Annotation of src/etc/security, Revision 1.27
1.1 deraadt 1: #!/bin/sh -
2: #
1.27 ! marc 3: # $OpenBSD: security,v 1.26 1998/02/25 16:00:29 millert Exp $
1.13 millert 4: # from: @(#)security 8.1 (Berkeley) 6/9/93
1.1 deraadt 5: #
1.13 millert 6:
1.1 deraadt 7: PATH=/sbin:/usr/sbin:/bin:/usr/bin
8:
9: umask 077
10:
1.7 deraadt 11: DIR=/tmp/_secure$$
12: ERR=$DIR/_secure1
13: TMP1=$DIR/_secure2
14: TMP2=$DIR/_secure3
15: TMP3=$DIR/_secure4
16: LIST=$DIR/_secure5
17: OUTPUT=$DIR/_secure6
1.1 deraadt 18:
1.7 deraadt 19: if ! mkdir $DIR ; then
20: printf "tmp directory %s already exists, looks like:\n" $DIR
21: ls -alF $DIR
22: exit 1
23: fi
1.8 deraadt 24:
1.25 deraadt 25: trap 'rm -rf $DIR; exit 1' 0 1 2 3 13 15
1.1 deraadt 26:
27: # Check the master password file syntax.
28: MP=/etc/master.passwd
29: awk -F: '{
30: if ($0 ~ /^[ ]*$/) {
31: printf("Line %d is a blank line.\n", NR);
32: next;
33: }
34: if (NF != 10)
35: printf("Line %d has the wrong number of fields.\n", NR);
1.15 millert 36: if ($1 ~ /^[+-]/)
1.2 deraadt 37: next;
38: if ($1 == "")
1.13 millert 39: printf("Line %d has an empty login field.\n", NR);
1.2 deraadt 40: else if ($1 !~ /^[A-Za-z0-9][A-Za-z0-9_-]*$/)
1.1 deraadt 41: printf("Login %s has non-alphanumeric characters.\n", $1);
42: if (length($1) > 8)
43: printf("Login %s has more than 8 characters.\n", $1);
44: if ($2 == "")
45: printf("Login %s has no password.\n", $1);
1.23 deraadt 46: if ($2 != "" && length($2) != 13 && ($10 ~ /.*sh$/ || $10 == "") &&
47: ($2 !~ /^\$[0-9a-f]+\$/) && ($2 != "skey")) {
1.26 millert 48: if (system("test -s /etc/skeykeys && grep -q \"^"$1" \" /etc/skeykeys") == 0)
1.23 deraadt 49: printf("Login %s is off but still has a valid shell and an entry in /etc/skeykeys.\n", $1);
50: if (system("test -d "$9" -a ! -r "$9"") == 0)
51: printf("Login %s if off but still has valid shell and home directory is unreadable\n\t by root; cannot check for existance of alternate access files.\n", $1);
52: 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"))
53: 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);
54: }
1.9 deraadt 55: if ($3 == 0 && $1 != "root")
1.1 deraadt 56: printf("Login %s has a user id of 0.\n", $1);
57: if ($3 < 0)
58: printf("Login %s has a negative user id.\n", $1);
59: if ($4 < 0)
60: printf("Login %s has a negative group id.\n", $1);
61: }' < $MP > $OUTPUT
62: if [ -s $OUTPUT ] ; then
63: printf "\nChecking the $MP file:\n"
64: cat $OUTPUT
65: fi
66:
67: awk -F: '{ print $1 }' $MP | sort | uniq -d > $OUTPUT
68: if [ -s $OUTPUT ] ; then
69: printf "\n$MP has duplicate user names.\n"
70: column $OUTPUT
71: fi
72:
1.9 deraadt 73: awk -F: '{ print $1 " " $3 }' $MP | sort -n +1 | tee $TMP1 |
1.1 deraadt 74: uniq -d -f 1 | awk '{ print $2 }' > $TMP2
75: if [ -s $TMP2 ] ; then
76: printf "\n$MP has duplicate user id's.\n"
77: while read uid; do
78: grep -w $uid $TMP1
79: done < $TMP2 | column
80: fi
81:
82: # Backup the master password file; a special case, the normal backup
83: # mechanisms also print out file differences and we don't want to do
84: # that because this file has encrypted passwords in it.
1.2 deraadt 85: if [ ! -d /var/backups ] ; then
86: mkdir /var/backups
87: chmod 755 /var/backups
88: fi
1.1 deraadt 89: CUR=/var/backups/`basename $MP`.current
90: BACK=/var/backups/`basename $MP`.backup
91: if [ -s $CUR ] ; then
92: if cmp -s $CUR $MP; then
93: :
94: else
95: cp -p $CUR $BACK
96: cp -p $MP $CUR
97: chown root.wheel $CUR
98: fi
99: else
100: cp -p $MP $CUR
101: chown root.wheel $CUR
102: fi
103:
104: # Check the group file syntax.
105: GRP=/etc/group
106: awk -F: '{
107: if ($0 ~ /^[ ]*$/) {
108: printf("Line %d is a blank line.\n", NR);
109: next;
110: }
1.2 deraadt 111: if ($1 ~ /^[+-].*$/)
112: next;
1.1 deraadt 113: if (NF != 4)
114: printf("Line %d has the wrong number of fields.\n", NR);
1.13 millert 115: if ($1 !~ /^[A-za-z0-9][A-za-z0-9_-]*$/)
1.1 deraadt 116: printf("Group %s has non-alphanumeric characters.\n", $1);
117: if (length($1) > 8)
118: printf("Group %s has more than 8 characters.\n", $1);
119: if ($3 !~ /[0-9]*/)
120: printf("Login %s has a negative group id.\n", $1);
121: }' < $GRP > $OUTPUT
122: if [ -s $OUTPUT ] ; then
123: printf "\nChecking the $GRP file:\n"
124: cat $OUTPUT
125: fi
126:
127: awk -F: '{ print $1 }' $GRP | sort | uniq -d > $OUTPUT
128: if [ -s $OUTPUT ] ; then
129: printf "\n$GRP has duplicate group names.\n"
130: column $OUTPUT
131: fi
132:
133: # Check for root paths, umask values in startup files.
134: # The check for the root paths is problematical -- it's likely to fail
135: # in other environments. Once the shells have been modified to warn
136: # of '.' in the path, the path tests should go away.
137: > $OUTPUT
138: rhome=/root
139: umaskset=no
140: list="/etc/csh.cshrc /etc/csh.login ${rhome}/.cshrc ${rhome}/.login"
141: for i in $list ; do
1.15 millert 142: if [ -s $i ] ; then
1.1 deraadt 143: if egrep umask $i > /dev/null ; then
144: umaskset=yes
145: fi
146: egrep umask $i |
147: awk '$2 % 100 < 20 \
148: { print "Root umask is group writeable" }
149: $2 % 10 < 2 \
150: { print "Root umask is other writeable" }' >> $OUTPUT
1.21 deraadt 151: SAVE_PATH=$PATH
152: unset PATH
1.1 deraadt 153: /bin/csh -f -s << end-of-csh > /dev/null 2>&1
154: source $i
155: /bin/ls -ldgT \$path > $TMP1
156: end-of-csh
1.21 deraadt 157: PATH=$SAVE_PATH
1.1 deraadt 158: awk '{
159: if ($10 ~ /^\.$/) {
160: print "The root path includes .";
161: next;
162: }
163: }
164: $1 ~ /^d....w/ \
165: { print "Root path directory " $10 " is group writeable." } \
166: $1 ~ /^d.......w/ \
167: { print "Root path directory " $10 " is other writeable." }' \
168: < $TMP1 >> $OUTPUT
169: fi
170: done
171: if [ $umaskset = "no" -o -s $OUTPUT ] ; then
172: printf "\nChecking root csh paths, umask values:\n$list\n"
1.13 millert 173: if [ -s $OUTPUT ] ; then
1.1 deraadt 174: cat $OUTPUT
175: fi
176: if [ $umaskset = "no" ] ; then
177: printf "\nRoot csh startup files do not set the umask.\n"
178: fi
179: fi
180:
181: > $OUTPUT
182: rhome=/root
183: umaskset=no
1.20 millert 184: list="/etc/profile ${rhome}/.profile"
1.1 deraadt 185: for i in $list; do
1.15 millert 186: if [ -s $i ] ; then
1.1 deraadt 187: if egrep umask $i > /dev/null ; then
188: umaskset=yes
189: fi
190: egrep umask $i |
191: awk '$2 % 100 < 20 \
192: { print "Root umask is group writeable" } \
193: $2 % 10 < 2 \
194: { print "Root umask is other writeable" }' >> $OUTPUT
1.21 deraadt 195: SAVE_PATH=$PATH
196: unset PATH
1.1 deraadt 197: /bin/sh << end-of-sh > /dev/null 2>&1
198: . $i
199: list=\`echo \$PATH | /usr/bin/sed -e 's/:/ /g'\`
200: /bin/ls -ldgT \$list > $TMP1
201: end-of-sh
1.21 deraadt 202: PATH=$SAVE_PATH
1.1 deraadt 203: awk '{
204: if ($10 ~ /^\.$/) {
205: print "The root path includes .";
206: next;
207: }
208: }
209: $1 ~ /^d....w/ \
210: { print "Root path directory " $10 " is group writeable." } \
211: $1 ~ /^d.......w/ \
212: { print "Root path directory " $10 " is other writeable." }' \
213: < $TMP1 >> $OUTPUT
214:
215: fi
216: done
217: if [ $umaskset = "no" -o -s $OUTPUT ] ; then
218: printf "\nChecking root sh paths, umask values:\n$list\n"
1.13 millert 219: if [ -s $OUTPUT ] ; then
1.1 deraadt 220: cat $OUTPUT
221: fi
222: if [ $umaskset = "no" ] ; then
223: printf "\nRoot sh startup files do not set the umask.\n"
224: fi
225: fi
226:
1.27 ! marc 227: # A good .kshrc will not have a umask or path, that being set in .profile
! 228: # check anyway.
! 229: > $OUTPUT
! 230: rhome=/root
! 231: list="/etc/ksh.kshrc ${rhome}/.kshrc"
! 232: for i in $list; do
! 233: if [ -s $i ] ; then
! 234: egrep umask $i |
! 235: awk '$2 % 100 < 20 \
! 236: { print "Root umask is group writeable" } \
! 237: $2 % 10 < 2 \
! 238: { print "Root umask is other writeable" }' >> $OUTPUT
! 239: if egrep PATH= $i > /dev/null ; then
! 240: SAVE_PATH=$PATH
! 241: unset PATH
! 242: /bin/ksh << end-of-sh > /dev/null 2>&1
! 243: . $i
! 244: list=\`echo \$PATH | /usr/bin/sed -e 's/:/ /g'\`
! 245: /bin/ls -ldgT \$list > $TMP1
! 246: end-of-sh
! 247: PATH=$SAVE_PATH
! 248: awk '{
! 249: if ($10 ~ /^\.$/) {
! 250: print "The root path includes .";
! 251: next;
! 252: }
! 253: }
! 254: $1 ~ /^d....w/ \
! 255: { print "Root path directory " $10 " is group writeable." } \
! 256: $1 ~ /^d.......w/ \
! 257: { print "Root path directory " $10 " is other writeable." }' \
! 258: < $TMP1 >> $OUTPUT
! 259: fi
! 260:
! 261: fi
! 262: done
! 263: if [ -s $OUTPUT ] ; then
! 264: printf "\nChecking root ksh paths, umask values:\n$list\n"
! 265: cat $OUTPUT
! 266: fi
! 267:
1.1 deraadt 268: # Root and uucp should both be in /etc/ftpusers.
269: if egrep root /etc/ftpusers > /dev/null ; then
270: :
271: else
272: printf "\nRoot not listed in /etc/ftpusers file.\n"
273: fi
274: if egrep uucp /etc/ftpusers > /dev/null ; then
275: :
276: else
277: printf "\nUucp not listed in /etc/ftpusers file.\n"
278: fi
279:
280: # Uudecode should not be in the /etc/aliases file.
281: if egrep 'uudecode|decode' /etc/aliases; then
282: printf "\nThere is an entry for uudecode in the /etc/aliases file.\n"
283: fi
284:
285: # Files that should not have + signs.
1.2 deraadt 286: list="/etc/hosts.equiv /etc/shosts.equiv /etc/hosts.lpd"
1.1 deraadt 287: for f in $list ; do
1.6 millert 288: if [ -s $f ] ; then
1.2 deraadt 289: awk '{
1.13 millert 290: if ($0 ~ /^\+@.*$/)
1.2 deraadt 291: next;
1.13 millert 292: if ($0 ~ /^\+.*$/)
1.2 deraadt 293: printf("\nPlus sign in %s file.\n", FILENAME);
294: }' $f
1.1 deraadt 295: fi
296: done
297:
1.13 millert 298: # Check for special users with .rhosts/.shosts files. Only root
299: # should have .rhosts/.shosts files. Also, .rhosts/.shosts
300: # files should not have plus signs.
1.14 millert 301: awk -F: '$1 != "root" && $1 !~ /^[+-]/ && \
1.1 deraadt 302: ($3 < 100 || $1 == "ftp" || $1 == "uucp") \
303: { print $1 " " $6 }' /etc/passwd |
304: while read uid homedir; do
1.2 deraadt 305: for j in .rhosts .shosts; do
1.14 millert 306: # Root owned .rhosts/.shosts files are ok.
1.15 millert 307: if [ -s ${homedir}/$j -a ! -O ${homedir}/$j ] ; then
1.2 deraadt 308: rhost=`ls -ldgT ${homedir}/$j`
309: printf "$uid: $rhost\n"
310: fi
311: done
1.1 deraadt 312: done > $OUTPUT
313: if [ -s $OUTPUT ] ; then
1.2 deraadt 314: printf "\nChecking for special users with .rhosts/.shosts files.\n"
1.1 deraadt 315: cat $OUTPUT
316: fi
317:
1.14 millert 318: awk -F: '/^[^+-]/ { print $1 " " $6 }' /etc/passwd | \
1.1 deraadt 319: while read uid homedir; do
1.2 deraadt 320: for j in .rhosts .shosts; do
1.13 millert 321: if [ -s ${homedir}/$j ] ; then
1.2 deraadt 322: awk '{
323: if ($0 ~ /^+@.*$/ )
324: next;
1.4 deraadt 325: if ($0 ~ /^\+[ ]*$/ )
1.2 deraadt 326: printf("%s has + sign in it.\n",
1.13 millert 327: FILENAME);
1.2 deraadt 328: }' ${homedir}/$j
329: fi
330: done
1.1 deraadt 331: done > $OUTPUT
332: if [ -s $OUTPUT ] ; then
1.2 deraadt 333: printf "\nChecking .rhosts/.shosts files syntax.\n"
1.1 deraadt 334: cat $OUTPUT
335: fi
336:
337: # Check home directories. Directories should not be owned by someone else
338: # or writeable.
1.14 millert 339: awk -F: '/^[^+-]/ { print $1 " " $6 }' /etc/passwd | \
1.1 deraadt 340: while read uid homedir; do
341: if [ -d ${homedir}/ ] ; then
342: file=`ls -ldgT ${homedir}`
343: printf "$uid $file\n"
344: fi
345: done |
346: awk '$1 != $4 && $4 != "root" \
347: { print "user " $1 " home directory is owned by " $4 }
348: $2 ~ /^-....w/ \
349: { print "user " $1 " home directory is group writeable" }
350: $2 ~ /^-.......w/ \
351: { print "user " $1 " home directory is other writeable" }' > $OUTPUT
352: if [ -s $OUTPUT ] ; then
353: printf "\nChecking home directories.\n"
354: cat $OUTPUT
355: fi
356:
357: # Files that should not be owned by someone else or readable.
1.2 deraadt 358: list=".netrc .rhosts .shosts"
1.14 millert 359: awk -F: '/^[^+-]/ { print $1 " " $6 }' /etc/passwd | \
1.1 deraadt 360: while read uid homedir; do
361: for f in $list ; do
362: file=${homedir}/${f}
363: if [ -f $file ] ; then
364: printf "$uid $f `ls -ldgT $file`\n"
365: fi
366: done
367: done |
368: awk '$1 != $5 && $5 != "root" \
369: { print "user " $1 " " $2 " file is owned by " $5 }
1.13 millert 370: $3 ~ /^-...r/ \
371: { print "user " $1 " " $2 " file is group readable" }
1.1 deraadt 372: $3 ~ /^-......r/ \
373: { print "user " $1 " " $2 " file is other readable" }
374: $3 ~ /^-....w/ \
375: { print "user " $1 " " $2 " file is group writeable" }
376: $3 ~ /^-.......w/ \
377: { print "user " $1 " " $2 " file is other writeable" }' > $OUTPUT
378:
379: # Files that should not be owned by someone else or writeable.
380: list=".bashrc .cshrc .emacs .exrc .forward .klogin .login .logout \
1.27 ! marc 381: .profile .tcshrc .kshrc .xsession"
1.14 millert 382: awk -F: '/^[^+-]/ { print $1 " " $6 }' /etc/passwd | \
1.1 deraadt 383: while read uid homedir; do
384: for f in $list ; do
385: file=${homedir}/${f}
386: if [ -f $file ] ; then
387: printf "$uid $f `ls -ldgT $file`\n"
388: fi
389: done
390: done |
391: awk '$1 != $5 && $5 != "root" \
392: { print "user " $1 " " $2 " file is owned by " $5 }
393: $3 ~ /^-....w/ \
394: { print "user " $1 " " $2 " file is group writeable" }
395: $3 ~ /^-.......w/ \
396: { print "user " $1 " " $2 " file is other writeable" }' >> $OUTPUT
397: if [ -s $OUTPUT ] ; then
398: printf "\nChecking dot files.\n"
399: cat $OUTPUT
400: fi
401:
402: # Mailboxes should be owned by user and unreadable.
403: ls -l /var/mail | sed 1d | \
404: awk '$3 != $9 \
405: { print "user " $9 " mailbox is owned by " $3 }
406: $1 != "-rw-------" \
407: { print "user " $9 " mailbox is " $1 ", group " $4 }' > $OUTPUT
408: if [ -s $OUTPUT ] ; then
409: printf "\nChecking mailbox ownership.\n"
410: cat $OUTPUT
411: fi
412:
1.13 millert 413: # File systems should not be globally exported.
414: if [ -s /etc/exports ] ; then
415: awk '{
1.19 flipk 416: if (($1 ~ /^#/) || ($1 ~ /^$/))
1.1 deraadt 417: next;
1.13 millert 418: readonly = 0;
419: for (i = 2; i <= NF; ++i) {
1.19 flipk 420: if ($i ~ /^-ro$/)
1.13 millert 421: readonly = 1;
422: else if ($i !~ /^-/)
423: next;
424: }
425: if (readonly)
426: print "File system " $1 " globally exported, read-only."
427: else
428: print "File system " $1 " globally exported, read-write."
429: }' < /etc/exports > $OUTPUT
430: if [ -s $OUTPUT ] ; then
431: printf "\nChecking for globally exported file systems.\n"
432: cat $OUTPUT
433: fi
1.1 deraadt 434: fi
435:
1.5 deraadt 436: # Display any changes in setuid/setgid files and devices.
437: pending="\nChecking setuid/setgid files and devices:\n"
1.1 deraadt 438: (find / \( ! -fstype local -o -fstype fdesc -o -fstype kernfs \
1.13 millert 439: -o -fstype procfs \) -a -prune -o \
440: -type f -a \( -perm -u+s -o -perm -g+s \) -print0 -o \
441: ! -type d -a ! -type f -a ! -type l -a ! -type s -print0 | \
442: xargs -0 ls -ldgT | sort +9 > $LIST) 2> $OUTPUT
1.1 deraadt 443:
444: # Display any errors that occurred during system file walk.
445: if [ -s $OUTPUT ] ; then
1.2 deraadt 446: printf "${pending}Setuid/device find errors:\n"
447: pending=
1.1 deraadt 448: cat $OUTPUT
449: printf "\n"
450: fi
451:
1.12 millert 452: # Display any changes in the setuid/setgid file list.
1.13 millert 453: egrep -v '^[bc]' $LIST > $TMP1
1.1 deraadt 454: if [ -s $TMP1 ] ; then
455: # Check to make sure uudecode isn't setuid.
456: if grep -w uudecode $TMP1 > /dev/null ; then
1.2 deraadt 457: printf "${pending}\nUudecode is setuid.\n"
458: pending=
1.1 deraadt 459: fi
460:
461: CUR=/var/backups/setuid.current
462: BACK=/var/backups/setuid.backup
463:
464: if [ -s $CUR ] ; then
465: if cmp -s $CUR $TMP1 ; then
466: :
467: else
468: > $TMP2
1.13 millert 469: join -110 -210 -v2 $CUR $TMP1 > $OUTPUT
1.1 deraadt 470: if [ -s $OUTPUT ] ; then
1.2 deraadt 471: printf "${pending}Setuid additions:\n"
472: pending=
1.1 deraadt 473: tee -a $TMP2 < $OUTPUT
474: printf "\n"
475: fi
476:
1.13 millert 477: join -110 -210 -v1 $CUR $TMP1 > $OUTPUT
1.1 deraadt 478: if [ -s $OUTPUT ] ; then
1.2 deraadt 479: printf "${pending}Setuid deletions:\n"
480: pending=
1.1 deraadt 481: tee -a $TMP2 < $OUTPUT
482: printf "\n"
483: fi
484:
1.13 millert 485: sort +9 $TMP2 $CUR $TMP1 | \
1.1 deraadt 486: sed -e 's/[ ][ ]*/ /g' | uniq -u > $OUTPUT
487: if [ -s $OUTPUT ] ; then
1.2 deraadt 488: printf "${pending}Setuid changes:\n"
489: pending=
1.1 deraadt 490: column -t $OUTPUT
491: printf "\n"
492: fi
493:
494: cp $CUR $BACK
495: cp $TMP1 $CUR
496: fi
497: else
1.2 deraadt 498: printf "${pending}Setuid additions:\n"
499: pending=
1.1 deraadt 500: column -t $TMP1
501: printf "\n"
502: cp $TMP1 $CUR
503: fi
504: fi
505:
506: # Check for block and character disk devices that are readable or writeable
507: # or not owned by root.operator.
508: >$TMP1
1.13 millert 509: DISKLIST="ccd dk fd hd hk hp jb kra ra rb rd rl rx rz sd up vnd wd xd"
1.1 deraadt 510: for i in $DISKLIST; do
1.11 tholo 511: egrep "^b.*/${i}[0-9][0-9]*[a-p]$" $LIST >> $TMP1
512: egrep "^c.*/r${i}[0-9][0-9]*[a-p]$" $LIST >> $TMP1
1.1 deraadt 513: done
514:
515: awk '$3 != "root" || $4 != "operator" || $1 !~ /.rw-r-----/ \
516: { printf("Disk %s is user %s, group %s, permissions %s.\n", \
517: $11, $3, $4, $1); }' < $TMP1 > $OUTPUT
518: if [ -s $OUTPUT ] ; then
519: printf "\nChecking disk ownership and permissions.\n"
520: cat $OUTPUT
521: printf "\n"
522: fi
523:
524: # Display any changes in the device file list.
525: egrep '^[bc]' $LIST | sort +10 > $TMP1
526: if [ -s $TMP1 ] ; then
527: CUR=/var/backups/device.current
528: BACK=/var/backups/device.backup
529:
530: if [ -s $CUR ] ; then
531: if cmp -s $CUR $TMP1 ; then
532: :
533: else
534: > $TMP2
535: join -111 -211 -v2 $CUR $TMP1 > $OUTPUT
536: if [ -s $OUTPUT ] ; then
537: printf "Device additions:\n"
538: tee -a $TMP2 < $OUTPUT
539: printf "\n"
540: fi
541:
542: join -111 -211 -v1 $CUR $TMP1 > $OUTPUT
543: if [ -s $OUTPUT ] ; then
544: printf "Device deletions:\n"
545: tee -a $TMP2 < $OUTPUT
546: printf "\n"
547: fi
548:
549: # Report any block device change. Ignore character
550: # devices, only the name is significant.
551: cat $TMP2 $CUR $TMP1 | \
552: sed -e '/^c/d' | \
553: sort +10 | \
554: sed -e 's/[ ][ ]*/ /g' | \
555: uniq -u > $OUTPUT
556: if [ -s $OUTPUT ] ; then
557: printf "Block device changes:\n"
558: column -t $OUTPUT
559: printf "\n"
560: fi
561:
562: cp $CUR $BACK
563: cp $TMP1 $CUR
564: fi
565: else
566: printf "Device additions:\n"
567: column -t $TMP1
568: printf "\n"
569: cp $TMP1 $CUR
570: fi
571: fi
572:
573: # Check special files.
574: # Check system binaries.
575: #
576: # Create the mtree tree specifications using:
577: #
578: # mtree -cx -pDIR -kcksum,gid,mode,nlink,size,link,time,uid > DIR.secure
1.2 deraadt 579: # chown root.wheel DIR.secure
580: # chmod 600 DIR.secure
1.1 deraadt 581: #
582: # Note, this is not complete protection against Trojan horsed binaries, as
583: # the hacker can modify the tree specification to match the replaced binary.
584: # For details on really protecting yourself against modified binaries, see
585: # the mtree(8) manual page.
1.13 millert 586: if [ -d /etc/mtree ] ; then
1.2 deraadt 587: cd /etc/mtree
1.1 deraadt 588: mtree -e -p / -f /etc/mtree/special > $OUTPUT
589: if [ -s $OUTPUT ] ; then
590: printf "\nChecking special files and directories.\n"
591: cat $OUTPUT
592: fi
593:
594: > $OUTPUT
595: for file in *.secure; do
1.2 deraadt 596: [ $file = '*.secure' ] && continue
1.1 deraadt 597: tree=`sed -n -e '3s/.* //p' -e 3q $file`
598: mtree -f $file -p $tree > $TMP1
1.13 millert 599: if [ -s $TMP1 ] ; then
1.1 deraadt 600: printf "\nChecking $tree:\n" >> $OUTPUT
601: cat $TMP1 >> $OUTPUT
602: fi
603: done
604: if [ -s $OUTPUT ] ; then
605: printf "\nChecking system binaries:\n"
606: cat $OUTPUT
607: fi
1.2 deraadt 608: else
609: echo /etc/mtree is missing
1.1 deraadt 610: fi
611:
612: # List of files that get backed up and checked for any modifications. Each
613: # file is expected to have two backups, /var/backups/file.{current,backup}.
614: # Any changes cause the files to rotate.
615: if [ -s /etc/changelist ] ; then
1.24 deraadt 616: for file in `egrep -v "^#|$MP" /etc/changelist`; do
1.1 deraadt 617: CUR=/var/backups/`basename $file`.current
618: BACK=/var/backups/`basename $file`.backup
1.13 millert 619: if [ -s $file ] ; then
1.1 deraadt 620: if [ -s $CUR ] ; then
621: diff $CUR $file > $OUTPUT
622: if [ -s $OUTPUT ] ; then
623: printf "\n======\n%s diffs (OLD < > NEW)\n======\n" $file
624: cat $OUTPUT
625: cp -p $CUR $BACK
626: cp -p $file $CUR
627: chown root.wheel $CUR $BACK
628: fi
629: else
630: cp -p $file $CUR
631: chown root.wheel $CUR
632: fi
633: fi
634: done
635: fi
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