7.1.1_disable_ip_forwarding.sh 7.1.2_disable_send_packet_redirects.sh

bin/hardening/7.1.1_disable_ip_forwarding.sh

@@ -0,0 +1,61 @@
+#!/bin/bash
+
+#
+# CIS Debian 7 Hardening
+# Authors : Thibault Dewailly, OVH <thibault.dewailly@corp.ovh.com>
+#
+
+#
+# 7.1.1 Disable IP Forwarding (Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+SYSCTL_PARAM='net.ipv4.ip_forward'
+SYSCTL_EXP_RESULT=0
+
+# This function will be called if the script status is on enabled / audit mode
+audit () {
+    has_sysctl_param_expected_result $SYSCTL_PARAM $SYSCTL_EXP_RESULT
+    if [ $FNRET != 0 ]; then
+        crit "$SYSCTL_PARAM has not $SYSCTL_EXP_RESULT value !"
+    elif [ $FNRET = 255 ]; then
+        warn "$SYSCTL_PARAM does not exist, typo ?"
+    else
+        ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT"
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply () {
+    has_sysctl_param_expected_result $SYSCTL_PARAM $SYSCTL_EXP_RESULT
+    if [ $FNRET != 0 ]; then
+        warn "$SYSCTL_PARAM has not $SYSCTL_EXP_RESULT value, correcting it"
+        set_sysctl_param $SYSCTL_PARAM $SYSCTL_EXP_RESULT
+        sysctl -w net.ipv4.route.flush=1 > /dev/null
+    elif [ $FNRET = 255 ]; then
+        warn "$SYSCTL_PARAM does not exist, typo ?"
+    else
+        ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT"
+    fi
+}
+
+# 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/7.1.2_disable_send_packet_redirects.sh

@@ -0,0 +1,71 @@
+#!/bin/bash
+
+#
+# CIS Debian 7 Hardening
+# Authors : Thibault Dewailly, OVH <thibault.dewailly@corp.ovh.com>
+#
+
+#
+# 7.1.2 Disable Send Packet Redirects (Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+#net.ipv4.conf.all.send_redirects = 0
+#net.ipv4.conf.default.send_redirects = 0
+SYSCTL_PARAMS='net.ipv4.conf.all.send_redirects=0 net.ipv4.conf.default.send_redirects=0'
+
+# This function will be called if the script status is on enabled / audit mode
+audit () {
+    for SYSCTL_VALUES in $SYSCTL_PARAMS; do
+        SYSCTL_PARAM=$(echo $SYSCTL_VALUES | cut -d= -f 1)
+        SYSCTL_EXP_RESULT=$(echo $SYSCTL_VALUES | cut -d= -f 2)
+        debug "$SYSCTL_PARAM must have $SYSCTL_EXP_RESULT"
+        has_sysctl_param_expected_result $SYSCTL_PARAM $SYSCTL_EXP_RESULT
+        if [ $FNRET != 0 ]; then
+            crit "$SYSCTL_PARAM has not $SYSCTL_EXP_RESULT value !"
+        elif [ $FNRET = 255 ]; then
+            warn "$SYSCTL_PARAM does not exist, typo ?"
+        else
+            ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT"
+        fi
+    done
+}
+
+# This function will be called if the script status is on enabled mode
+apply () {
+    for SYSCTL_VALUES in $SYSCTL_PARAMS; do
+        SYSCTL_PARAM=$(echo $SYSCTL_VALUES | cut -d= -f 1)
+        SYSCTL_EXP_RESULT=$(echo $SYSCTL_VALUES | cut -d= -f 2)
+        debug "$SYSCTL_PARAM must have $SYSCTL_EXP_RESULT"
+        has_sysctl_param_expected_result $SYSCTL_PARAM $SYSCTL_EXP_RESULT
+        if [ $FNRET != 0 ]; then
+            warn "$SYSCTL_PARAM has not $SYSCTL_EXP_RESULT value, correcting it"
+            set_sysctl_param $SYSCTL_PARAM $SYSCTL_EXP_RESULT
+            sysctl -w net.ipv4.route.flush=1 > /dev/null
+        elif [ $FNRET = 255 ]; then
+            warn "$SYSCTL_PARAM does not exist, typo ?"
+        else
+            ok "$SYSCTL_PARAM correctly set to $SYSCTL_EXP_RESULT"
+        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/7.1.1_disable_ip_forwarding.cfg

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

etc/conf.d/7.1.2_disable_send_packet_redirects.cfg

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

lib/utils.sh

@@ -25,7 +25,7 @@ set_sysctl_param() {
     debug "Setting $SYSCTL_PARAM to $VALUE"
     if [ "$(sysctl -w $SYSCTL_PARAM=$VALUE 2>/dev/null)" = "$SYSCTL_PARAM = $VALUE" ]; then
         FNRET=0
-    elif [ $? != 0 ]; then
+    elif [ $? = 255 ]; then
         debug "$SYSCTL_PARAM does not exist"
         FNRET=255
     else