Annotation of src/etc/security, Revision 1.85
1.1 deraadt 1: #
1.85 ! schwarze 2: # $OpenBSD: security,v 1.84 2009/05/14 21:24:33 schwarze Exp $
1.13 millert 3: # from: @(#)security 8.1 (Berkeley) 6/9/93
1.1 deraadt 4: #
1.13 millert 5:
1.55 millert 6: PATH=/bin:/usr/bin:/sbin:/usr/sbin
1.1 deraadt 7:
8: umask 077
9:
1.60 avsm 10: DIR=`mktemp -d /tmp/_secure.XXXXXXXXXX` || exit 1
1.7 deraadt 11: TMP1=$DIR/_secure2
12: TMP2=$DIR/_secure3
13: LIST=$DIR/_secure5
1.8 deraadt 14:
1.25 deraadt 15: trap 'rm -rf $DIR; exit 1' 0 1 2 3 13 15
1.1 deraadt 16:
17: # Check the master password file syntax.
18: MP=/etc/master.passwd
1.84 schwarze 19: next_part "Checking the ${MP} file:"
1.1 deraadt 20: awk -F: '{
21: if ($0 ~ /^[ ]*$/) {
22: printf("Line %d is a blank line.\n", NR);
23: next;
24: }
25: if (NF != 10)
1.32 espie 26: printf("Line %d has the wrong number of fields:\n%s\n", NR, $0);
1.15 millert 27: if ($1 ~ /^[+-]/)
1.2 deraadt 28: next;
29: if ($1 == "")
1.32 espie 30: printf("Line %d has an empty login field:\n%s\n", NR, $0);
1.59 grange 31: else if ($1 !~ /^[A-Za-z0-9_][A-Za-z0-9_\-\.]*\$?$/)
1.1 deraadt 32: printf("Login %s has non-alphanumeric characters.\n", $1);
1.48 brad 33: if (length($1) > 31)
34: printf("Login %s has more than 31 characters.\n", $1);
1.1 deraadt 35: if ($2 == "")
36: printf("Login %s has no password.\n", $1);
1.23 deraadt 37: if ($2 != "" && length($2) != 13 && ($10 ~ /.*sh$/ || $10 == "") &&
1.70 david 38: ($2 !~ /^\$[0-9a-f]+\$/) && ($2 != "skey")) {
1.51 millert 39: if (system("test -s /etc/skey/"$1"") == 0)
40: printf("Login %s is off but still has a valid shell and an entry in /etc/skey.\n", $1);
1.23 deraadt 41: if (system("test -d "$9" -a ! -r "$9"") == 0)
1.40 hugh 42: printf("Login %s is off but still has valid shell and home directory is unreadable\n\t by root; cannot check for existence of alternate access files.\n", $1);
1.23 deraadt 43: else if (system("for file in .ssh .rhosts .shosts .klogin; do if test -e "$9"/$file; then if ((ls -ld "$9"/$file | cut -b 2-10 | grep -q r) && (test ! -O "$9"/$file)) ; then exit 1; fi; fi; done"))
44: printf("Login %s is off but still has a valid shell and alternate access files in\n\t home directory are still readable.\n",$1);
45: }
1.9 deraadt 46: if ($3 == 0 && $1 != "root")
1.36 aaron 47: printf("Login %s has a user ID of 0.\n", $1);
1.1 deraadt 48: if ($3 < 0)
1.36 aaron 49: printf("Login %s has a negative user ID.\n", $1);
1.1 deraadt 50: if ($4 < 0)
1.36 aaron 51: printf("Login %s has a negative group ID.\n", $1);
1.64 millert 52: if (int($7) != 0 && system("test "$7" -lt `date +%s`") == 0)
1.53 pvalchev 53: printf("Login %s has expired.\n", $1);
1.84 schwarze 54: }' < $MP
1.1 deraadt 55:
1.84 schwarze 56: next_part "${MP} has duplicate user names."
57: awk -F: '{ print $1 }' $MP | sort | uniq -d | column
1.1 deraadt 58:
1.84 schwarze 59: next_part "${MP} has duplicate user IDs."
1.47 millert 60: awk -F: '/^[^\+]/ { print $1 " " $3 }' $MP | sort -n +1 | tee $TMP1 |
1.1 deraadt 61: uniq -d -f 1 | awk '{ print $2 }' > $TMP2
62: if [ -s $TMP2 ] ; then
1.70 david 63: while read uid; do
64: grep -w $uid $TMP1
65: done < $TMP2 | column
1.1 deraadt 66: fi
67:
68: # Backup the master password file; a special case, the normal backup
69: # mechanisms also print out file differences and we don't want to do
70: # that because this file has encrypted passwords in it.
1.2 deraadt 71: if [ ! -d /var/backups ] ; then
72: mkdir /var/backups
1.31 deraadt 73: chmod 700 /var/backups
1.2 deraadt 74: fi
1.1 deraadt 75: CUR=/var/backups/`basename $MP`.current
76: BACK=/var/backups/`basename $MP`.backup
77: if [ -s $CUR ] ; then
78: if cmp -s $CUR $MP; then
79: :
80: else
81: cp -p $CUR $BACK
82: cp -p $MP $CUR
1.56 millert 83: chown root:wheel $CUR
1.1 deraadt 84: fi
85: else
86: cp -p $MP $CUR
1.56 millert 87: chown root:wheel $CUR
1.1 deraadt 88: fi
89:
90: # Check the group file syntax.
91: GRP=/etc/group
1.84 schwarze 92: next_part "Checking the ${GRP} file:"
1.1 deraadt 93: awk -F: '{
94: if ($0 ~ /^[ ]*$/) {
95: printf("Line %d is a blank line.\n", NR);
96: next;
97: }
1.2 deraadt 98: if ($1 ~ /^[+-].*$/)
99: next;
1.1 deraadt 100: if (NF != 4)
1.32 espie 101: printf("Line %d has the wrong number of fields:\n%s\n", NR, $0);
1.65 sturm 102: if ($1 !~ /^[A-Za-z0-9_][A-Za-z0-9_\-\.]*$/)
1.1 deraadt 103: printf("Group %s has non-alphanumeric characters.\n", $1);
1.48 brad 104: if (length($1) > 31)
105: printf("Group %s has more than 31 characters.\n", $1);
1.83 schwarze 106: if ($3 !~ /^[0-9]*$/)
107: printf("Group %s has an invalid group ID.\n", $1);
1.84 schwarze 108: }' < $GRP
1.1 deraadt 109:
1.84 schwarze 110: next_part "${GRP} has duplicate group names."
111: awk -F: '{ print $1 }' $GRP | sort | uniq -d | column
1.1 deraadt 112:
113: # Check for root paths, umask values in startup files.
114: # The check for the root paths is problematical -- it's likely to fail
115: # in other environments. Once the shells have been modified to warn
116: # of '.' in the path, the path tests should go away.
117: rhome=/root
118: umaskset=no
119: list="/etc/csh.cshrc /etc/csh.login ${rhome}/.cshrc ${rhome}/.login"
1.84 schwarze 120: next_part "Checking root csh paths, umask values:\n${list}"
1.1 deraadt 121: for i in $list ; do
1.15 millert 122: if [ -s $i ] ; then
1.75 david 123: if egrep -aq '[[:space:]]*umask[[:space:]]' $i ; then
1.63 millert 124: umaskset=yes
125: fi
1.61 millert 126: awk '{
127: if ($1 == "umask") {
1.62 millert 128: if ($2 % 100 / 10 ~ /^[0145]/)
1.61 millert 129: print "Root umask is group writable";
130: if ($2 % 10 ~ /^[0145]/)
131: print "Root umask is other writable";
132: }
1.84 schwarze 133: }' < $i
1.21 deraadt 134: SAVE_PATH=$PATH
135: unset PATH
1.1 deraadt 136: /bin/csh -f -s << end-of-csh > /dev/null 2>&1
137: source $i
1.29 marc 138: if (\$?path) then
139: /bin/ls -ldgT \$path > $TMP1
140: else
141: cat /dev/null > $TMP1
142: endif
1.1 deraadt 143: end-of-csh
1.21 deraadt 144: PATH=$SAVE_PATH
1.1 deraadt 145: awk '{
146: if ($10 ~ /^\.$/) {
147: print "The root path includes .";
148: next;
149: }
150: }
151: $1 ~ /^d....w/ \
1.70 david 152: { print "Root path directory " $10 " is group writable." } \
1.1 deraadt 153: $1 ~ /^d.......w/ \
1.70 david 154: { print "Root path directory " $10 " is other writable." }' \
1.84 schwarze 155: < $TMP1
1.1 deraadt 156: fi
157: done
1.84 schwarze 158: if [ $umaskset = "no" ] ; then
159: echo "\nRoot csh startup files do not set the umask."
1.1 deraadt 160: fi
161:
1.29 marc 162: > $TMP2
1.1 deraadt 163: rhome=/root
164: umaskset=no
1.20 millert 165: list="/etc/profile ${rhome}/.profile"
1.84 schwarze 166: next_part "Checking root sh paths, umask values:\n${list}"
1.1 deraadt 167: for i in $list; do
1.15 millert 168: if [ -s $i ] ; then
1.75 david 169: if egrep -a umask $i > /dev/null ; then
1.1 deraadt 170: umaskset=yes
171: fi
1.75 david 172: egrep -a umask $i |
1.1 deraadt 173: awk '$2 % 100 < 20 \
1.54 henning 174: { print "Root umask is group writable" } \
1.1 deraadt 175: $2 % 10 < 2 \
1.84 schwarze 176: { print "Root umask is other writable" }'
1.21 deraadt 177: SAVE_PATH=$PATH
1.29 marc 178: SAVE_ENV=$ENV
179: unset PATH ENV
1.1 deraadt 180: /bin/sh << end-of-sh > /dev/null 2>&1
181: . $i
1.29 marc 182: if [ X"\$PATH" != "X" ]; then
183: list=\`echo \$PATH | /usr/bin/sed -e 's/:/ /g'\`
184: /bin/ls -ldgT \$list > $TMP1
185: else
186: > $TMP1
187: fi
188: echo \$ENV >> $TMP2
1.1 deraadt 189: end-of-sh
1.21 deraadt 190: PATH=$SAVE_PATH
1.29 marc 191: ENV=$SAVE_ENV
1.1 deraadt 192: awk '{
193: if ($10 ~ /^\.$/) {
194: print "The root path includes .";
195: next;
196: }
197: }
198: $1 ~ /^d....w/ \
1.70 david 199: { print "Root path directory " $10 " is group writable." } \
1.1 deraadt 200: $1 ~ /^d.......w/ \
1.70 david 201: { print "Root path directory " $10 " is other writable." }' \
1.84 schwarze 202: < $TMP1
1.1 deraadt 203:
204: fi
205: done
1.84 schwarze 206: if [ $umaskset = "no" ] ; then
207: echo "\nRoot sh startup files do not set the umask."
1.1 deraadt 208: fi
209:
1.27 marc 210: # A good .kshrc will not have a umask or path, that being set in .profile
211: # check anyway.
212: rhome=/root
1.29 marc 213: list="/etc/ksh.kshrc `cat $TMP2`"
1.84 schwarze 214: next_part "Checking root ksh paths, umask values:\n${list}"
1.29 marc 215: (cd $rhome
216: for i in $list; do
1.27 marc 217: if [ -s $i ] ; then
1.75 david 218: egrep -a umask $i |
1.27 marc 219: awk '$2 % 100 < 20 \
1.54 henning 220: { print "Root umask is group writable" } \
1.27 marc 221: $2 % 10 < 2 \
1.84 schwarze 222: { print "Root umask is other writable" }'
1.75 david 223: if egrep -a PATH= $i > /dev/null ; then
1.27 marc 224: SAVE_PATH=$PATH
225: unset PATH
226: /bin/ksh << end-of-sh > /dev/null 2>&1
227: . $i
1.29 marc 228: if [ X"\$PATH" != "X" ]; then
229: list=\`echo \$PATH | /usr/bin/sed -e 's/:/ /g'\`
230: /bin/ls -ldgT \$list > $TMP1
231: else
232: > $TMP1
233: fi
1.27 marc 234: end-of-sh
235: PATH=$SAVE_PATH
236: awk '{
237: if ($10 ~ /^\.$/) {
238: print "The root path includes .";
239: next;
240: }
241: }
242: $1 ~ /^d....w/ \
1.54 henning 243: { print "Root path directory " $10 " is group writable." } \
1.27 marc 244: $1 ~ /^d.......w/ \
1.54 henning 245: { print "Root path directory " $10 " is other writable." }' \
1.84 schwarze 246: < $TMP1
1.27 marc 247: fi
248:
249: fi
1.29 marc 250: done
251: )
1.27 marc 252:
1.84 schwarze 253: next_part "Checking configuration files:"
1.1 deraadt 254: # Root and uucp should both be in /etc/ftpusers.
255: if egrep root /etc/ftpusers > /dev/null ; then
256: :
257: else
1.84 schwarze 258: echo "Root not listed in /etc/ftpusers file."
1.1 deraadt 259: fi
260: if egrep uucp /etc/ftpusers > /dev/null ; then
261: :
262: else
1.84 schwarze 263: echo "Uucp not listed in /etc/ftpusers file."
1.1 deraadt 264: fi
265:
1.35 millert 266: # Uudecode should not be in the /etc/mail/aliases file.
267: if egrep 'uudecode|decode' /etc/mail/aliases; then
1.84 schwarze 268: echo "There is an entry for uudecode in the /etc/mail/aliases file."
1.1 deraadt 269: fi
1.80 sthen 270:
271: # hostname.if files may contain secrets and should not be
272: # world-readable.
273:
274: for f in /etc/hostname.* ; do
1.81 sthen 275: if [ ! -e $f ]; then
276: continue
277: fi
278: if [ "$(stat -Lf "%SLp" $f)" != "---" ]; then
1.84 schwarze 279: echo "$f is world readable."
1.80 sthen 280: fi
281: done
1.1 deraadt 282:
283: # Files that should not have + signs.
1.2 deraadt 284: list="/etc/hosts.equiv /etc/shosts.equiv /etc/hosts.lpd"
1.1 deraadt 285: for f in $list ; do
1.6 millert 286: if [ -s $f ] ; then
1.2 deraadt 287: awk '{
1.13 millert 288: if ($0 ~ /^\+@.*$/)
1.2 deraadt 289: next;
1.13 millert 290: if ($0 ~ /^\+.*$/)
1.84 schwarze 291: printf("Plus sign in %s file.\n", FILENAME);
1.2 deraadt 292: }' $f
1.1 deraadt 293: fi
294: done
295:
1.13 millert 296: # Check for special users with .rhosts/.shosts files. Only root
297: # should have .rhosts/.shosts files. Also, .rhosts/.shosts
298: # files should not have plus signs.
1.84 schwarze 299: next_part "Checking for special users with .rhosts/.shosts files."
1.14 millert 300: awk -F: '$1 != "root" && $1 !~ /^[+-]/ && \
1.1 deraadt 301: ($3 < 100 || $1 == "ftp" || $1 == "uucp") \
302: { print $1 " " $6 }' /etc/passwd |
303: while read uid homedir; do
1.2 deraadt 304: for j in .rhosts .shosts; do
1.14 millert 305: # Root owned .rhosts/.shosts files are ok.
1.15 millert 306: if [ -s ${homedir}/$j -a ! -O ${homedir}/$j ] ; then
1.2 deraadt 307: rhost=`ls -ldgT ${homedir}/$j`
1.41 millert 308: echo "${uid}: ${rhost}"
1.2 deraadt 309: fi
310: done
1.84 schwarze 311: done
1.1 deraadt 312:
1.84 schwarze 313: next_part "Checking .rhosts/.shosts files syntax."
1.14 millert 314: awk -F: '/^[^+-]/ { print $1 " " $6 }' /etc/passwd | \
1.1 deraadt 315: while read uid homedir; do
1.2 deraadt 316: for j in .rhosts .shosts; do
1.13 millert 317: if [ -s ${homedir}/$j ] ; then
1.2 deraadt 318: awk '{
319: if ($0 ~ /^+@.*$/ )
320: next;
1.4 deraadt 321: if ($0 ~ /^\+[ ]*$/ )
1.2 deraadt 322: printf("%s has + sign in it.\n",
1.13 millert 323: FILENAME);
1.2 deraadt 324: }' ${homedir}/$j
325: fi
326: done
1.84 schwarze 327: done
1.1 deraadt 328:
329: # Check home directories. Directories should not be owned by someone else
330: # or writeable.
1.84 schwarze 331: next_part "Checking home directories."
1.14 millert 332: awk -F: '/^[^+-]/ { print $1 " " $6 }' /etc/passwd | \
1.1 deraadt 333: while read uid homedir; do
334: if [ -d ${homedir}/ ] ; then
335: file=`ls -ldgT ${homedir}`
1.41 millert 336: echo "${uid} ${file}"
1.1 deraadt 337: fi
338: done |
339: awk '$1 != $4 && $4 != "root" \
340: { print "user " $1 " home directory is owned by " $4 }
341: $2 ~ /^-....w/ \
1.54 henning 342: { print "user " $1 " home directory is group writable" }
1.1 deraadt 343: $2 ~ /^-.......w/ \
1.84 schwarze 344: { print "user " $1 " home directory is other writable" }'
1.1 deraadt 345:
346: # Files that should not be owned by someone else or readable.
1.43 todd 347: list=".netrc .rhosts .gnupg/secring.gpg .gnupg/random_seed \
1.45 millert 348: .pgp/secring.pgp .shosts .ssh/identity .ssh/id_dsa .ssh/id_rsa"
1.84 schwarze 349: next_part "Checking dot files."
1.14 millert 350: awk -F: '/^[^+-]/ { print $1 " " $6 }' /etc/passwd | \
1.1 deraadt 351: while read uid homedir; do
352: for f in $list ; do
353: file=${homedir}/${f}
354: if [ -f $file ] ; then
1.41 millert 355: echo "${uid} ${f} `ls -ldgT ${file}`"
1.1 deraadt 356: fi
357: done
358: done |
359: awk '$1 != $5 && $5 != "root" \
360: { print "user " $1 " " $2 " file is owned by " $5 }
1.13 millert 361: $3 ~ /^-...r/ \
362: { print "user " $1 " " $2 " file is group readable" }
1.1 deraadt 363: $3 ~ /^-......r/ \
364: { print "user " $1 " " $2 " file is other readable" }
365: $3 ~ /^-....w/ \
1.54 henning 366: { print "user " $1 " " $2 " file is group writable" }
1.1 deraadt 367: $3 ~ /^-.......w/ \
1.84 schwarze 368: { print "user " $1 " " $2 " file is other writable" }'
1.1 deraadt 369:
370: # Files that should not be owned by someone else or writeable.
1.28 todd 371: list=".bashrc .bash_profile .bash_login .bash_logout .cshrc \
372: .emacs .exrc .forward .fvwmrc .inputrc .klogin .kshrc .login \
373: .logout .nexrc .profile .screenrc .ssh .ssh/config \
1.45 millert 374: .ssh/authorized_keys .ssh/authorized_keys2 .ssh/environment \
375: .ssh/known_hosts .ssh/rc .tcshrc .twmrc .xsession .xinitrc \
376: .Xdefaults .Xauthority"
1.14 millert 377: awk -F: '/^[^+-]/ { print $1 " " $6 }' /etc/passwd | \
1.1 deraadt 378: while read uid homedir; do
379: for f in $list ; do
380: file=${homedir}/${f}
381: if [ -f $file ] ; then
1.41 millert 382: echo "${uid} ${f} `ls -ldgT ${file}`"
1.1 deraadt 383: fi
384: done
385: done |
386: awk '$1 != $5 && $5 != "root" \
387: { print "user " $1 " " $2 " file is owned by " $5 }
388: $3 ~ /^-....w/ \
1.54 henning 389: { print "user " $1 " " $2 " file is group writable" }
1.1 deraadt 390: $3 ~ /^-.......w/ \
1.84 schwarze 391: { print "user " $1 " " $2 " file is other writable" }'
1.1 deraadt 392:
393: # Mailboxes should be owned by user and unreadable.
1.84 schwarze 394: next_part "Checking mailbox ownership."
1.1 deraadt 395: ls -l /var/mail | sed 1d | \
396: awk '$3 != $9 \
397: { print "user " $9 " mailbox is owned by " $3 }
398: $1 != "-rw-------" \
1.84 schwarze 399: { print "user " $9 " mailbox is " $1 ", group " $4 }'
1.1 deraadt 400:
1.13 millert 401: # File systems should not be globally exported.
1.84 schwarze 402: next_part "Checking for globally exported file systems."
1.13 millert 403: if [ -s /etc/exports ] ; then
404: awk '{
1.19 flipk 405: if (($1 ~ /^#/) || ($1 ~ /^$/))
1.1 deraadt 406: next;
1.13 millert 407: readonly = 0;
408: for (i = 2; i <= NF; ++i) {
1.19 flipk 409: if ($i ~ /^-ro$/)
1.13 millert 410: readonly = 1;
1.71 otto 411: else if ($i !~ /^-/ || $i ~ /^-network/)
1.13 millert 412: next;
413: }
414: if (readonly)
415: print "File system " $1 " globally exported, read-only."
416: else
417: print "File system " $1 " globally exported, read-write."
1.84 schwarze 418: }' < /etc/exports
1.1 deraadt 419: fi
420:
1.5 deraadt 421: # Display any changes in setuid/setgid files and devices.
1.84 schwarze 422: next_part "Setuid/device find errors:"
423: find / \( ! -fstype local \
1.72 deraadt 424: -o -fstype procfs -o -fstype afs -o -fstype xfs \) -a -prune -o \
1.13 millert 425: -type f -a \( -perm -u+s -o -perm -g+s \) -print0 -o \
1.30 millert 426: ! -type d -a ! -type f -a ! -type l -a ! -type s -a ! -type p \
1.84 schwarze 427: -print0 | xargs -0 ls -ldgT | sort +9 > $LIST
1.1 deraadt 428:
1.12 millert 429: # Display any changes in the setuid/setgid file list.
1.84 schwarze 430: next_part "Checking setuid/setgid files and devices:"
1.66 otto 431: FIELDS1=1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8,1.9,0
432: FIELDS2=2.1,2.2,2.3,2.4,2.5,2.6,2.7,2.8,2.9,0
433: egrep -av '^[bc]' $LIST | join -o $FIELDS2 -110 -210 -v2 /dev/null - > $TMP1
1.1 deraadt 434: if [ -s $TMP1 ] ; then
435: # Check to make sure uudecode isn't setuid.
1.66 otto 436: if grep -aw uudecode $TMP1 > /dev/null ; then
1.84 schwarze 437: echo "Uudecode is setuid."
1.1 deraadt 438: fi
439:
440: CUR=/var/backups/setuid.current
441: BACK=/var/backups/setuid.backup
442:
443: if [ -s $CUR ] ; then
444: if cmp -s $CUR $TMP1 ; then
445: :
446: else
1.84 schwarze 447: next_part "Setuid additions:"
448: join -o $FIELDS2 -110 -210 -v2 $CUR $TMP1 | \
449: tee $TMP2 | column -t
450:
451: next_part "Setuid deletions:"
452: join -o $FIELDS1 -110 -210 -v1 $CUR $TMP1 | \
453: tee -a $TMP2 | column -t
1.1 deraadt 454:
1.84 schwarze 455: next_part "Setuid changes:"
1.13 millert 456: sort +9 $TMP2 $CUR $TMP1 | \
1.84 schwarze 457: sed -e 's/[ ][ ]*/ /g' | uniq -u | column -t
1.1 deraadt 458:
459: cp $CUR $BACK
460: cp $TMP1 $CUR
461: fi
462: else
1.85 ! schwarze 463: next_part "Setuid additions:"
1.1 deraadt 464: column -t $TMP1
465: cp $TMP1 $CUR
466: fi
467: fi
468:
469: # Check for block and character disk devices that are readable or writeable
470: # or not owned by root.operator.
1.84 schwarze 471: next_part "Checking disk ownership and permissions."
1.1 deraadt 472: >$TMP1
1.13 millert 473: DISKLIST="ccd dk fd hd hk hp jb kra ra rb rd rl rx rz sd up vnd wd xd"
1.1 deraadt 474: for i in $DISKLIST; do
1.33 millert 475: egrep "^b.*/${i}[0-9][0-9]*[B-H]?[a-p]$" $LIST >> $TMP1
476: egrep "^c.*/r${i}[0-9][0-9]*[B-H]?[a-p]$" $LIST >> $TMP1
1.1 deraadt 477: done
478:
479: awk '$3 != "root" || $4 != "operator" || $1 !~ /.rw-r-----/ \
480: { printf("Disk %s is user %s, group %s, permissions %s.\n", \
1.84 schwarze 481: $11, $3, $4, $1); }' < $TMP1
1.1 deraadt 482:
1.66 otto 483: FIELDS1=1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8,1.9,1.10,0
484: FIELDS2=2.1,2.2,2.3,2.4,2.5,2.6,2.7,2.8,2.9,2.10,0
1.1 deraadt 485: # Display any changes in the device file list.
1.66 otto 486: egrep -a '^[bc]' $LIST | sort +10 | \
487: join -o $FIELDS2 -111 -211 -v2 /dev/null - > $TMP1
1.1 deraadt 488: if [ -s $TMP1 ] ; then
489: CUR=/var/backups/device.current
490: BACK=/var/backups/device.backup
491:
492: if [ -s $CUR ] ; then
493: if cmp -s $CUR $TMP1 ; then
494: :
495: else
1.84 schwarze 496: next_part "Device additions:"
497: join -o $FIELDS2 -111 -211 -v2 $CUR $TMP1 | \
498: tee $TMP2 | column -t
499:
500: next_part "Device deletions:"
501: join -o $FIELDS1 -111 -211 -v1 $CUR $TMP1 | \
502: tee -a $TMP2 | column -t
1.1 deraadt 503:
504: # Report any block device change. Ignore character
505: # devices, only the name is significant.
1.84 schwarze 506: next_part "Block device changes:"
1.1 deraadt 507: cat $TMP2 $CUR $TMP1 | \
508: sed -e '/^c/d' | \
509: sort +10 | \
510: sed -e 's/[ ][ ]*/ /g' | \
1.84 schwarze 511: uniq -u | \
512: column -t
1.1 deraadt 513:
514: cp $CUR $BACK
515: cp $TMP1 $CUR
516: fi
517: else
1.85 ! schwarze 518: next_part "Device additions:"
1.1 deraadt 519: column -t $TMP1
520: cp $TMP1 $CUR
521: fi
522: fi
523:
524: # Check special files.
525: # Check system binaries.
526: #
527: # Create the mtree tree specifications using:
528: #
1.69 jmc 529: # mtree -cx -p DIR -K md5digest,type >/etc/mtree/DIR.secure
530: # chown root:wheel /etc/mtree/DIR.secure
531: # chmod 600 /etc/mtree/DIR.secure
1.1 deraadt 532: #
533: # Note, this is not complete protection against Trojan horsed binaries, as
534: # the hacker can modify the tree specification to match the replaced binary.
535: # For details on really protecting yourself against modified binaries, see
536: # the mtree(8) manual page.
1.84 schwarze 537: next_part "Checking special files and directories.
538: Output format is:\n\tfilename:\n\t\tcriteria (shouldbe, reallyis)"
1.13 millert 539: if [ -d /etc/mtree ] ; then
1.2 deraadt 540: cd /etc/mtree
1.84 schwarze 541: mtree -e -l -p / -f /etc/mtree/special
1.1 deraadt 542: for file in *.secure; do
1.2 deraadt 543: [ $file = '*.secure' ] && continue
1.1 deraadt 544: tree=`sed -n -e '3s/.* //p' -e 3q $file`
1.84 schwarze 545: next_part "Checking system binaries in ${tree}:"
546: mtree -f $file -p $tree
1.1 deraadt 547: done
1.2 deraadt 548: else
549: echo /etc/mtree is missing
1.1 deraadt 550: fi
551:
552: # List of files that get backed up and checked for any modifications. Each
553: # file is expected to have two backups, /var/backups/file.{current,backup}.
554: # Any changes cause the files to rotate.
1.37 todd 555: _fnchg() {
556: echo "$1" | sed 's/^\///;s/\//_/g'
557: }
1.1 deraadt 558: if [ -s /etc/changelist ] ; then
1.46 millert 559: for file in `egrep -v "^(#|\+|$MP)" /etc/changelist`; do
1.37 todd 560: CUR=/var/backups/$(_fnchg "$file").current
561: BACK=/var/backups/$(_fnchg "$file").backup
1.84 schwarze 562: next_part "======\n${file} diffs (-OLD +NEW)\n======"
1.37 todd 563: if [ -s $file -a ! -d $file ] ; then
1.1 deraadt 564: if [ -s $CUR ] ; then
1.84 schwarze 565: diff -ua $CUR $file
566: if [ -s $PARTOUT ] ; then
1.1 deraadt 567: cp -p $CUR $BACK
568: cp -p $file $CUR
1.56 millert 569: chown root:wheel $CUR $BACK
1.1 deraadt 570: fi
571: else
1.77 dlg 572: diff -u /dev/null $file
1.1 deraadt 573: cp -p $file $CUR
1.56 millert 574: chown root:wheel $CUR
1.46 millert 575: fi
576: fi
1.77 dlg 577: if [ ! -s $file -a -s $CUR ]; then
578: diff -u $CUR /dev/null
579: cp -p $CUR $BACK
580: rm -f $CUR
581: chown root:wheel $BACK
582: fi
1.46 millert 583: done
584: for file in `egrep "^\+" /etc/changelist`; do
585: file="${file#+}"
586: CUR=/var/backups/$(_fnchg "$file").current.md5
587: BACK=/var/backups/$(_fnchg "$file").backup.md5
588: if [ -s $file -a ! -d $file ] ; then
589: MD5_NEW=`md5 $file | sed 's/^.* //'`
590: if [ -s $CUR ] ; then
591: MD5_OLD="`cat $CUR`"
592: if [ "$MD5_NEW" != "$MD5_OLD" ]; then
1.85 ! schwarze 593: next_part "======\n${file} MD5 checksums\n======"
1.46 millert 594: echo "OLD: $MD5_OLD"
595: echo "NEW: $MD5_NEW"
596: cp -p $CUR $BACK
597: echo $MD5_NEW > $CUR
1.56 millert 598: chown root:wheel $CUR $BACK
1.46 millert 599: chmod 600 $CUR
600: fi
601: else
1.85 ! schwarze 602: next_part "======\n${file} new MD5 checksum\n======"
1.77 dlg 603: echo "NEW: $MD5_NEW"
1.46 millert 604: echo $MD5_NEW > $CUR
1.56 millert 605: chown root:wheel $CUR
1.46 millert 606: chmod 600 $CUR
1.1 deraadt 607: fi
1.77 dlg 608: fi
609: if [ ! -s $file -a -s $CUR ]; then
610: MD5_OLD="`cat $CUR`"
1.85 ! schwarze 611: next_part "======\n${file} removed MD5 checksum\n======"
1.77 dlg 612: echo "OLD: $MD5_OLD"
613: cp -p $CUR $BACK
614: rm $CUR
615: chown root:wheel $BACK
1.1 deraadt 616: fi
617: done
618: fi
1.67 millert 619:
620: # Make backups of the labels for any mounted disks and produce diffs
621: # when they change.
622: for d in `df -ln | sed -n 's:^/dev/\([a-z]*[0-9]*\)[a-p].*$:\1:p' | sort -u`; do
623: file=/var/backups/disklabel.$d
624: CUR=$file.current
625: BACK=$file.backup
1.84 schwarze 626: next_part "======\n${d} diffs (-OLD +NEW)\n======"
1.68 millert 627: if disklabel $d > $file 2>&1 ; then
1.67 millert 628: if [ -s $CUR ] ; then
1.84 schwarze 629: diff -u $CUR $file
630: if [ -s $PARTOUT ] ; then
1.67 millert 631: cp -p $CUR $BACK
632: cp -p $file $CUR
633: chown root:wheel $CUR $BACK
634: fi
635: else
636: cp -p $file $CUR
637: chown root:wheel $CUR
638: fi
639: fi
640: rm -f $file
641: done
1.79 sthen 642:
643: # Backup the list of installed packages and produce diffs when it changes.
1.84 schwarze 644: next_part "======\nPackage list changes (-OLD +NEW)\n======"
1.79 sthen 645: file=/var/backups/pkglist
646: CUR=$file.current
647: BACK=$file.backup
648: if pkg_info > $file 2>&1 ; then
649: if [ -s $CUR ] ; then
1.84 schwarze 650: diff -u $CUR $file
651: if [ -s $PARTOUT ] ; then
1.79 sthen 652: cp -p $CUR $BACK
653: cp -p $file $CUR
654: chown root:wheel $CUR $BACK
655: fi
656: else
657: cp -p $file $CUR
658: chown root:wheel $CUR
659: fi
660: fi
661: rm -f $file
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