Many cron security check added.

Now report what it does ( msec ).

1 files changed, 183 insertions, 101 deletions

diff --git a/cron-sh/file_check.sh b/cron-sh/file_check.sh
index 5118ebc..7886387 100755
--- a/cron-sh/file_check.sh
+++ b/cron-sh/file_check.sh
@@ -24,38 +24,53 @@ FILTERS="$CS_TYPES|$CS_DEVS|$CS_DIRS"
 DIR=`mount | grep -vE "$FILTERS" | cut -d ' ' -f3`
 ###
 
-SUID_ROOT_TODAY="/var/log/security/suid_root.today"
-SUID_ROOT_YESTERDAY="/var/log/security/suid_root.yesterday"
-SUID_ROOT_DIFF="/var/log/security/suid_root.diff"
-SUID_GROUP_TODAY="/var/log/security/suid_group.today"
-SUID_GROUP_YESTERDAY="/var/log/security/suid_group.yesterday"
-SUID_GROUP_DIFF="/var/log/security/suid_group.diff"
+SUID_ROOT_TODAY=/var/log/security/suid_root.today
+SUID_ROOT_YESTERDAY=/var/log/security/suid_root.yesterday
+SUID_ROOT_DIFF=/var/log/security/suid_root.diff
+SUID_GROUP_TODAY=/var/log/security/suid_group.today
+SUID_GROUP_YESTERDAY=/var/log/security/suid_group.yesterday
+SUID_GROUP_DIFF=/var/log/security/suid_group.diff
 WRITABLE_TODAY=/var/log/security/writable.today
 WRITABLE_YESTERDAY=/var/log/security/writable.yesterday
 WRITABLE_DIFF=/var/log/security/writable.diff
 UNOWNED_TODAY=/var/log/security/unowned.today
 UNOWNED_YESTERDAY=/var/log/security/unowned.yesterday
 UNOWNED_DIFF=/var/log/security/unowned.diff
-
+PASSWD_TODAY=/var/log/security/passwd.today
+PASSWD_YESTERDAY=/var/log/security/passwd.yesterday
+PASSWD_DIFF=/var/log/security/passwd.diff
+SHADOW_TODAY=/var/log/security/shadow.today
+SHADOW_YESTERDAY=/var/log/security/shadow.yesterday
+SHADOW_DIFF=/var/log/security/shadow.diff
+HOST_TODAY=/var/log/security/hosts.today
+HOST_YESTERDAY=/var/log/security/hosts.yesterday
+HOST_DIFF=/var/log/security/hosts.diff
+SUID_MD5_TODAY=/var/log/security/suid_md5.today
+SUID_MD5_YESTERDAY=/var/log/security/suid_md5.yesterday
+SUID_MD5_DIFF=/var/log/security/suid_md5.diff
+OPEN_PORT_TODAY=/var/log/security/open_port.today
+OPEN_PORT_YESTERDAY=/var/log/security/open_port.yesterday
+OPEN_PORT_DIFF=/var/log/security/open_port.diff
 
 if [ ! -d /var/log/security ]; then
     mkdir /var/log/security
 fi
 
-chattr -a /var/log/security
+chattr -a /var/log/security/
+chattr -a /var/log/security/*
 
 ### Functions ###
 
 Syslog() {
 	if [ $SYS_LOG=="yes" ]; then
-		/sbin/initlog --string=$1
+		/sbin/initlog --string="$1"
 	fi
 }
 
 Ttylog() {
 	if [ $TTY_LOG=="yes" ]; then
 		for i in `w | grep -v "load\|TTY" | awk '{print $2}'` ; do
-			echo -e $1 > /dev/$i
+			echo -e "$1" > /dev/$i
 		done
 	fi
 }
@@ -65,124 +80,191 @@ Ttylog() {
 
 ### New Suid root file detection ###
 if [ $CHECK_SUID_ROOT=="yes" ]; then
-	if [ -f $SUID_ROOT_TODAY ]; then
-	    mv $SUID_ROOT_TODAY $SUID_ROOT_YESTERDAY
-	fi
-
-	find $DIR -xdev -type f -perm +04000 -user root \
-   		-printf "%8i %5m %3n %-10u %-10g %9s %t %h/%f\n" | sort > $SUID_ROOT_TODAY
-
-	if [ -f $SUID_ROOT_YESTERDAY ]; then
-    	if ! diff $SUID_ROOT_YESTERDAY $SUID_ROOT_TODAY > $SUID_ROOT_DIFF; then
-			Syslog "Change in Suid Root file found, please consult $SUID_ROOT_DIFF"
-        	Ttylog "\\033[1;31mChange in Suid Root file found !\\033[0;39m"
-        	Ttylog "\\033[1;31mPlease consult $SUID_ROOT_DIFF\\033[0;39m"
-    	fi
+    if [ -f $SUID_ROOT_TODAY ]; then
+	mv $SUID_ROOT_TODAY $SUID_ROOT_YESTERDAY
+    fi
+
+    find $DIR -xdev -type f -perm +04000 -user root \
+	-printf "%8i %5m %3n %-10u %-10g %9s %t %h/%f\n" | sort > $SUID_ROOT_TODAY
+
+    if [ -f $SUID_ROOT_YESTERDAY ]; then
+	if ! diff $SUID_ROOT_YESTERDAY $SUID_ROOT_TODAY > $SUID_ROOT_DIFF; then
+	    Syslog "Change in Suid Root file found, please consult $SUID_ROOT_DIFF"
+	    Ttylog "\\033[1;31mChange in Suid Root file found !\\033[0;39m"
+	    Ttylog "\\033[1;31mPlease consult $SUID_ROOT_DIFF\\033[0;39m"
 	fi
+    fi
 fi
 #############################
 
 
 ### New Suid group file detection ###
 if [ $CHECK_SUID_GROUP ]; then
-	if [ -f $SUID_GROUP_TODAY ]; then
-		mv $SUID_GROUP_TODAY $SUID_GROUP_YESTERDAY
-	fi
-
-	find $DIR -xdev -type f -perm +02000 \
-   		 -printf "%8i %5m %3n %-10u %-10g %9s %t %h/%f\n" | sort > $SUID_GROUP_TODAY
-
-	if [ -f $SUID_GROUP_YESTERDAY ]; then
-		if ! diff $SUID_GROUP_YESTERDAY $SUID_GROUP_TODAY > $SUID_GROUP_DIFF; then
-			Syslog "Change in Suid Group file found, please consult $SUID_GROUP_DIFF"
-			Ttylog "\\033[1;31mChange in Suid Group file found !\\033[0;39m"
-			Ttylog "\\033[1;31mPlease consult $SUID_GROUP_DIFF\\033[0;39m"
-		fi
+    if [ -f $SUID_GROUP_TODAY ]; then
+	mv $SUID_GROUP_TODAY $SUID_GROUP_YESTERDAY
+    fi
+
+    find $DIR -xdev -type f -perm +02000 \
+	-printf "%8i %5m %3n %-10u %-10g %9s %t %h/%f\n" | sort > $SUID_GROUP_TODAY
+
+    if [ -f $SUID_GROUP_YESTERDAY ]; then
+	if ! diff $SUID_GROUP_YESTERDAY $SUID_GROUP_TODAY > $SUID_GROUP_DIFF; then
+	    Syslog "Change in Suid Group file found, please consult $SUID_GROUP_DIFF"
+	    Ttylog "\\033[1;31mChange in Suid Group file found !\\033[0;39m"
+	    Ttylog "\\033[1;31mPlease consult $SUID_GROUP_DIFF\\033[0;39m"
 	fi
+    fi
 fi
 #############################
 
 ### Writable file detection ###
 
 if [ $CHECK_WRITABLE=="yes" ]; then
-	if [ -f $WRITABLE_TODAY ]; then
-		mv $WRITABLE_TODAY $WRITABLE_YESTERDAY
-	fi
-
-	find $DIR -xdev -type f -perm -2 \
-		-ls -print | sort > $WRITABLE_TODAY
-
-	if [ -f $WRITABLE_YESTERDAY ]; then
-		if ! diff $WRITABLE_YESTERDAY $WRITABLE_TODAY > $WRITABLE_DIFF; then
-			Syslog "Change in World Writable File found, please consult $WRITABLE_DIFF"
-			Ttylog "\\033[1;31mChange in World Writable File found !\\033[0;39m"
-			Ttylog "\\033[1;31mPlease consult $WRITABLE_DIFF\\033[0;39m"	
-		fi
+    if [ -f $WRITABLE_TODAY ]; then
+	mv $WRITABLE_TODAY $WRITABLE_YESTERDAY
+    fi
+
+    find $DIR -xdev -type f -perm -2 \
+	-ls -print | sort > $WRITABLE_TODAY
+
+    if [ -f $WRITABLE_YESTERDAY ]; then
+	if ! diff $WRITABLE_YESTERDAY $WRITABLE_TODAY > $WRITABLE_DIFF; then
+	    Syslog "Change in World Writable File found, please consult $WRITABLE_DIFF"
+	    Ttylog "\\033[1;31mChange in World Writable File found !\\033[0;39m"
+	    Ttylog "\\033[1;31mPlease consult $WRITABLE_DIFF\\033[0;39m"	
 	fi
+    fi
 fi
 #################################
 
 ### Search Un Owned file ###
 if [ $CHECK_UNOWNED=="yes" ]; then
-	if [ -f $UNOWNED_TODAY ]; then
-			mv $UNOWNED_TODAY $UNOWNED_YESTERDAY
+    if [ -f $UNOWNED_TODAY ]; then
+	mv $UNOWNED_TODAY $UNOWNED_YESTERDAY
+    fi
+
+    find $DIR -xdev -nouser -o -nogroup -print \
+	-ls | sort > $UNOWNED_TODAY
+
+    if [ -f $UNOWNED_YESTERDAY ]; then
+	if ! diff $UNOWNED_YESTERDAY $UNOWNED_TODAY; then
+	    Syslog "Change in Un-Owned file user/group, please consult $UNOWNED_DIFF"
+	    Ttylog "\\033[1;31mChange in Un-Owned file user/group found !\\033[0;39m"
+	    Ttylog "\\033[1;31mPlease consult $UNOWNED_DIFF\\033[0;39m"
 	fi
+    fi
+fi
 
-	find $DIR -xdev -nouser -o -nogroup -print \
-		-ls | sort > $UNOWNED_TODAY
+########## Md5 check for SUID root file #########
+if [ ${CHECK_SUID_MD5}=="yes" ]; then 
+    if [ -f ${SUID_MD5_TODAY} ]; then
+	mv ${SUID_MD5_TODAY} ${SUID_MD5_YESTERDAY}
+    fi
+
+    touch ${SUID_MD5_TODAY}
+    awk '{print $12}' ${SUID_ROOT_TODAY} |
+	while read line; do 
+	    md5sum ${line} >> ${SUID_MD5_TODAY}
+	done
+	
+    if [ -f ${SUID_MD5_YESTERDAY} ]; then
+	if ! diff ${SUID_MD5_YESTERDAY} ${SUID_MD5_TODAY} 1> ${SUID_MD5_DIFF}; then
+	    Syslog "Warning, the md5 checksum for one of your SUID files has changed..."
+	    Syslog "Maybe an intruder modified one of these suid binary in order to put in a backdoor..."
+	    Syslog "Please consult  ${SUID_MD5_DIFF}."
+	    Ttylog "Warning, the md5 checksum for one of your SUID files has changed..."
+	    Ttylog "Maybe an intruder modified one of these suid binary in order to put in a backdoor..."
+	    Ttylog "Please consult  ${SUID_MD5_DIFF}."
+	fi
+    fi
+fi
+##################################################
+
+#### Passwd check ####
+if [ ${CHECK_PASSWD}=="yes" ]; then
+    if [ -f ${PASSWD_TODAY} ]; then
+	mv ${PASSWD_TODAY} ${PASSWD_YESTERDAY};
+    fi
+    
+    awk -F: '{
+	if ( $2 == "" )
+	    printf("/etc/passwd:%d: User \"%s\" has no password !\n", FNR, $1);
+	else if ($2 !~ /^[x*!]+$/)
+	    printf("/etc/passwd:%d: User \"%s\" has a real password (it is not shadowed).\n", FNR, $1);
+    }' < /etc/passwd > ${PASSWD_TODAY}
+    
+    if [ -f ${PASSWD_YESTERDAY} ]; then
+	if ! diff ${PASSWD_YESTERDAY} ${PASSWD_TODAY} 1> ${PASSWD_DIFF}; then
+	    Syslog `cat ${PASSWD_DIFF}`
+	    Ttylog `cat ${PASSWD_DIFF}`
+	fi
+    fi
+fi
+######################
+
+#### Shadow Check ####
+if [ ${CHECK_SHADOW}=="yes" ]; then
+    if [ -f ${SHADOW_TODAY} ]; then
+	mv -f ${SHADOW_TODAY} ${SHADOW_YESTERDAY};
+    fi
+
+    awk -F: '{
+	if ( $2 == "" )
+	    printf("/etc/shadow:%d: User \"%s\" has no password !\n", FNR, $1);
+    }' < /etc/shadow > ${SHADOW_TODAY}
+
+    if [ -f ${SHADOW_YESTERDAY} ]; then
+	if ! diff ${SHADOW_YESTERDAY} ${SHADOW_TODAY} 1> ${SHADOW_DIFF}; then
+	    Syslog `cat ${SHADOW_DIFF}`
+	    Ttylog `cat ${SHADOW_DIFF}`
+	fi
+    fi
+fi
 
-	if [ -f $UNOWNED_YESTERDAY ]; then
-		if ! diff $UNOWNED_YESTERDAY $UNOWNED_TODAY; then
-			Syslog "Change in Un-Owned file user/group, please consult $UNOWNED_DIFF"
-			Ttylog "\\033[1;31mChange in Un-Owned file user/group found !\\033[0;39m"
-			Ttylog "\\033[1;31mPlease consult $UNOWNED_DIFF\\033[0;39m"
+#### .[sr]hosts check ####
+if [ ${CHECK_RHOST}=="yes" ]; then
+    if [ -f ${HOST_TODAY} ]; then
+	mv -f ${HOST_TODAY} ${HOST_YESTERDAY};
+    fi
+    
+    awk -F: '{print $1" "$6}' /etc/passwd |
+	while read username homedir; do
+	    for file in .rhosts .shosts; do
+		if [ -s ${homedir}/${file} ] ; then
+		    rhost=`ls -lcdg ${homedir}/${file}`
+		    printf "${username}: ${rhost}\n"
+		    if grep "+" ${homedir}/${file} > /dev/null ; then
+			printf "\tThere is a (+) character in ${file} : this is a *big* security problem \!\n"
+		    fi
 		fi
+	    done
+	done > ${HOST_TODAY}
+	
+    if [ -f ${HOST_YESTERDAY} ]; then
+	if ! diff ${HOST_YESTERDAY} ${HOST_TODAY} 1> ${HOST_DIFF}; then
+	    Syslog `cat ${HOST_DIFF}`
+	    Ttylog `cat ${HOST_DIFF}`
 	fi
+    fi
 fi
 
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-chattr +a /var/log/security
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+### Network check ###
+if [ ${CHECK_OPEN_PORT}=="yes" ]; then
+    if [ -f ${OPEN_PORT_TODAY} ]; then
+	mv -f ${OPEN_PORT_TODAY} ${OPEN_PORT_YESTERDAY}
+    fi
+
+    netstat -pvlA inet > ${OPEN_PORT_TODAY};
+    
+    if [ -f ${OPEN_PORT_YESTERDAY} ]; then
+	if ! diff ${OPEN_PORT_YESTERDAY} ${OPEN_PORT_TODAY} 1> ${OPEN_PORT_DIFF}; then
+	    Syslog "There is a new port listening on your machine..."
+	    Syslog "Please consult ${OPEN_PORT_DIFF} for security purpose..."
+	    Ttylog "There is a new port listening on your machine..."
+	    Ttylog "Please consult ${OPEN_PORT_DIFF} for security purpose..."
+        fi
+    fi
+fi