From b87e9a6f140c13e38b4fd41b5a1fdb9f5598a66d Mon Sep 17 00:00:00 2001
From: "thibault.dewailly" <thibault.dewailly@ovh.net>
Date: Thu, 7 Apr 2016 06:56:14 +0200
Subject: [PATCH] 2.18_disable_cramfs.sh

---
 bin/hardening/2.18_disable_cramfs.sh | 57 ++++++++++++++++++++++++++++
 etc/conf.d/2.18_disable_cramfs.cfg   |  2 +
 lib/utils.sh                         | 13 +++++++
 3 files changed, 72 insertions(+)
 create mode 100755 bin/hardening/2.18_disable_cramfs.sh
 create mode 100644 etc/conf.d/2.18_disable_cramfs.cfg

diff --git a/bin/hardening/2.18_disable_cramfs.sh b/bin/hardening/2.18_disable_cramfs.sh
new file mode 100755
index 0000000..e8ceba4
--- /dev/null
+++ b/bin/hardening/2.18_disable_cramfs.sh
@@ -0,0 +1,57 @@
+#!/bin/bash
+
+#
+# CIS Debian 7 Hardening
+#
+
+#
+# Hardening script skeleton replace this line with proper point treated
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# Assumption made : yu have a monolothic kernel with your config zipped in /proc/config.gz
+KERNEL_OPTION="cramfs"
+
+
+# This function will be called if the script status is on enabled / audit mode
+audit () {
+    is_kernel_option_enabled $KERNEL_OPTION
+    if [ $FNRET = 0 ]; then # 0 means true in bash, so it IS activated
+        crit "$KERNEL_OPTION is enabled !"
+    else
+        ok "$KERNEL_OPTION is disabled"
+    fi
+    :
+}
+
+# This function will be called if the script status is on enabled mode
+apply () {
+    is_kernel_option_enabled $KERNEL_OPTION
+    if [ $FNRET = 0 ]; then # 0 means true in bash, so it IS activated
+        warn "I cannot fix $KERNEL_OPTION enabled, recompile your kernel please"
+    else
+        ok "$KERNEL_OPTION is diabled, nothing to do"
+    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
diff --git a/etc/conf.d/2.18_disable_cramfs.cfg b/etc/conf.d/2.18_disable_cramfs.cfg
new file mode 100644
index 0000000..acee522
--- /dev/null
+++ b/etc/conf.d/2.18_disable_cramfs.cfg
@@ -0,0 +1,2 @@
+# Configuration for script of same name
+status=disabled
diff --git a/lib/utils.sh b/lib/utils.sh
index 5a2e081..36e8572 100644
--- a/lib/utils.sh
+++ b/lib/utils.sh
@@ -1,7 +1,20 @@
 # CIS Debian 7 Hardening Utility functions
 
 
+#
+# Kernel Options checks
+#
 
+is_kernel_option_enabled() {
+    local KERNEL_OPTION=$1
+    RESULT=$(zgrep -i $KERNEL_OPTION /proc/config.gz | grep -vE "^#")
+    ANSWER=$(cut -d = -f 2 <<< $RESULT)
+    if [ "x$ANSWER" = "xy" ]; then
+        FNRET=0
+    else
+        FNRET=1
+    fi
+}
 
 #
 # Mounting point manipulation