security revision 1.104
1 #!/bin/sh - 2 # 3 # $NetBSD: security,v 1.104 2007/08/27 19:57:02 adrianp 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 pkg_info=${pkg_info:-/usr/sbin/pkg_info} 32 33 # Other configurable variables 34 # 35 special_files="/etc/mtree/special /etc/mtree/special.local" 36 MP=/etc/master.passwd 37 CHANGELIST="" 38 work_dir=$backup_dir/work 39 40 if [ ! -d "$work_dir" ]; then 41 mkdir -p "$work_dir" 42 fi 43 44 SECUREDIR=$(mktemp -d -t _securedir) || exit 1 45 46 trap "/bin/rm -rf $SECUREDIR ; exit 0" EXIT INT QUIT PIPE 47 48 if ! cd "$SECUREDIR"; then 49 echo "Can not cd to $SECUREDIR". 50 exit 1 51 fi 52 53 ERR=err.$$ 54 TMP1=tmp1.$$ 55 TMP2=tmp2.$$ 56 MPBYUID=mpbyuid.$$ 57 MPBYPATH=mpbypath.$$ 58 LIST=list.$$ 59 OUTPUT=output.$$ 60 LABELS=labels.$$ 61 PKGS=pkgs.$$ 62 CHANGEFILES=changefiles.$$ 63 SPECIALSPEC=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 # 72 migrate_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 # 110 backup_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 # 174 awk -F: '!/^\+/ { print $1 " " $3 }' $MP | sort -k2n > $MPBYUID 175 awk -F: '{ print $1 " " $9 }' $MP | sort -k2 > $MPBYPATH 176 for file in $special_files; do 177 [ -s $file ] && cat $file 178 done | mtree -CM -k all > $SPECIALSPEC || exit 1 179 180 181 # Check the master password file syntax. 182 # 183 if checkyesno check_passwd; then 184 # XXX: the sense of permit_star is reversed; the code works as 185 # implemented, but usage needs to be negated. 186 checkyesno check_passwd_permit_star && permit_star=0 || permit_star=1 187 checkyesno check_passwd_permit_nonalpha \ 188 && permit_nonalpha=1 || permit_nonalpha=0 189 190 awk -v "len=$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 !~ /^\$sha1/ && 240 $2 != "" && 241 (permit_star || $2 != "*") && 242 $2 !~ /^\*[A-z-]+$/ && 243 $1 != "toor") { 244 if ($10 == "" || shells[$10]) 245 printf "Login %s is off but still has "\ 246 "a valid shell (%s)\n", $1, $10; 247 } else if (! shells[$10]) 248 printf "Login %s does not have a valid "\ 249 "shell (%s)\n", $1, $10; 250 } 251 if ($3 == 0 && !uid0_users[$1] && !nowarn_users[$1]) 252 printf "Login %s has a user id of 0.\n", $1; 253 if ($3 < 0) 254 printf "Login %s has a negative user id.\n", $1; 255 if ($4 < 0) 256 printf "Login %s has a negative group id.\n", $1; 257 }' < $MP > $OUTPUT 258 if [ -s $OUTPUT ] ; then 259 printf "\nChecking the $MP file:\n" 260 cat $OUTPUT 261 fi 262 263 awk -F: '{ print $1 }' $MP | sort | uniq -d > $OUTPUT 264 if [ -s $OUTPUT ] ; then 265 printf "\n$MP has duplicate user names.\n" 266 column $OUTPUT 267 fi 268 269 # To not exclude 'toor', a standard duplicate root account, from the duplicate 270 # account test, uncomment the line below (without egrep in it)and comment 271 # out the line (with egrep in it) below it. 272 # 273 # < $MPBYUID uniq -d -f 1 | awk '{ print $2 }' > $TMP2 274 < $MPBYUID egrep -v '^toor ' | uniq -d -f 1 | awk '{ print $2 }' > $TMP2 275 if [ -s $TMP2 ] ; then 276 printf "\n$MP has duplicate user id's.\n" 277 while read uid; do 278 grep -w $uid $MPBYUID 279 done < $TMP2 | column 280 fi 281 fi 282 283 # Check the group file syntax. 284 # 285 if checkyesno check_group; then 286 GRP=/etc/group 287 awk -F: -v "len=$max_grouplen" '{ 288 if ($0 ~ /^[ ]*$/) { 289 printf "Line %d is a blank line.\n", NR; 290 next; 291 } 292 if (NF != 4 && ($1 != "+" || NF != 1)) 293 printf "Line %d has the wrong number of fields.\n", NR; 294 if ($1 == "+" ) { 295 next; 296 } 297 if ($1 !~ /^[_A-Za-z0-9]([-A-Za-z0-9_.]*[A-Za-z0-9])*$/) 298 printf "Group %s has non-alphanumeric characters.\n", 299 $1; 300 if (length($1) > len) 301 printf "Group %s has more than "len" characters.\n", $1; 302 if ($3 !~ /[0-9]*/) 303 printf "Login %s has a negative group id.\n", $1; 304 }' < $GRP > $OUTPUT 305 if [ -s $OUTPUT ] ; then 306 printf "\nChecking the $GRP file:\n" 307 cat $OUTPUT 308 fi 309 310 awk -F: '{ print $1 }' $GRP | sort | uniq -d > $OUTPUT 311 if [ -s $OUTPUT ] ; then 312 printf "\n$GRP has duplicate group names.\n" 313 column $OUTPUT 314 fi 315 fi 316 317 # Check for root paths, umask values in startup files. 318 # The check for the root paths is problematical -- it's likely to fail 319 # in other environments. Once the shells have been modified to warn 320 # of '.' in the path, the path tests should go away. 321 # 322 if checkyesno check_rootdotfiles; then 323 rhome=~root 324 umaskset=no 325 list="/etc/csh.cshrc /etc/csh.login ${rhome}/.cshrc ${rhome}/.login" 326 for i in $list ; do 327 if [ -f $i ] ; then 328 if egrep '^[ \t]*umask[ \t]+[0-7]+' $i > /dev/null ; 329 then 330 umaskset=yes 331 fi 332 # Double check the umask value itself; ensure that 333 # both the group and other write bits are set. 334 # 335 egrep '^[ \t]*umask[ \t]+[0-7]+' $i | 336 awk '{ 337 if ($2 ~ /^.$/ || $2 ~! /[^2367].$/) { 338 print "\tRoot umask is group writable" 339 } 340 if ($2 ~ /[^2367]$/) { 341 print "\tRoot umask is other writable" 342 } 343 }' | sort -u 344 SAVE_PATH=$PATH 345 unset PATH 346 /bin/csh -f -s << end-of-csh > /dev/null 2>&1 347 source $i 348 /bin/ls -ldgT \$path > $TMP1 349 end-of-csh 350 export PATH=$SAVE_PATH 351 awk '{ 352 if ($10 ~ /^\.$/) { 353 print "\tThe root path includes ."; 354 next; 355 } 356 } 357 $1 ~ /^d....w/ \ 358 { print "\tRoot path directory " $10 " is group writable." } \ 359 $1 ~ /^d.......w/ \ 360 { print "\tRoot path directory " $10 " is other writable." }' \ 361 < $TMP1 362 fi 363 done > $OUTPUT 364 if [ $umaskset = "no" -o -s $OUTPUT ] ; then 365 printf "\nChecking root csh paths, umask values:\n$list\n\n" 366 if [ -s $OUTPUT ]; then 367 cat $OUTPUT 368 fi 369 if [ $umaskset = "no" ] ; then 370 printf "\tRoot csh startup files do not set the umask.\n" 371 fi 372 fi 373 374 umaskset=no 375 list="/etc/profile ${rhome}/.profile" 376 for i in $list; do 377 if [ -f $i ] ; then 378 if egrep umask $i > /dev/null ; then 379 umaskset=yes 380 fi 381 egrep umask $i | 382 awk '$2 ~ /^.$/ || $2 ~ /[^2367].$/ \ 383 { print "\tRoot umask is group writable" } \ 384 $2 ~ /[^2367]$/ \ 385 { print "\tRoot umask is other writable" }' 386 SAVE_PATH=$PATH 387 unset PATH 388 /bin/sh << end-of-sh > /dev/null 2>&1 389 . $i 390 list=\`echo \$PATH | /usr/bin/sed -e \ 391 's/^:/.:/;s/:$/:./;s/::/:.:/g;s/:/ /g'\` 392 /bin/ls -ldgT \$list > $TMP1 393 end-of-sh 394 export PATH=$SAVE_PATH 395 awk '{ 396 if ($10 ~ /^\.$/) { 397 print "\tThe root path includes ."; 398 next; 399 } 400 } 401 $1 ~ /^d....w/ \ 402 { print "\tRoot path directory " $10 " is group writable." } \ 403 $1 ~ /^d.......w/ \ 404 { print "\tRoot path directory " $10 " is other writable." }' \ 405 < $TMP1 406 407 fi 408 done > $OUTPUT 409 if [ $umaskset = "no" -o -s $OUTPUT ] ; then 410 printf "\nChecking root sh paths, umask values:\n$list\n" 411 if [ -s $OUTPUT ]; then 412 cat $OUTPUT 413 fi 414 if [ $umaskset = "no" ] ; then 415 printf "\tRoot sh startup files do not set the umask.\n" 416 fi 417 fi 418 fi 419 420 # Root and uucp should both be in /etc/ftpusers. 421 # 422 if checkyesno check_ftpusers; then 423 list="uucp "`awk '$2 == 0 { print $1 }' $MPBYUID` 424 for i in $list; do 425 if /usr/libexec/ftpd -C $i ; then 426 printf "\t$i is not denied\n" 427 fi 428 done > $OUTPUT 429 if [ -s $OUTPUT ]; then 430 printf "\nChecking the /etc/ftpusers configuration:\n" 431 cat $OUTPUT 432 fi 433 fi 434 435 # Uudecode should not be in the /etc/mail/aliases file. 436 # 437 if checkyesno check_aliases; then 438 for f in /etc/mail/aliases /etc/aliases; do 439 if [ -f $f ] && egrep '^[^#]*(uudecode|decode).*\|' $f; then 440 printf "\nEntry for uudecode in $f file.\n" 441 fi 442 done 443 fi 444 445 # Files that should not have + signs. 446 # 447 if checkyesno check_rhosts; then 448 list="/etc/hosts.equiv /etc/hosts.lpd" 449 for f in $list ; do 450 if [ -f $f ] && egrep '\+' $f > /dev/null ; then 451 printf "\nPlus sign in $f file.\n" 452 fi 453 done 454 455 # Check for special users with .rhosts files. Only root and toor should 456 # have .rhosts files. Also, .rhosts files should not have plus signs. 457 awk -F: '$1 != "root" && $1 != "toor" && \ 458 ($3 < 100 || $1 == "ftp" || $1 == "uucp") \ 459 { print $1 " " $9 }' $MP | 460 sort -k2 | 461 while read uid homedir; do 462 if [ -f ${homedir}/.rhosts ] ; then 463 rhost=`ls -ldgT ${homedir}/.rhosts` 464 printf -- "$uid: $rhost\n" 465 fi 466 done > $OUTPUT 467 if [ -s $OUTPUT ] ; then 468 printf "\nChecking for special users with .rhosts files.\n" 469 cat $OUTPUT 470 fi 471 472 while read uid homedir; do 473 if [ -f ${homedir}/.rhosts -a -r ${homedir}/.rhosts ] && \ 474 cat -f ${homedir}/.rhosts | egrep '\+' > /dev/null ; then 475 printf -- "$uid: + in .rhosts file.\n" 476 fi 477 done < $MPBYPATH > $OUTPUT 478 if [ -s $OUTPUT ] ; then 479 printf "\nChecking .rhosts files syntax.\n" 480 cat $OUTPUT 481 fi 482 fi 483 484 # Check home directories. Directories should not be owned by someone else 485 # or writable. 486 # 487 if checkyesno check_homes; then 488 checkyesno check_homes_permit_usergroups && \ 489 permit_usergroups=1 || permit_usergroups=0 490 while read uid homedir; do 491 if [ -d ${homedir}/ ] ; then 492 file=`ls -ldgT ${homedir}` 493 printf -- "$uid $file\n" 494 fi 495 done < $MPBYPATH | 496 awk -v "usergroups=$permit_usergroups" ' 497 $1 != $4 && $4 != "root" \ 498 { print "user " $1 " home directory is owned by " $4 } 499 $2 ~ /^d....w/ && (!usergroups || $5 != $1) \ 500 { print "user " $1 " home directory is group writable" } 501 $2 ~ /^d.......w/ \ 502 { print "user " $1 " home directory is other writable" }' \ 503 > $OUTPUT 504 if [ -s $OUTPUT ] ; then 505 printf "\nChecking home directories.\n" 506 cat $OUTPUT 507 fi 508 509 # Files that should not be owned by someone else or readable. 510 list=".Xauthority .netrc .ssh/id_dsa .ssh/id_rsa .ssh/identity" 511 while read uid homedir; do 512 for f in $list ; do 513 file=${homedir}/${f} 514 if [ -f $file ] ; then 515 printf -- "$uid $f `ls -ldgT $file`\n" 516 fi 517 done 518 done < $MPBYPATH | 519 awk -v "usergroups=$permit_usergroups" ' 520 $1 != $5 && $5 != "root" \ 521 { print "user " $1 " " $2 " file is owned by " $5 } 522 $3 ~ /^-...r/ && (!usergroups || $6 != $1) \ 523 { print "user " $1 " " $2 " file is group readable" } 524 $3 ~ /^-......r/ \ 525 { print "user " $1 " " $2 " file is other readable" } 526 $3 ~ /^-....w/ && (!usergroups || $6 != $1) \ 527 { print "user " $1 " " $2 " file is group writable" } 528 $3 ~ /^-.......w/ \ 529 { print "user " $1 " " $2 " file is other writable" }' \ 530 > $OUTPUT 531 532 # Files that should not be owned by someone else or writable. 533 list=".bash_history .bash_login .bash_logout .bash_profile .bashrc \ 534 .cshrc .emacs .exrc .forward .history .k5login .klogin .login \ 535 .logout .profile .qmail .rc_history .rhosts .shosts ssh .tcshrc \ 536 .twmrc .xinitrc .xsession .ssh/authorized_keys \ 537 .ssh/authorized_keys2 .ssh/config .ssh/id_dsa.pub \ 538 .ssh/id_rsa.pub .ssh/identity.pub .ssh/known_hosts \ 539 .ssh/known_hosts2" 540 while read uid homedir; do 541 for f in $list ; do 542 file=${homedir}/${f} 543 if [ -f $file ] ; then 544 printf -- "$uid $f `ls -ldgT $file`\n" 545 fi 546 done 547 done < $MPBYPATH | 548 awk -v "usergroups=$permit_usergroups" ' 549 $1 != $5 && $5 != "root" \ 550 { print "user " $1 " " $2 " file is owned by " $5 } 551 $3 ~ /^-....w/ && (!usergroups || $6 != $1) \ 552 { print "user " $1 " " $2 " file is group writable" } 553 $3 ~ /^-.......w/ \ 554 { print "user " $1 " " $2 " file is other writable" }' \ 555 >> $OUTPUT 556 if [ -s $OUTPUT ] ; then 557 printf "\nChecking dot files.\n" 558 cat $OUTPUT 559 fi 560 fi 561 562 # Mailboxes should be owned by user and unreadable. 563 # 564 if checkyesno check_varmail; then 565 ls -lA /var/mail | \ 566 awk ' NR == 1 { next; } 567 $9 ~ /^\./ {next; } 568 $3 != $9 { 569 print "user " $9 " mailbox is owned by " $3 570 } 571 $1 != "-rw-------" { 572 print "user " $9 " mailbox is " $1 ", group " $4 573 }' > $OUTPUT 574 if [ -s $OUTPUT ] ; then 575 printf "\nChecking mailbox ownership.\n" 576 cat $OUTPUT 577 fi 578 fi 579 580 # NFS exports shouldn't be globally exported 581 # 582 if checkyesno check_nfs && [ -f /etc/exports ]; then 583 awk '{ 584 # ignore comments and blank lines 585 if ($0 ~ /^\#/ || $0 ~ /^$/ ) 586 next; 587 # manage line continuation 588 while ($NF ~ /^\\$/) { 589 $NF = ""; 590 line = $0 ""; 591 getline; 592 $0 = line $0 ""; 593 } 594 595 delete dir; 596 readonly = ndir = 0; 597 for (i = 1; i <= NF; ++i) { 598 if ($i ~ /^\//) dir[ndir++] = $i; 599 else if ($i ~ /^-/) { 600 if ($i ~ /^-(ro|o)$/) readonly = 1; 601 if ($i ~ /^-network/) next; 602 } 603 else next; 604 } 605 if (readonly) 606 for (item in dir) 607 rodir[nrodir++] = dir[item]; 608 else 609 for (item in dir) 610 rwdir[nrwdir++] = dir[item]; 611 612 } 613 614 END { 615 if (nrodir) { 616 printf("Globally exported file system%s, read-only:\n", 617 nrodir > 1 ? "s" : ""); 618 for (item in rodir) 619 printf("\t%s\n", rodir[item]); 620 } 621 if (nrwdir) { 622 printf("Globally exported file system%s, read-write:\n", 623 nrwdir > 1 ? "s" : ""); 624 for (item in rwdir) 625 printf("\t%s\n", rwdir[item]); 626 } 627 }' < /etc/exports > $OUTPUT 628 if [ -s $OUTPUT ] ; then 629 printf "\nChecking for globally exported file systems.\n" 630 cat $OUTPUT 631 fi 632 fi 633 634 # Display any changes in setuid files and devices. 635 # 636 if checkyesno check_devices; then 637 > $ERR 638 ( 639 640 # Convert check_devices_ignore_fstypes="foo !bar bax" 641 # into "-fstype foo -o ! -fstype bar -o -fstype bax" 642 # and check_devices_ignore_paths="/foo !/bar /bax" 643 # into " -path /foo -o ! -path /bar -o -path /bax" 644 # 645 ignexpr=$(\ 646 echo $check_devices_ignore_fstypes | \ 647 sed -e's/\(!*\)\([^[:space:]]\{1,\}\)/-o \1 -fstype \2/g' ; \ 648 echo $check_devices_ignore_paths | \ 649 sed -e's/\(!*\)\([^[:space:]]\{1,\}\)/-o \1 -path \2/g' \ 650 ) 651 652 # Massage the expression into ( $ignexpr ) -a -prune -o 653 if [ -n "${ignexpr}" ]; then 654 ignexpr=$(\ 655 echo $ignexpr | \ 656 sed -e 's/^-o /( /' \ 657 -e 's/$/ ) -a -prune -o/' \ 658 ) 659 fi 660 661 find / $ignexpr \ 662 \( \( -perm -u+s -a ! -type d \) -o \ 663 \( -perm -g+s -a ! -type d \) -o \ 664 -type b -o -type c \) -print0 | \ 665 xargs -0 ls -ldgTq | sort +9 > $LIST 666 667 ) 2> $OUTPUT 668 669 # Display any errors that occurred during system file walk. 670 if [ -s $OUTPUT ] ; then 671 printf "Setuid/device find errors:\n" >> $ERR 672 cat $OUTPUT >> $ERR 673 printf "\n" >> $ERR 674 fi 675 676 # Display any changes in the setuid file list. 677 egrep -v '^[bc]' $LIST > $TMP1 678 if [ -s $TMP1 ] ; then 679 # Check to make sure uudecode isn't setuid. 680 if grep -w uudecode $TMP1 > /dev/null ; then 681 printf "\nUudecode is setuid.\n" >> $ERR 682 fi 683 684 file=$work_dir/setuid 685 migrate_file "$backup_dir/setuid" "$file" 686 CUR=${file}.current 687 BACK=${file}.backup 688 if [ -s $CUR ] ; then 689 if cmp -s $CUR $TMP1 ; then 690 : 691 else 692 > $TMP2 693 join -110 -210 -v2 $CUR $TMP1 > $OUTPUT 694 if [ -s $OUTPUT ] ; then 695 printf "Setuid additions:\n" >> $ERR 696 tee -a $TMP2 < $OUTPUT >> $ERR 697 printf "\n" >> $ERR 698 fi 699 700 join -110 -210 -v1 $CUR $TMP1 > $OUTPUT 701 if [ -s $OUTPUT ] ; then 702 printf "Setuid deletions:\n" >> $ERR 703 tee -a $TMP2 < $OUTPUT >> $ERR 704 printf "\n" >> $ERR 705 fi 706 707 sort -k10 $TMP2 $CUR $TMP1 | \ 708 sed -e 's/[ ][ ]*/ /g' | \ 709 uniq -u > $OUTPUT 710 if [ -s $OUTPUT ] ; then 711 printf "Setuid changes:\n" >> $ERR 712 column -t $OUTPUT >> $ERR 713 printf "\n" >> $ERR 714 fi 715 716 backup_file update $TMP1 $CUR $BACK 717 fi 718 else 719 printf "Setuid additions:\n" >> $ERR 720 column -t $TMP1 >> $ERR 721 printf "\n" >> $ERR 722 backup_file add $TMP1 $CUR $BACK 723 fi 724 fi 725 726 # Check for block and character disk devices that are readable or 727 # writable or not owned by root.operator. 728 >$TMP1 729 DISKLIST="ccd ch hk hp ld md ra raid rb rd rl rx \ 730 sd se ss uk up vnd wd xd xy" 731 # DISKLIST="$DISKLIST ct mt st wt" 732 for i in $DISKLIST; do 733 egrep "^b.*/${i}[0-9][0-9]*[a-p]$" $LIST >> $TMP1 734 egrep "^c.*/r${i}[0-9][0-9]*[a-p]$" $LIST >> $TMP1 735 done 736 737 awk '$3 != "root" || $4 != "operator" || $1 !~ /.rw-r-----/ \ 738 { printf "Disk %s is user %s, group %s, permissions %s.\n", \ 739 $11, $3, $4, $1; }' < $TMP1 > $OUTPUT 740 if [ -s $OUTPUT ] ; then 741 printf "\nChecking disk ownership and permissions.\n" >> $ERR 742 cat $OUTPUT >> $ERR 743 printf "\n" >> $ERR 744 fi 745 746 # Display any changes in the device file list. 747 egrep '^[bc]' $LIST | sort -k11 > $TMP1 748 if [ -s $TMP1 ] ; then 749 file=$work_dir/device 750 migrate_file "$backup_dir/device" "$file" 751 CUR=${file}.current 752 BACK=${file}.backup 753 754 if [ -s $CUR ] ; then 755 if cmp -s $CUR $TMP1 ; then 756 : 757 else 758 > $TMP2 759 join -111 -211 -v2 $CUR $TMP1 > $OUTPUT 760 if [ -s $OUTPUT ] ; then 761 printf "Device additions:\n" >> $ERR 762 tee -a $TMP2 < $OUTPUT >> $ERR 763 printf "\n" >> $ERR 764 fi 765 766 join -111 -211 -v1 $CUR $TMP1 > $OUTPUT 767 if [ -s $OUTPUT ] ; then 768 printf "Device deletions:\n" >> $ERR 769 tee -a $TMP2 < $OUTPUT >> $ERR 770 printf "\n" >> $ERR 771 fi 772 773 # Report any block device change. Ignore 774 # character devices, only the name is 775 # significant. 776 cat $TMP2 $CUR $TMP1 | \ 777 sed -e '/^c/d' | \ 778 sort -k11 | \ 779 sed -e 's/[ ][ ]*/ /g' | \ 780 uniq -u > $OUTPUT 781 if [ -s $OUTPUT ] ; then 782 printf "Block device changes:\n" >> $ERR 783 column -t $OUTPUT >> $ERR 784 printf "\n" >> $ERR 785 fi 786 787 backup_file update $TMP1 $CUR $BACK 788 fi 789 else 790 printf "Device additions:\n" >> $ERR 791 column -t $TMP1 >> $ERR 792 printf "\n" >> $ERR 793 backup_file add $TMP1 $CUR $BACK >> $ERR 794 fi 795 fi 796 if [ -s $ERR ] ; then 797 printf "\nChecking setuid files and devices:\n" 798 cat $ERR 799 printf "\n" 800 fi 801 fi 802 803 # Check special files. 804 # Check system binaries. 805 # 806 # Create the mtree tree specifications using: 807 # mtree -cx -pDIR -kmd5,uid,gid,mode,nlink,size,link,time > DIR.secure 808 # chown root:wheel DIR.secure 809 # chmod u+r,go= DIR.secure 810 # 811 # Note, this is not complete protection against Trojan horsed binaries, as 812 # the hacker can modify the tree specification to match the replaced binary. 813 # For details on really protecting yourself against modified binaries, see 814 # the mtree(8) manual page. 815 # 816 if checkyesno check_mtree; then 817 if checkyesno check_mtree_follow_symlinks; then 818 check_mtree_flags="-L" 819 else 820 check_mtree_flags="" 821 fi 822 mtree -e -l -p / $check_mtree_flags -f $SPECIALSPEC 3>&1 >$OUTPUT 2>&3 | 823 grep -v '^mtree: dev/tty: Device not configured$' >&2 824 if [ -s $OUTPUT ]; then 825 printf "\nChecking special files and directories.\n" 826 cat $OUTPUT 827 fi 828 829 for file in /etc/mtree/*.secure; do 830 [ $file = '/etc/mtree/*.secure' ] && continue 831 tree=`sed -n -e '3s/.* //p' -e 3q $file` 832 mtree $check_mtree_flags -f $file -p $tree > $TMP1 833 if [ -s $TMP1 ]; then 834 printf "\nChecking $tree:\n" 835 cat $TMP1 836 fi 837 done > $OUTPUT 838 if [ -s $OUTPUT ]; then 839 printf "\nChecking system binaries:\n" 840 cat $OUTPUT 841 fi 842 fi 843 844 # Backup disklabels of available disks 845 # 846 if checkyesno check_disklabels; then 847 # migrate old disklabels 848 for file in `ls -1d $backup_dir/$backup_dir/disklabel.* \ 849 $backup_dir/disklabel.* 2>/dev/null`; do 850 migrate_file "$file" "$work_dir/${file##*/}" 851 done 852 853 # generate list of old disklabels, fdisks & wedges and remove them 854 ls -1d $work_dir/disklabel.* $work_dir/fdisk.* $work_dir/wedges.* 2>/dev/null | 855 egrep -v '\.(backup|current)(,v)?$' > $LABELS 856 xargs rm < $LABELS 857 858 # generate disklabels of all disks excluding: cd dk fd md st 859 disks=`iostat -x | awk 'NR > 1 && $1 !~ /^[cfm]d|dk|st|nfs/ { print $1; }'` 860 for i in $disks; do 861 disklabel $i > "$work_dir/disklabel.$i" 2>/dev/null 862 done 863 864 # if fdisk is available, generate fdisks for: ed ld sd wd 865 if [ -x /sbin/fdisk ]; then 866 disks=`iostat -x| awk 'NR > 1 && $1 ~ /^[elsw]d/ { print $1; }'` 867 for i in $disks; do 868 /sbin/fdisk $i > "$work_dir/fdisk.$i" 2>/dev/null 869 done 870 fi 871 872 # if dkctl is available, generate dkctl listwedges for: ed ld sd wd cgd ofdisk ra rl raid 873 if [ -x /sbin/dkctl ]; then 874 disks=`iostat -x| awk 'NR > 1 && $1 ~ /^[elsw]d|cgd|ofdisk|r[al]|raid/ { print $1; }'` 875 for i in $disks; do 876 /sbin/dkctl $i listwedges > "$work_dir/wedges.$i" 2>/dev/null 877 done 878 fi 879 880 # append list of new disklabels, fdisks and wedges 881 ls -1d $work_dir/disklabel.* $work_dir/fdisk.* $work_dir/wedges.* 2>/dev/null | 882 egrep -v '\.(backup|current)(,v)?$' >> $LABELS 883 CHANGELIST="$LABELS $CHANGELIST" 884 fi 885 886 # Check for changes in the list of installed pkgs 887 # 888 if checkyesno check_pkgs && [ -d $pkgdb_dir ]; then 889 pkgs=$work_dir/pkgs 890 migrate_file "$backup_dir/pkgs" "$pkgs" 891 ( cd $pkgdb_dir 892 $pkg_info | sort 893 echo "" 894 find . \( -name +REQUIRED_BY -o -name +CONTENTS \) -print0 | 895 xargs -0 ls -ldgTq | sort -t. +1 | sed -e 's, \./, ,' 896 ) > $pkgs 897 echo "$pkgs" > $PKGS 898 CHANGELIST="$PKGS $CHANGELIST" 899 fi 900 901 # List of files that get backed up and checked for any modifications. 902 # Any changes cause the files to rotate. 903 # 904 if checkyesno check_changelist ; then 905 mtree -D -k type -f $SPECIALSPEC -E exclude | 906 sed '/^type=file/!d ; s/type=file \.//' | unvis > $CHANGEFILES 907 908 ( 909 # Add other files which might dynamically exist: 910 # /etc/ifconfig.* 911 # /etc/raid*.conf 912 # /etc/rc.d/* 913 # /etc/rc.conf.d/* 914 # 915 echo "/etc/ifconfig.*" 916 echo "/etc/raid*.conf" 917 echo "/etc/rc.d/*" 918 echo "/etc/rc.conf.d/*" 919 920 # Add /etc/changelist 921 # 922 if [ -s /etc/changelist ]; then 923 grep -v '^#' /etc/changelist 924 fi 925 ) | while read file; do 926 case "$file" in 927 *[\*\?\[]*) # If changelist line is a glob ... 928 # ... expand possible backup files 929 # 930 ls -1d $(echo $backup_dir/${file}.current) 2>/dev/null \ 931 | sed "s,^$backup_dir/,, ; s,\.current$,," 932 933 # ... expand possible files 934 # 935 ls -1d $(echo $file) 2>/dev/null 936 ;; 937 *) 938 # Otherwise, just print the filename 939 echo $file 940 ;; 941 esac 942 done >> $CHANGEFILES 943 CHANGELIST="$CHANGEFILES $CHANGELIST" 944 fi 945 946 # Special case backups, including the master password file and 947 # ssh private host keys. The normal backup mechanisms for 948 # $check_changelist (see below) also print out the actual file 949 # differences and we don't want to do that for these files 950 # 951 echo $MP > $TMP1 # always add /etc/master.passwd 952 mtree -D -k type -f $SPECIALSPEC -I nodiff | 953 sed '/^type=file/!d ; s/type=file \.//' | unvis >> $TMP1 954 grep -v '^$' $TMP1 | sort -u > $TMP2 955 956 while read file; do 957 backup_and_diff "$file" no 958 done < $TMP2 959 960 961 if [ -n "$CHANGELIST" ]; then 962 grep -h -v '^$' $CHANGELIST | sort -u > $TMP1 963 comm -23 $TMP1 $TMP2 | while read file; do 964 backup_and_diff "$file" yes 965 done 966 fi 967 968 if [ -f /etc/security.local ]; then 969 . /etc/security.local > $OUTPUT 2>&1 970 if [ -s $OUTPUT ] ; then 971 printf "\nRunning /etc/security.local:\n" 972 cat $OUTPUT 973 fi 974 fi 975
Indexes created Wed Oct 01 13:09:50 GMT 2025