security revision 1.90
1 #!/bin/sh - 2 # 3 # $NetBSD: security,v 1.90 2004/04/09 17:33:35 kim Exp $ 4 # from: @(#)security 8.1 (Berkeley) 6/9/93 5 # 6 7 PATH=/sbin:/usr/sbin:/bin:/usr/bin 8 9 rcvar_manpage='security.conf(5)' 10 11 if [ -f /etc/rc.subr ]; then 12 . /etc/rc.subr 13 else 14 echo "Can't read /etc/rc.subr; aborting." 15 exit 1; 16 fi 17 18 umask 077 19 TZ=UTC; export TZ 20 21 if [ -s /etc/security.conf ]; then 22 . /etc/security.conf 23 fi 24 25 # Set reasonable defaults (if they're not set in security.conf) 26 # 27 backup_dir=${backup_dir:-/var/backups} 28 pkgdb_dir=${pkgdb_dir:-/var/db/pkg} 29 max_loginlen=${max_loginlen:-8} 30 max_grouplen=${max_grouplen:-8} 31 32 # Other configurable variables 33 # 34 special_files="/etc/mtree/special /etc/mtree/special.local" 35 MP=/etc/master.passwd 36 CHANGELIST="" 37 work_dir=$backup_dir/work 38 39 if [ ! -d "$work_dir" ]; then 40 mkdir -p "$work_dir" 41 fi 42 43 SECUREDIR=`mktemp -d /tmp/_securedir.XXXXXX` || exit 1 44 45 trap "/bin/rm -rf $SECUREDIR ; exit 0" EXIT INT QUIT PIPE 46 47 if ! cd "$SECUREDIR"; then 48 echo "Can not cd to $SECUREDIR". 49 exit 1 50 fi 51 52 ERR=secure1.$$ 53 TMP1=secure2.$$ 54 TMP2=secure3.$$ 55 MPBYUID=secure4.$$ 56 MPBYPATH=secure5.$$ 57 LIST=secure6.$$ 58 OUTPUT=secure7.$$ 59 LABELS=secure8.$$ 60 PKGS=secure9.$$ 61 CHANGEFILES=secure10.$$ 62 63 64 # migrate_file old new 65 # Determine if the "${old}" path name needs to be migrated to the 66 # "${new}" path. Also checks if "${old}.current" needs migrating, 67 # and if so, migrate it and possibly "${old}.current,v" and 68 # "${old}.backup". 69 # 70 migrate_file() 71 { 72 _old=$1 73 _new=$2 74 if [ -z "$_old" -o -z "$_new" ]; then 75 err 3 "USAGE: migrate_file old new" 76 fi 77 if [ ! -d "${_new%/*}" ]; then 78 mkdir -p "${_new%/*}" 79 fi 80 if [ -f "${_old}" -a ! -f "${_new}" ]; then 81 echo "==> migrating ${_old}" 82 echo " to ${_new}" 83 mv "${_old}" "${_new}" 84 fi 85 if [ -f "${_old}.current" -a ! -f "${_new}.current" ]; then 86 echo "==> migrating ${_old}.current" 87 echo " to ${_new}.current" 88 mv "${_old}.current" "${_new}.current" 89 if [ -f "${_old}.current,v" -a ! -f "${_new}.current,v" ]; then 90 echo "==> migrating ${_old}.current,v" 91 echo " to ${_new}.current,v" 92 mv "${_old}.current,v" "${_new}.current,v" 93 fi 94 if [ -f "${_old}.backup" -a ! -f "${_new}.backup" ]; then 95 echo "==> migrating ${_old}.backup" 96 echo " to ${_new}.backup" 97 mv "${_old}.backup" "${_new}.backup" 98 fi 99 fi 100 } 101 102 103 # backup_and_diff file printdiff 104 # Determine if file needs backing up, and if so, do it. 105 # If printdiff is yes, display the diffs, otherwise 106 # just print a message saying "[changes omitted]". 107 # 108 backup_and_diff() 109 { 110 _file=$1 111 _printdiff=$2 112 if [ -z "$_file" -o -z "$_printdiff" ]; then 113 err 3 "USAGE: backup_and_diff file printdiff" 114 fi 115 ! checkyesno _printdiff 116 _printdiff=$? 117 118 _old=$backup_dir/${_file##*/} 119 case "$_file" in 120 $work_dir/*) 121 _new=$_file 122 migrate_file "$backup_dir/$_old" "$_new" 123 migrate_file "$_old" "$_new" 124 ;; 125 *) 126 _new=$backup_dir/$_file 127 migrate_file "$_old" "$_new" 128 ;; 129 esac 130 CUR=${_new}.current 131 BACK=${_new}.backup 132 if [ -f $_file ]; then 133 if [ -f $CUR ] ; then 134 if [ "$_printdiff" -ne 0 ]; then 135 diff ${diff_options} $CUR $_file > $OUTPUT 136 else 137 if ! cmp -s $CUR $_file; then 138 echo "[changes omitted]" 139 fi > $OUTPUT 140 fi 141 if [ -s $OUTPUT ] ; then 142 printf \ 143 "\n======\n%s diffs (OLD < > NEW)\n======\n" $_file 144 cat $OUTPUT 145 backup_file update $_file $CUR $BACK 146 fi 147 else 148 printf "\n======\n%s added\n======\n" $_file 149 if [ "$_printdiff" -ne 0 ]; then 150 diff ${diff_options} /dev/null $_file 151 else 152 echo "[changes omitted]" 153 fi 154 backup_file add $_file $CUR $BACK 155 fi 156 else 157 if [ -f $CUR ]; then 158 printf "\n======\n%s removed\n======\n" $_file 159 if [ "$_printdiff" -ne 0 ]; then 160 diff ${diff_options} $CUR /dev/null 161 else 162 echo "[changes omitted]" 163 fi 164 backup_file remove $_file $CUR $BACK 165 fi 166 fi 167 } 168 169 170 # These are used several times. 171 # 172 awk -F: '!/^+/ { print $1 " " $3 }' $MP | sort -k2n > $MPBYUID 173 awk -F: '{ print $1 " " $9 }' $MP | sort -k2 > $MPBYPATH 174 175 176 # Check the master password file syntax. 177 # 178 if checkyesno check_passwd; then 179 # XXX: the sense of permit_star is reversed; the code works as 180 # implemented, but usage needs to be negated. 181 checkyesno check_passwd_permit_star && permit_star=0 || permit_star=1 182 awk -v "len=$max_loginlen" \ 183 -v "nowarn_shells_list=$check_passwd_nowarn_shells" \ 184 -v "nowarn_users_list=$check_passwd_nowarn_users" \ 185 -v "permit_star=$permit_star" ' 186 BEGIN { 187 while ( getline < "/etc/shells" > 0 ) { 188 if ($0 ~ /^\#/ || $0 ~ /^$/ ) 189 continue; 190 shells[$1]++; 191 } 192 split(nowarn_shells_list, a); 193 for (i in a) nowarn_shells[a[i]]++; 194 split(nowarn_users_list, a); 195 for (i in a) nowarn_users[a[i]]++; 196 uid0_users_list="root toor" 197 split(uid0_users_list, a); 198 for (i in a) uid0_users[a[i]]++; 199 FS=":"; 200 } 201 202 { 203 if ($0 ~ /^[ ]*$/) { 204 printf "Line %d is a blank line.\n", NR; 205 next; 206 } 207 if (NF != 10 && ($1 != "+" || NF != 1)) 208 printf "Line %d has the wrong number of fields.\n", NR; 209 if ($1 == "+" ) { 210 if (NF != 1 && $3 == 0) 211 printf "Line %d includes entries with uid 0.\n", 212 NR; 213 next; 214 } 215 if ($1 !~ /^[A-Za-z0-9]([-A-Za-z0-9]*[A-Za-z0-9])*$/) 216 printf "Login %s has non-alphanumeric characters.\n", 217 $1; 218 if (length($1) > len) 219 printf "Login %s has more than "len" characters.\n", 220 $1; 221 if ($2 == "" && !nowarn_users[$1]) 222 printf "Login %s has no password.\n", $1; 223 if (!nowarn_shells[$10] && !nowarn_users[$1]) { 224 if (length($2) != 13 && 225 length($2) != 20 && 226 $2 !~ /^\$1/ && 227 $2 !~ /^\$2/ && 228 $2 != "" && 229 (permit_star || $2 != "*") && 230 $2 !~ /^\*[A-z-]+$/ && 231 $1 != "toor") { 232 if ($10 == "" || shells[$10]) 233 printf "Login %s is off but still has "\ 234 "a valid shell (%s)\n", $1, $10; 235 } else if (! shells[$10]) 236 printf "Login %s does not have a valid "\ 237 "shell (%s)\n", $1, $10; 238 } 239 if ($3 == 0 && !uid0_users[$1] && !nowarn_users[$1]) 240 printf "Login %s has a user id of 0.\n", $1; 241 if ($3 < 0) 242 printf "Login %s has a negative user id.\n", $1; 243 if ($4 < 0) 244 printf "Login %s has a negative group id.\n", $1; 245 }' < $MP > $OUTPUT 246 if [ -s $OUTPUT ] ; then 247 printf "\nChecking the $MP file:\n" 248 cat $OUTPUT 249 fi 250 251 awk -F: '{ print $1 }' $MP | sort | uniq -d > $OUTPUT 252 if [ -s $OUTPUT ] ; then 253 printf "\n$MP has duplicate user names.\n" 254 column $OUTPUT 255 fi 256 257 # To not exclude 'toor', a standard duplicate root account, from the duplicate 258 # account test, uncomment the line below (without egrep in it)and comment 259 # out the line (with egrep in it) below it. 260 # 261 # < $MPBYUID uniq -d -f 1 | awk '{ print $2 }' > $TMP2 262 < $MPBYUID egrep -v '^toor ' | uniq -d -f 1 | awk '{ print $2 }' > $TMP2 263 if [ -s $TMP2 ] ; then 264 printf "\n$MP has duplicate user id's.\n" 265 while read uid; do 266 grep -w $uid $MPBYUID 267 done < $TMP2 | column 268 fi 269 fi 270 271 # Check the group file syntax. 272 # 273 if checkyesno check_group; then 274 GRP=/etc/group 275 awk -F: -v "len=$max_grouplen" '{ 276 if ($0 ~ /^[ ]*$/) { 277 printf "Line %d is a blank line.\n", NR; 278 next; 279 } 280 if (NF != 4 && ($1 != "+" || NF != 1)) 281 printf "Line %d has the wrong number of fields.\n", NR; 282 if ($1 == "+" ) { 283 next; 284 } 285 if ($1 !~ /^[A-Za-z0-9]([-A-Za-z0-9]*[A-Za-z0-9])*$/) 286 printf "Group %s has non-alphanumeric characters.\n", 287 $1; 288 if (length($1) > len) 289 printf "Group %s has more than "len" characters.\n", $1; 290 if ($3 !~ /[0-9]*/) 291 printf "Login %s has a negative group id.\n", $1; 292 }' < $GRP > $OUTPUT 293 if [ -s $OUTPUT ] ; then 294 printf "\nChecking the $GRP file:\n" 295 cat $OUTPUT 296 fi 297 298 awk -F: '{ print $1 }' $GRP | sort | uniq -d > $OUTPUT 299 if [ -s $OUTPUT ] ; then 300 printf "\n$GRP has duplicate group names.\n" 301 column $OUTPUT 302 fi 303 fi 304 305 # Check for root paths, umask values in startup files. 306 # The check for the root paths is problematical -- it's likely to fail 307 # in other environments. Once the shells have been modified to warn 308 # of '.' in the path, the path tests should go away. 309 # 310 if checkyesno check_rootdotfiles; then 311 rhome=~root 312 umaskset=no 313 list="/etc/csh.cshrc /etc/csh.login ${rhome}/.cshrc ${rhome}/.login" 314 for i in $list ; do 315 if [ -f $i ] ; then 316 if egrep '^[ \t]*umask[ \t]+[0-7]+' $i > /dev/null ; 317 then 318 umaskset=yes 319 fi 320 # Double check the umask value itself; ensure that 321 # both the group and other write bits are set. 322 # 323 egrep '^[ \t]*umask[ \t]+[0-7]+' $i | 324 awk '{ 325 if ($2 ~ /^.$/ || $2 ~! /[^2367].$/) { 326 print "\tRoot umask is group writable" 327 } 328 if ($2 ~ /[^2367]$/) { 329 print "\tRoot umask is other writable" 330 } 331 }' | sort -u 332 SAVE_PATH=$PATH 333 unset PATH 334 /bin/csh -f -s << end-of-csh > /dev/null 2>&1 335 source $i 336 /bin/ls -ldgT \$path > $TMP1 337 end-of-csh 338 export PATH=$SAVE_PATH 339 awk '{ 340 if ($10 ~ /^\.$/) { 341 print "\tThe root path includes ."; 342 next; 343 } 344 } 345 $1 ~ /^d....w/ \ 346 { print "\tRoot path directory " $10 " is group writable." } \ 347 $1 ~ /^d.......w/ \ 348 { print "\tRoot path directory " $10 " is other writable." }' \ 349 < $TMP1 350 fi 351 done > $OUTPUT 352 if [ $umaskset = "no" -o -s $OUTPUT ] ; then 353 printf "\nChecking root csh paths, umask values:\n$list\n\n" 354 if [ -s $OUTPUT ]; then 355 cat $OUTPUT 356 fi 357 if [ $umaskset = "no" ] ; then 358 printf "\tRoot csh startup files do not set the umask.\n" 359 fi 360 fi 361 362 umaskset=no 363 list="/etc/profile ${rhome}/.profile" 364 for i in $list; do 365 if [ -f $i ] ; then 366 if egrep umask $i > /dev/null ; then 367 umaskset=yes 368 fi 369 egrep umask $i | 370 awk '$2 ~ /^.$/ || $2 ~ /[^2367].$/ \ 371 { print "\tRoot umask is group writable" } \ 372 $2 ~ /[^2367]$/ \ 373 { print "\tRoot umask is other writable" }' 374 SAVE_PATH=$PATH 375 unset PATH 376 /bin/sh << end-of-sh > /dev/null 2>&1 377 . $i 378 list=\`echo \$PATH | /usr/bin/sed -e \ 379 's/^:/.:/;s/:$/:./;s/::/:.:/g;s/:/ /g'\` 380 /bin/ls -ldgT \$list > $TMP1 381 end-of-sh 382 export PATH=$SAVE_PATH 383 awk '{ 384 if ($10 ~ /^\.$/) { 385 print "\tThe root path includes ."; 386 next; 387 } 388 } 389 $1 ~ /^d....w/ \ 390 { print "\tRoot path directory " $10 " is group writable." } \ 391 $1 ~ /^d.......w/ \ 392 { print "\tRoot path directory " $10 " is other writable." }' \ 393 < $TMP1 394 395 fi 396 done > $OUTPUT 397 if [ $umaskset = "no" -o -s $OUTPUT ] ; then 398 printf "\nChecking root sh paths, umask values:\n$list\n" 399 if [ -s $OUTPUT ]; then 400 cat $OUTPUT 401 fi 402 if [ $umaskset = "no" ] ; then 403 printf "\tRoot sh startup files do not set the umask.\n" 404 fi 405 fi 406 fi 407 408 # Root and uucp should both be in /etc/ftpusers. 409 # 410 if checkyesno check_ftpusers; then 411 list="uucp "`awk '$2 == 0 { print $1 }' $MPBYUID` 412 for i in $list; do 413 if /usr/libexec/ftpd -C $i ; then 414 printf "\t$i is not denied\n" 415 fi 416 done > $OUTPUT 417 if [ -s $OUTPUT ]; then 418 printf "\nChecking the /etc/ftpusers configuration:\n" 419 cat $OUTPUT 420 fi 421 fi 422 423 # Uudecode should not be in the /etc/mail/aliases file. 424 # 425 if checkyesno check_aliases; then 426 for f in /etc/mail/aliases /etc/aliases; do 427 if [ -f $f ] && egrep '^[^#]*(uudecode|decode).*\|' $f; then 428 printf "\nEntry for uudecode in $f file.\n" 429 fi 430 done 431 fi 432 433 # Files that should not have + signs. 434 # 435 if checkyesno check_rhosts; then 436 list="/etc/hosts.equiv /etc/hosts.lpd" 437 for f in $list ; do 438 if [ -f $f ] && egrep '\+' $f > /dev/null ; then 439 printf "\nPlus sign in $f file.\n" 440 fi 441 done 442 443 # Check for special users with .rhosts files. Only root and toor should 444 # have .rhosts files. Also, .rhosts files should not have plus signs. 445 awk -F: '$1 != "root" && $1 != "toor" && \ 446 ($3 < 100 || $1 == "ftp" || $1 == "uucp") \ 447 { print $1 " " $9 }' $MP | 448 sort -k2 | 449 while read uid homedir; do 450 if [ -f ${homedir}/.rhosts ] ; then 451 rhost=`ls -ldgT ${homedir}/.rhosts` 452 printf -- "$uid: $rhost\n" 453 fi 454 done > $OUTPUT 455 if [ -s $OUTPUT ] ; then 456 printf "\nChecking for special users with .rhosts files.\n" 457 cat $OUTPUT 458 fi 459 460 while read uid homedir; do 461 if [ -f ${homedir}/.rhosts -a -r ${homedir}/.rhosts ] && \ 462 cat -f ${homedir}/.rhosts | egrep '\+' > /dev/null ; then 463 printf -- "$uid: + in .rhosts file.\n" 464 fi 465 done < $MPBYPATH > $OUTPUT 466 if [ -s $OUTPUT ] ; then 467 printf "\nChecking .rhosts files syntax.\n" 468 cat $OUTPUT 469 fi 470 fi 471 472 # Check home directories. Directories should not be owned by someone else 473 # or writable. 474 # 475 if checkyesno check_homes; then 476 checkyesno check_homes_permit_usergroups && \ 477 permit_usergroups=1 || permit_usergroups=0 478 while read uid homedir; do 479 if [ -d ${homedir}/ ] ; then 480 file=`ls -ldgT ${homedir}` 481 printf -- "$uid $file\n" 482 fi 483 done < $MPBYPATH | 484 awk -v "usergroups=$permit_usergroups" ' 485 $1 != $4 && $4 != "root" \ 486 { print "user " $1 " home directory is owned by " $4 } 487 $2 ~ /^-....w/ && (!usergroups || $5 != $1) \ 488 { print "user " $1 " home directory is group writable" } 489 $2 ~ /^-.......w/ \ 490 { print "user " $1 " home directory is other writable" }' \ 491 > $OUTPUT 492 if [ -s $OUTPUT ] ; then 493 printf "\nChecking home directories.\n" 494 cat $OUTPUT 495 fi 496 497 # Files that should not be owned by someone else or readable. 498 list=".Xauthority .netrc .ssh/id_dsa .ssh/id_rsa .ssh/identity" 499 while read uid homedir; do 500 for f in $list ; do 501 file=${homedir}/${f} 502 if [ -f $file ] ; then 503 printf -- "$uid $f `ls -ldgT $file`\n" 504 fi 505 done 506 done < $MPBYPATH | 507 awk -v "usergroups=$permit_usergroups" ' 508 $1 != $5 && $5 != "root" \ 509 { print "user " $1 " " $2 " file is owned by " $5 } 510 $3 ~ /^-...r/ && (!usergroups || $6 != $1) \ 511 { print "user " $1 " " $2 " file is group readable" } 512 $3 ~ /^-......r/ \ 513 { print "user " $1 " " $2 " file is other readable" } 514 $3 ~ /^-....w/ && (!usergroups || $6 != $1) \ 515 { print "user " $1 " " $2 " file is group writable" } 516 $3 ~ /^-.......w/ \ 517 { print "user " $1 " " $2 " file is other writable" }' \ 518 > $OUTPUT 519 520 # Files that should not be owned by someone else or writable. 521 list=".bash_history .bash_login .bash_logout .bash_profile .bashrc \ 522 .cshrc .emacs .exrc .forward .history .k5login .klogin .login \ 523 .logout .profile .qmail .rc_history .rhosts .shosts ssh .tcshrc \ 524 .twmrc .xinitrc .xsession .ssh/authorized_keys \ 525 .ssh/authorized_keys2 .ssh/config .ssh/id_dsa.pub \ 526 .ssh/id_rsa.pub .ssh/identity.pub .ssh/known_hosts \ 527 .ssh/known_hosts2" 528 while read uid homedir; do 529 for f in $list ; do 530 file=${homedir}/${f} 531 if [ -f $file ] ; then 532 printf -- "$uid $f `ls -ldgT $file`\n" 533 fi 534 done 535 done < $MPBYPATH | 536 awk -v "usergroups=$permit_usergroups" ' 537 $1 != $5 && $5 != "root" \ 538 { print "user " $1 " " $2 " file is owned by " $5 } 539 $3 ~ /^-....w/ && (!usergroups || $6 != $1) \ 540 { print "user " $1 " " $2 " file is group writable" } 541 $3 ~ /^-.......w/ \ 542 { print "user " $1 " " $2 " file is other writable" }' \ 543 >> $OUTPUT 544 if [ -s $OUTPUT ] ; then 545 printf "\nChecking dot files.\n" 546 cat $OUTPUT 547 fi 548 fi 549 550 # Mailboxes should be owned by user and unreadable. 551 # 552 if checkyesno check_varmail; then 553 ls -lA /var/mail | \ 554 awk ' NR == 1 { next; } 555 $9 ~ /^\./ {next; } 556 $3 != $9 { 557 print "user " $9 " mailbox is owned by " $3 558 } 559 $1 != "-rw-------" { 560 print "user " $9 " mailbox is " $1 ", group " $4 561 }' > $OUTPUT 562 if [ -s $OUTPUT ] ; then 563 printf "\nChecking mailbox ownership.\n" 564 cat $OUTPUT 565 fi 566 fi 567 568 # NFS exports shouldn't be globally exported 569 # 570 if checkyesno check_nfs && [ -f /etc/exports ]; then 571 awk '{ 572 # ignore comments and blank lines 573 if ($0 ~ /^\#/ || $0 ~ /^$/ ) 574 next; 575 576 readonly = 0; 577 for (i = 2; i <= NF; ++i) { 578 if ($i ~ /-ro/) 579 readonly = 1; 580 else if ($i !~ /^-/) 581 next; 582 } 583 if (readonly) 584 print "File system " $1 " globally exported, read-only." 585 else 586 print "File system " $1 " globally exported, read-write." 587 }' < /etc/exports > $OUTPUT 588 if [ -s $OUTPUT ] ; then 589 printf "\nChecking for globally exported file systems.\n" 590 cat $OUTPUT 591 fi 592 fi 593 594 # Display any changes in setuid files and devices. 595 # 596 if checkyesno check_devices; then 597 > $ERR 598 (find / \( ! -fstype local -o -fstype fdesc -o -fstype kernfs \ 599 -o -fstype null \ 600 -o -fstype procfs \) -a -prune -o \ 601 \( \( -perm -u+s -a ! -type d \) -o \ 602 \( -perm -g+s -a ! -type d \) -o \ 603 -type b -o -type c \) -print0 | \ 604 xargs -0 ls -ldgTq | sort +9 > $LIST) 2> $OUTPUT 605 606 # Display any errors that occurred during system file walk. 607 if [ -s $OUTPUT ] ; then 608 printf "Setuid/device find errors:\n" >> $ERR 609 cat $OUTPUT >> $ERR 610 printf "\n" >> $ERR 611 fi 612 613 # Display any changes in the setuid file list. 614 egrep -v '^[bc]' $LIST > $TMP1 615 if [ -s $TMP1 ] ; then 616 # Check to make sure uudecode isn't setuid. 617 if grep -w uudecode $TMP1 > /dev/null ; then 618 printf "\nUudecode is setuid.\n" >> $ERR 619 fi 620 621 file=$work_dir/setuid 622 migrate_file "$backup_dir/setuid" "$file" 623 CUR=${file}.current 624 BACK=${file}.backup 625 if [ -s $CUR ] ; then 626 if cmp -s $CUR $TMP1 ; then 627 : 628 else 629 > $TMP2 630 join -110 -210 -v2 $CUR $TMP1 > $OUTPUT 631 if [ -s $OUTPUT ] ; then 632 printf "Setuid additions:\n" >> $ERR 633 tee -a $TMP2 < $OUTPUT >> $ERR 634 printf "\n" >> $ERR 635 fi 636 637 join -110 -210 -v1 $CUR $TMP1 > $OUTPUT 638 if [ -s $OUTPUT ] ; then 639 printf "Setuid deletions:\n" >> $ERR 640 tee -a $TMP2 < $OUTPUT >> $ERR 641 printf "\n" >> $ERR 642 fi 643 644 sort -k10 $TMP2 $CUR $TMP1 | \ 645 sed -e 's/[ ][ ]*/ /g' | \ 646 uniq -u > $OUTPUT 647 if [ -s $OUTPUT ] ; then 648 printf "Setuid changes:\n" >> $ERR 649 column -t $OUTPUT >> $ERR 650 printf "\n" >> $ERR 651 fi 652 653 backup_file update $TMP1 $CUR $BACK 654 fi 655 else 656 printf "Setuid additions:\n" >> $ERR 657 column -t $TMP1 >> $ERR 658 printf "\n" >> $ERR 659 backup_file add $TMP1 $CUR $BACK 660 fi 661 fi 662 663 # Check for block and character disk devices that are readable or 664 # writable or not owned by root.operator. 665 >$TMP1 666 DISKLIST="ccd ch hk hp ld md ra raid rb rd rl rx \ 667 sd se ss uk up vnd wd xd xy" 668 # DISKLIST="$DISKLIST ct mt st wt" 669 for i in $DISKLIST; do 670 egrep "^b.*/${i}[0-9][0-9]*[a-p]$" $LIST >> $TMP1 671 egrep "^c.*/r${i}[0-9][0-9]*[a-p]$" $LIST >> $TMP1 672 done 673 674 awk '$3 != "root" || $4 != "operator" || $1 !~ /.rw-r-----/ \ 675 { printf "Disk %s is user %s, group %s, permissions %s.\n", \ 676 $11, $3, $4, $1; }' < $TMP1 > $OUTPUT 677 if [ -s $OUTPUT ] ; then 678 printf "\nChecking disk ownership and permissions.\n" >> $ERR 679 cat $OUTPUT >> $ERR 680 printf "\n" >> $ERR 681 fi 682 683 # Display any changes in the device file list. 684 egrep '^[bc]' $LIST | sort -k11 > $TMP1 685 if [ -s $TMP1 ] ; then 686 file=$work_dir/device 687 migrate_file "$backup_dir/device" "$file" 688 CUR=${file}.current 689 BACK=${file}.backup 690 691 if [ -s $CUR ] ; then 692 if cmp -s $CUR $TMP1 ; then 693 : 694 else 695 > $TMP2 696 join -111 -211 -v2 $CUR $TMP1 > $OUTPUT 697 if [ -s $OUTPUT ] ; then 698 printf "Device additions:\n" >> $ERR 699 tee -a $TMP2 < $OUTPUT >> $ERR 700 printf "\n" >> $ERR 701 fi 702 703 join -111 -211 -v1 $CUR $TMP1 > $OUTPUT 704 if [ -s $OUTPUT ] ; then 705 printf "Device deletions:\n" >> $ERR 706 tee -a $TMP2 < $OUTPUT >> $ERR 707 printf "\n" >> $ERR 708 fi 709 710 # Report any block device change. Ignore 711 # character devices, only the name is 712 # significant. 713 cat $TMP2 $CUR $TMP1 | \ 714 sed -e '/^c/d' | \ 715 sort -k11 | \ 716 sed -e 's/[ ][ ]*/ /g' | \ 717 uniq -u > $OUTPUT 718 if [ -s $OUTPUT ] ; then 719 printf "Block device changes:\n" >> $ERR 720 column -t $OUTPUT >> $ERR 721 printf "\n" >> $ERR 722 fi 723 724 backup_file update $TMP1 $CUR $BACK 725 fi 726 else 727 printf "Device additions:\n" >> $ERR 728 column -t $TMP1 >> $ERR 729 printf "\n" >> $ERR 730 backup_file add $TMP1 $CUR $BACK >> $ERR 731 fi 732 fi 733 if [ -s $ERR ] ; then 734 printf "\nChecking setuid files and devices:\n" 735 cat $ERR 736 printf "\n" 737 fi 738 fi 739 740 # Check special files. 741 # Check system binaries. 742 # 743 # Create the mtree tree specifications using: 744 # mtree -cx -pDIR -kmd5,uid,gid,mode,nlink,size,link,time > DIR.secure 745 # chown root:wheel DIR.secure 746 # chmod u+r,go= DIR.secure 747 # 748 # Note, this is not complete protection against Trojan horsed binaries, as 749 # the hacker can modify the tree specification to match the replaced binary. 750 # For details on really protecting yourself against modified binaries, see 751 # the mtree(8) manual page. 752 # 753 if checkyesno check_mtree; then 754 if checkyesno check_mtree_follow_symlinks; then 755 check_mtree_flags="-L" 756 else 757 check_mtree_flags="" 758 fi 759 for file in $special_files; do 760 [ ! -s $file ] && continue 761 mtree -e -l -p / $check_mtree_flags -f $file 762 done 3>&1 >$OUTPUT 2>&3 | 763 grep -v '^mtree: dev/tty: Device not configured$' >&2 764 if [ -s $OUTPUT ]; then 765 printf "\nChecking special files and directories.\n" 766 cat $OUTPUT 767 fi 768 769 for file in /etc/mtree/*.secure; do 770 [ $file = '/etc/mtree/*.secure' ] && continue 771 tree=`sed -n -e '3s/.* //p' -e 3q $file` 772 mtree $check_mtree_flags -f $file -p $tree > $TMP1 773 if [ -s $TMP1 ]; then 774 printf "\nChecking $tree:\n" 775 cat $TMP1 776 fi 777 done > $OUTPUT 778 if [ -s $OUTPUT ]; then 779 printf "\nChecking system binaries:\n" 780 cat $OUTPUT 781 fi 782 fi 783 784 # Backup disklabels of available disks 785 # 786 if checkyesno check_disklabels; then 787 # migrate old disklabels 788 for file in `ls -1d $backup_dir/$backup_dir/disklabel.* \ 789 $backup_dir/disklabel.* 2>/dev/null`; do 790 migrate_file "$file" "$work_dir/${file##*/}" 791 done 792 793 # generate list of old disklabels & fdisks and remove them 794 ls -1d $work_dir/disklabel.* $work_dir/fdisk.* 2>/dev/null | 795 egrep -v '\.(backup|current)(,v)?$' > $LABELS 796 xargs rm < $LABELS 797 798 # generate disklabels of all disks excluding: cd fd md 799 disks=`iostat -x | awk 'NR > 1 && $1 !~ /^[cfm]d/ { print $1; }'` 800 for i in $disks; do 801 disklabel $i > "$work_dir/disklabel.$i" 2>/dev/null 802 done 803 804 # if fdisk is available, generate fdisks for: ed ld sd wd 805 if [ -x /sbin/fdisk ]; then 806 disks=`iostat -x| awk 'NR > 1 && $1 ~ /^[elsw]d/ { print $1; }'` 807 for i in $disks; do 808 /sbin/fdisk $i > "$work_dir/fdisk.$i" 2>/dev/null 809 done 810 fi 811 812 # append list of new disklabels and fdisks 813 ls -1d $work_dir/disklabel.* $work_dir/fdisk.* 2>/dev/null | 814 egrep -v '\.(backup|current)(,v)?$' >> $LABELS 815 CHANGELIST="$LABELS $CHANGELIST" 816 fi 817 818 # Check for changes in the list of installed pkgs 819 # 820 if checkyesno check_pkgs && [ -d $pkgdb_dir ]; then 821 pkgs=$work_dir/pkgs 822 migrate_file "$backup_dir/pkgs" "$pkgs" 823 ( cd $pkgdb_dir 824 pkg_info | sort 825 echo "" 826 find . \( -name +REQUIRED_BY -o -name +CONTENTS \) -print0 | 827 xargs -0 ls -ldgTq | sort -t. +1 | sed -e 's, \./, ,' 828 ) > $pkgs 829 echo "$pkgs" > $PKGS 830 CHANGELIST="$PKGS $CHANGELIST" 831 fi 832 833 # List of files that get backed up and checked for any modifications. 834 # Any changes cause the files to rotate. 835 # 836 if checkyesno check_changelist ; then 837 for file in $special_files; do 838 [ ! -s $file ] && continue 839 mtree -D -k type -f $file -E exclude | 840 sed '/^type=file/!d ; s/type=file \.//' 841 done > $CHANGEFILES 842 843 ( 844 # Add other files which might dynamically exist: 845 # /etc/ifconfig.* 846 # /etc/raid*.conf 847 # /etc/rc.d/* 848 # /etc/rc.conf.d/* 849 # 850 echo "/etc/ifconfig.*" 851 echo "/etc/raid*.conf" 852 echo "/etc/rc.d/*" 853 echo "/etc/rc.conf.d/*" 854 855 # Add /etc/changelist 856 # 857 if [ -s /etc/changelist ]; then 858 grep -v '^#' /etc/changelist 859 fi 860 ) | while read file; do 861 case "$file" in 862 *[\*\?\[]*) # If changelist line is a glob ... 863 # ... expand possible backup files 864 # 865 ls -1d $(echo $backup_dir/${file}.current) 2>/dev/null \ 866 | sed "s,^$backup_dir/,, ; s,\.current$,," 867 868 # ... expand possible files 869 # 870 ls -1d $(echo $file) 2>/dev/null 871 ;; 872 *) 873 # Otherwise, just print the filename 874 echo $file 875 ;; 876 esac 877 done >> $CHANGEFILES 878 CHANGELIST="$CHANGEFILES $CHANGELIST" 879 fi 880 881 # Special case backups, including the master password file and 882 # ssh private host keys. The normal backup mechanisms for 883 # $check_changelist (see below) also print out the actual file 884 # differences and we don't want to do that for these files 885 # 886 echo $MP > $TMP1 # always add /etc/master.passwd 887 for file in $special_files; do 888 [ ! -s $file ] && continue 889 mtree -D -k type -f $file -I nodiff | 890 sed '/^type=file/!d ; s/type=file \.//' 891 done >> $TMP1 892 grep -v '^$' $TMP1 | sort -u > $TMP2 893 894 while read file; do 895 backup_and_diff "$file" no 896 done < $TMP2 897 898 899 if [ -n "$CHANGELIST" ]; then 900 grep -h -v '^$' $CHANGELIST | sort -u > $TMP1 901 comm -23 $TMP1 $TMP2 | while read file; do 902 backup_and_diff "$file" yes 903 done 904 fi 905 906 if [ -f /etc/security.local ]; then 907 . /etc/security.local > $OUTPUT 2>&1 908 if [ -s $OUTPUT ] ; then 909 printf "\nRunning /etc/security.local:\n" 910 cat $OUTPUT 911 fi 912 fi 913
Indexes created Wed Oct 01 12:09:54 GMT 2025