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-rwxr-xr-xcron-sh/file_check.sh124
1 files changed, 124 insertions, 0 deletions
diff --git a/cron-sh/file_check.sh b/cron-sh/file_check.sh
index 7886387..f91dce3 100755
--- a/cron-sh/file_check.sh
+++ b/cron-sh/file_check.sh
@@ -15,6 +15,8 @@ if [ SECURITY_CHECK == "no" ]; then
exit 0
fi
+OUT=./blah
+
# Modified filters coming from debian security scripts.
CS_NFSAFS='(nfs|afs|xfs|coda)'
CS_TYPES=' type (devpts|auto|proc|msdos|fat|vfat|iso9660|ncpfs|smbfs|'$CS_NFSAFS')'
@@ -266,6 +268,128 @@ if [ ${CHECK_OPEN_PORT}=="yes" ]; then
fi
fi
+### /etc/exports check ###
+
+# File systems should not be globally exported.
+if [ -s /etc/exports ] ; then
+ awk '{
+ if (($1 ~ /^#/) || ($1 ~ /^$/)) next;
+ readonly = 0;
+ for (i = 2; i <= NF; ++i) {
+ if ($i ~ /^-ro$/)
+ readonly = 1;
+ else if ($i !~ /^-/)
+ next;
+ }
+ if (readonly) {
+ print "Warning : Nfs File system " $1 " globally exported, read-only.";
+ } else print "Warning : Nfs File system " $1 " globally exported, read-write.";
+ }' < /etc/exports > $OUT
+ if [ -s "$OUT" ] ; then
+ printf "\nChecking for globally exported file systems.\n"
+ cat "$OUT"
+ fi
+fi
+
+
+# nfs mounts with missing nosuid
+/bin/mount | /bin/grep -v nosuid | /bin/grep ' nfs ' > $OUT
+if [ -s "$OUT" ] ; then
+ printf "\nThe following NFS mounts haven't got the nosuid option set:\n"
+ cat "$OUT"
+fi
+
+# Files that should not be owned by someone else or readable.
+list=".netrc .rhosts .shosts .Xauthority .pgp/secring.pgp .ssh/identity .ssh/random_seed"
+awk -F: '/^[^+-]/ { print $1 " " $6 }' /etc/passwd | \
+while read uid homedir; do
+ for f in $list ; do
+ file=${homedir}/${f}
+ if [ -f $file ] ; then
+ printf "$uid $f `ls -ldcg $file`\n"
+ fi
+ done
+done |
+awk '$1 != $5 && $5 != "root" \
+ { print "user " $1 " " $2 " : file is owned by " $5 }
+ $3 ~ /^-...r/ \
+ { print "user " $1 " " $2 " : file is group readable" }
+ $3 ~ /^-......r/ \
+ { print "user " $1 " " $2 " : file is other readable" }
+ $3 ~ /^-....w/ \
+ { print "user " $1 " " $2 " : file is group writeable" }
+ $3 ~ /^-.......w/ \
+ { print "user " $1 " " $2 " : file is other writeable" }' > $OUT
+
+
+# Files that should not be owned by someone else or writeable.
+list=".bashrc .bash_profile .bash_login .bash_logout .cshrc .emacs .exrc \
+.forward .klogin .login .logout .profile .tcshrc .fvwmrc .inputrc .kshrc \
+.nexrc .screenrc .ssh .ssh/config .ssh/authorized_keys .ssh/environment \
+.ssh/known_hosts .ssh/rc .twmrc .xsession .xinitrc .Xdefaults"
+awk -F: '/^[^+-]/ { print $1 " " $6 }' /etc/passwd | \
+while read uid homedir; do
+ for f in $list ; do
+ file=${homedir}/${f}
+ if [ -f $file ] ; then
+ printf "$uid $f `ls -ldcg $file`\n"
+ fi
+ done
+done |
+awk '$1 != $5 && $5 != "root" \
+ { print "user " $1 " " $2 " : file is owned by " $5 }
+ $3 ~ /^-....w/ \
+ { print "user " $1 " " $2 " : file is group writeable" }
+ $3 ~ /^-.......w/ \
+ { print "user " $1 " " $2 " : file is other writeable" }' >> $OUT
+if [ -s "$OUT" ] ; then
+ printf "\nChecking dot files.\n"
+ cat "$OUT"
+fi
+
+# Check home directories. Directories should not be owned by someone else
+# or writeable.
+awk -F: '/^[^+-]/ { print $1 " " $6 }' /etc/passwd | \
+while read uid homedir; do
+ if [ -d ${homedir}/ ] ; then
+ file=`ls -ldg ${homedir}`
+ printf "$uid $file\n"
+ fi
+done |
+awk '$1 != $4 && $4 != "root" \
+ { print "user " $1 " : home directory is owned by " $4 }
+ $2 ~ /^-....w/ \
+ { print "user " $1 " : home directory is group writeable" }
+ $2 ~ /^-.......w/ \
+ { print "user " $1 " : home directory is other writeable" }' > $OUT
+if [ -s "$OUT" ] ; then
+ printf "\nChecking home directories.\n"
+ cat "$OUT"
+fi
+
+# Files that should not have + signs.
+list="/etc/hosts.equiv /etc/shosts.equiv /etc/hosts.lpd"
+for f in $list ; do
+ if [ -s $f ] ; then
+ awk '{
+ if ($0 ~ /^\+@.*$/)
+ next;
+ if ($0 ~ /^\+.*$/)
+ printf("\nPlus sign in the file %s\n", FILENAME);
+ }' $f
+ fi
+done
+
+
+# executables should not be in the /etc/aliases file.
+if [ -s /etc/aliases ]; then
+ grep -v '^#' /etc/aliases | grep '|' > $OUT
+ if [ -s "$OUT" ] ; then
+ printf "\nThe following programs are executed in your mail via /etc/aliases (bad!):\n"
+ cat "$OUT"
+ fi
+fi
+