR 639 printf "\n" >> $ERR 640 fi 641 642 sort -k10 $TMP2 $CUR $TMP1 | \ 643 sed -e 's/[ ][ ]*/ /g' | \ 644 uniq -u > $OUTPUT 645 if [ -s $OUTPUT ] ; then 646 printf "Setuid changes:\n" >> $ERR 647 column -t $OUTPUT >> $ERR 648 printf "\n" >> $ERR 649 fi 650 651 backup_file update $TMP1 $CUR $BACK 652 fi 653 else 654 printf "Setuid additions:\n" >> $ERR 655 column -t $TMP1 >> $ERR 656 printf "\n" >> $ERR 657 backup_file add $TMP1 $CUR $BACK 658 fi 659 fi 660 661 # Check for block and character disk devices that are readable or 662 # writable or not owned by root.operator. 663 >$TMP1 664 DISKLIST="ccd ch hk hp ld md ra raid rb rd rl rx \ 665 sd se ss uk up vnd wd xd xy" 666# DISKLIST="$DISKLIST ct mt st wt" 667 for i in $DISKLIST; do 668 egrep "^b.*/${i}[0-9][0-9]*[a-p]$" $LIST >> $TMP1 669 egrep "^c.*/r${i}[0-9][0-9]*[a-p]$" $LIST >> $TMP1 670 done 671 672 awk '$3 != "root" || $4 != "operator" || $1 !~ /.rw-r-----/ \ 673 { printf "Disk %s is user %s, group %s, permissions %s.\n", \ 674 $11, $3, $4, $1; }' < $TMP1 > $OUTPUT 675 if [ -s $OUTPUT ] ; then 676 printf "\nChecking disk ownership and permissions.\n" >> $ERR 677 cat $OUTPUT >> $ERR 678 printf "\n" >> $ERR 679 fi 680 681 # Display any changes in the device file list. 682 egrep '^[bc]' $LIST | sort -k11 > $TMP1 683 if [ -s $TMP1 ] ; then 684 file=$work_dir/device 685 migrate_file "$backup_dir/device" "$file" 686 CUR=${file}.current 687 BACK=${file}.backup 688 689 if [ -s $CUR ] ; then 690 if cmp -s $CUR $TMP1 ; then 691 : 692 else 693 > $TMP2 694 join -111 -211 -v2 $CUR $TMP1 > $OUTPUT 695 if [ -s $OUTPUT ] ; then 696 printf "Device additions:\n" >> $ERR 697 tee -a $TMP2 < $OUTPUT >> $ERR 698 printf "\n" >> $ERR 699 fi 700 701 join -111 -211 -v1 $CUR $TMP1 > $OUTPUT 702 if [ -s $OUTPUT ] ; then 703 printf "Device deletions:\n" >> $ERR 704 tee -a $TMP2 < $OUTPUT >> $ERR 705 printf "\n" >> $ERR 706 fi 707 708 # Report any block device change. Ignore 709 # character devices, only the name is 710 # significant. 711 cat $TMP2 $CUR $TMP1 | \ 712 sed -e '/^c/d' | \ 713 sort -k11 | \ 714 sed -e 's/[ ][ ]*/ /g' | \ 715 uniq -u > $OUTPUT 716 if [ -s $OUTPUT ] ; then 717 printf "Block device changes:\n" >> $ERR 718 column -t $OUTPUT >> $ERR 719 printf "\n" >> $ERR 720 fi 721 722 backup_file update $TMP1 $CUR $BACK 723 fi 724 else 725 printf "Device additions:\n" >> $ERR 726 column -t $TMP1 >> $ERR 727 printf "\n" >> $ERR 728 backup_file add $TMP1 $CUR $BACK >> $ERR 729 fi 730 fi 731 if [ -s $ERR ] ; then 732 printf "\nChecking setuid files and devices:\n" 733 cat $ERR 734 printf "\n" 735 fi 736fi 737 738# Check special files. 739# Check system binaries. 740# 741# Create the mtree tree specifications using: 742# mtree -cx -pDIR -kmd5,uid,gid,mode,nlink,size,link,time > DIR.secure 743# chown root:wheel DIR.secure 744# chmod u+r,go= DIR.secure 745# 746# Note, this is not complete protection against Trojan horsed binaries, as 747# the hacker can modify the tree specification to match the replaced binary. 748# For details on really protecting yourself against modified binaries, see 749# the mtree(8) manual page. 750# 751if checkyesno check_mtree; then 752 if checkyesno check_mtree_follow_symlinks; then 753 check_mtree_flags="-L" 754 else 755 check_mtree_flags="" 756 fi 757 for file in $special_files; do 758 [ ! -s $file ] && continue 759 mtree -e -l -p / $check_mtree_flags -f $file 760 done 3>&1 >$OUTPUT 2>&3 | 761 grep -v '^mtree: dev/tty: Device not configured$' >&2 762 if [ -s $OUTPUT ]; then 763 printf "\nChecking special files and directories.\n" 764 cat $OUTPUT 765 fi 766 767 for file in /etc/mtree/*.secure; do 768 [ $file = '/etc/mtree/*.secure' ] && continue 769 tree=`sed -n -e '3s/.* //p' -e 3q $file` 770 mtree $check_mtree_flags -f $file -p $tree > $TMP1 771 if [ -s $TMP1 ]; then 772 printf "\nChecking $tree:\n" 773 cat $TMP1 774 fi 775 done > $OUTPUT 776 if [ -s $OUTPUT ]; then 777 printf "\nChecking system binaries:\n" 778 cat $OUTPUT 779 fi 780fi 781 782# Backup disklabels of available disks 783# 784if checkyesno check_disklabels; then 785 # migrate old disklabels 786 for file in `ls -1d $backup_dir/$backup_dir/disklabel.* \ 787 $backup_dir/disklabel.* 2>/dev/null`; do 788 migrate_file "$file" "$work_dir/${file##*/}" 789 done 790 791 # generate list of old disklabels & fdisks and remove them 792 ls -1d $work_dir/disklabel.* $work_dir/fdisk.* 2>/dev/null | 793 egrep -v '\.(backup|current)(,v)?$' > $LABELS 794 xargs rm < $LABELS 795 796 # generate disklabels of all disks excluding: cd fd md 797 disks=`iostat -x | awk 'NR > 1 && $1 !~ /^[cfm]d/ { print $1; }'` 798 for i in $disks; do 799 disklabel $i > "$work_dir/disklabel.$i" 2>/dev/null 800 done 801 802 # if fdisk is available, generate fdisks for: ed ld sd wd 803 if [ -x /sbin/fdisk ]; then 804 disks=`iostat -x| awk 'NR > 1 && $1 ~ /^[elsw]d/ { print $1; }'` 805 for i in $disks; do 806 /sbin/fdisk $i > "$work_dir/fdisk.$i" 2>/dev/null 807 done 808 fi 809 810 # append list of new disklabels and fdisks 811 ls -1d $work_dir/disklabel.* $work_dir/fdisk.* 2>/dev/null | 812 egrep -v '\.(backup|current)(,v)?$' >> $LABELS 813 CHANGELIST="$LABELS $CHANGELIST" 814fi 815 816# Check for changes in the list of installed pkgs 817# 818if checkyesno check_pkgs && [ -d $pkgdb_dir ]; then 819 pkgs=$work_dir/pkgs 820 migrate_file "$backup_dir/pkgs" "$pkgs" 821 ( cd $pkgdb_dir 822 pkg_info | sort 823 echo "" 824 find . \( -name +REQUIRED_BY -o -name +CONTENTS \) -print0 | 825 xargs -0 ls -ldgTq | sort -t. +1 | sed -e 's, \./, ,' 826 ) > $pkgs 827 echo "$pkgs" > $PKGS 828 CHANGELIST="$PKGS $CHANGELIST" 829fi 830 831# List of files that get backed up and checked for any modifications. 832# Any changes cause the files to rotate. 833# 834if checkyesno check_changelist ; then 835 for file in $special_files; do 836 [ ! -s $file ] && continue 837 mtree -D -k type -f $file -E exclude | 838 sed '/^type=file/!d ; s/type=file \.//' 839 done > $CHANGEFILES 840 841 ( 842 # Add other files which might dynamically exist: 843 # /etc/ifconfig.* 844 # /etc/raid*.conf 845 # /etc/rc.d/* 846 # /etc/rc.conf.d/* 847 # 848 echo "/etc/ifconfig.*" 849 echo "/etc/raid*.conf" 850 echo "/etc/rc.d/*" 851 echo "/etc/rc.conf.d/*" 852 853 # Add /etc/changelist 854 # 855 if [ -s /etc/changelist ]; then 856 grep -v '^#' /etc/changelist 857 fi 858 ) | while read file; do 859 case "$file" in 860 *[\*\?\[]*) # If changelist line is a glob ... 861 # ... expand possible backup files 862 # 863 ls -1d $(echo $backup_dir/${file}.current) 2>/dev/null \ 864 | sed "s,^$backup_dir/,, ; s,\.current$,," 865 866 # ... expand possible files 867 # 868 ls -1d $(echo $file) 2>/dev/null 869 ;; 870 *) 871 # Otherwise, just print the filename 872 echo $file 873 ;; 874 esac 875 done >> $CHANGEFILES 876 CHANGELIST="$CHANGEFILES $CHANGELIST" 877fi 878 879# Special case backups, including the master password file and 880# ssh private host keys. The normal backup mechanisms for 881# $check_changelist (see below) also print out the actual file 882# differences and we don't want to do that for these files 883# 884echo $MP > $TMP1 # always add /etc/master.passwd 885for file in $special_files; do 886 [ ! -s $file ] && continue 887 mtree -D -k type -f $file -I nodiff | 888 sed '/^type=file/!d ; s/type=file \.//' 889done >> $TMP1 890grep -v '^$' $TMP1 | sort -u > $TMP2 891 892while read file; do 893 backup_and_diff "$file" no 894done < $TMP2 895 896 897if [ -n "$CHANGELIST" ]; then 898 grep -h -v '^$' $CHANGELIST | sort -u > $TMP1 899 comm -23 $TMP1 $TMP2 | while read file; do 900 backup_and_diff "$file" yes 901 done 902fi 903 904if [ -f /etc/security.local ]; then 905 . /etc/security.local > $OUTPUT 906 if [ -s $OUTPUT ] ; then 907 printf "\nRunning /etc/security.local:\n" 908 cat $OUTPUT 909 fi 910fi 911