8.1.1.3_keep_all_audit_logs.sh 8.1.3_audit_bootloader.sh

bin/hardening/8.1.1.3_keep_all_audit_logs.sh

@@ -0,0 +1,88 @@
+#!/bin/bash
+
+#
+# CIS Debian 7 Hardening
+# Authors : Thibault Dewailly, OVH <thibault.dewailly@corp.ovh.com>
+#
+
+#
+# 8.1.1.3 Keep All Auditing Information (Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+FILE='/etc/audit/auditd.conf'
+OPTIONS='max_log_file_action=keep_logs'
+
+# This function will be called if the script status is on enabled / audit mode
+audit () {
+    does_file_exist $FILE
+    if [ $FNRET != 0 ]; then
+        crit "$FILE does not exist"
+    else
+        ok "$FILE exist, checking configuration"
+        for AUDIT_OPTION in $OPTIONS; do
+        AUDIT_PARAM=$(echo $AUDIT_OPTION | cut -d= -f 1)
+        AUDIT_VALUE=$(echo $AUDIT_OPTION | cut -d= -f 2)
+        PATTERN="^$AUDIT_PARAM[[:space:]]*=[[:space:]]*$AUDIT_VALUE"
+        debug "$AUDIT_PARAM must have value $AUDIT_VALUE"
+        does_pattern_exists_in_file $FILE "$PATTERN"
+        if [ $FNRET != 0 ]; then
+            crit "$PATTERN not present in $FILE"
+        else
+            ok "$PATTERN present in $FILE"
+        fi
+        done
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply () {
+    does_file_exist $FILE
+    if [ $FNRET != 0 ]; then
+        warn "$FILE does not exist, creating it"
+        touch $FILE
+    else
+        ok "$FILE exist"
+    fi
+    for AUDIT_OPTION in $OPTIONS; do
+        AUDIT_PARAM=$(echo $AUDIT_OPTION | cut -d= -f 1)
+        AUDIT_VALUE=$(echo $AUDIT_OPTION | cut -d= -f 2)
+        debug "$AUDIT_PARAM must have value $AUDIT_VALUE"
+        PATTERN="^$AUDIT_PARAM[[:space:]]*=[[:space:]]*$AUDIT_VALUE"
+        does_pattern_exists_in_file $FILE "$PATTERN"
+        if [ $FNRET != 0 ]; then
+            warn "$PATTERN not present in $FILE, adding it"
+            does_pattern_exists_in_file $FILE "^$AUDIT_PARAM"
+            if [ $FNRET != 0 ]; then
+                info "Parameter $AUDIT_PARAM seems absent from $FILE, adding at the end" 
+                add_end_of_file $FILE "$AUDIT_PARAM = $AUDIT_VALUE"
+            else
+                info "Parameter $AUDIT_PARAM is present but with the wrong value, correcting"
+                replace_in_file $FILE "^$AUDIT_PARAM[[:space:]]*=.*" "$AUDIT_PARAM = $AUDIT_VALUE"
+            fi
+        else
+            ok "$PATTERN present in $FILE"
+        fi
+    done
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ ! -r /etc/default/cis-hardenning ]; then
+    echo "There is no /etc/default/cis-hardenning file, cannot source CIS_ROOT_DIR variable, aborting"
+    exit 128
+else
+    . /etc/default/cis-hardenning
+    if [ -z $CIS_ROOT_DIR ]; then
+        echo "No CIS_ROOT_DIR variable, aborting"
+    fi
+fi 
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+[ -r $CIS_ROOT_DIR/lib/main.sh ] && . $CIS_ROOT_DIR/lib/main.sh

bin/hardening/8.1.3_audit_bootloader.sh

@@ -0,0 +1,88 @@
+#!/bin/bash
+
+#
+# CIS Debian 7 Hardening
+# Authors : Thibault Dewailly, OVH <thibault.dewailly@corp.ovh.com>
+#
+
+#
+# 8.1.3 Enable Auditing for Processes That Start Prior to auditd (Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+FILE='/etc/default/grub'
+OPTIONS='GRUB_CMDLINE_LINUX="audit=1"'
+
+# This function will be called if the script status is on enabled / audit mode
+audit () {
+    does_file_exist $FILE
+    if [ $FNRET != 0 ]; then
+        crit "$FILE does not exist"
+    else
+        ok "$FILE exist, checking configuration"
+        for GRUB_OPTION in $OPTIONS; do
+        GRUB_PARAM=$(echo $GRUB_OPTION | cut -d= -f 1)
+        GRUB_VALUE=$(echo $GRUB_OPTION | cut -d= -f 2,3)
+        PATTERN="^$GRUB_PARAM=$GRUB_VALUE"
+        debug "$GRUB_PARAM must have value $GRUB_VALUE"
+        does_pattern_exists_in_file $FILE "$PATTERN"
+        if [ $FNRET != 0 ]; then
+            crit "$PATTERN not present in $FILE"
+        else
+            ok "$PATTERN present in $FILE"
+        fi
+        done
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply () {
+    does_file_exist $FILE
+    if [ $FNRET != 0 ]; then
+        warn "$FILE does not exist, creating it"
+        touch $FILE
+    else
+        ok "$FILE exist"
+    fi
+    for GRUB_OPTION in $OPTIONS; do
+        GRUB_PARAM=$(echo $GRUB_OPTION | cut -d= -f 1)
+        GRUB_VALUE=$(echo $GRUB_OPTION | cut -d= -f 2,3)
+        debug "$GRUB_PARAM must have value $GRUB_VALUE"
+        PATTERN="^$GRUB_PARAM=$GRUB_VALUE"
+        does_pattern_exists_in_file $FILE "$PATTERN"
+        if [ $FNRET != 0 ]; then
+            warn "$PATTERN not present in $FILE, adding it"
+            does_pattern_exists_in_file $FILE "^$GRUB_PARAM"
+            if [ $FNRET != 0 ]; then
+                info "Parameter $GRUB_PARAM seems absent from $FILE, adding at the end" 
+                add_end_of_file $FILE "$GRUB_PARAM = $GRUB_VALUE"
+            else
+                info "Parameter $GRUB_PARAM is present but with the wrong value, correcting"
+                replace_in_file $FILE "^$GRUB_PARAM=.*" "$GRUB_PARAM=$GRUB_VALUE"
+            fi
+        else
+            ok "$PATTERN present in $FILE"
+        fi
+    done
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ ! -r /etc/default/cis-hardenning ]; then
+    echo "There is no /etc/default/cis-hardenning file, cannot source CIS_ROOT_DIR variable, aborting"
+    exit 128
+else
+    . /etc/default/cis-hardenning
+    if [ -z $CIS_ROOT_DIR ]; then
+        echo "No CIS_ROOT_DIR variable, aborting"
+    fi
+fi 
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+[ -r $CIS_ROOT_DIR/lib/main.sh ] && . $CIS_ROOT_DIR/lib/main.sh

etc/conf.d/8.1.1.3_keep_all_audit_logs.cfg

@@ -0,0 +1,2 @@
+# Configuration for script of same name
+status=enabled

etc/conf.d/8.1.3_audit_bootloader.cfg

@@ -0,0 +1,2 @@
+# Configuration for script of same name
+status=enabled

lib/utils.sh

@@ -133,6 +133,7 @@ add_line_file_before_pattern() {
     local LINE=$2
     local PATTERN=$3
 
+    backup_file "$1"
     debug "Inserting $LINE before $PATTERN in $FILE"
     debug "sed -i '/$PATTERN/i $LINE' $FILE"
     sed -i "/$PATTERN/i $LINE" $FILE
@@ -144,6 +145,7 @@ replace_in_file() {
     local SOURCE=$2
     local DESTINATION=$3
 
+    backup_file "$1"
     debug "Replacing $SOURCE to $DESTINATION in $FILE"
     debug "sed -i 's/$SOURCE/$DESTINATION/g' $FILE"
     sed -i "s/$SOURCE/$DESTINATION/g" $FILE