mirror of https://github.com/ovh/debian-cis.git
2.2_tmp_nodev.sh
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thibault.dewailly
parent
5effa3335e
commit
b079798e62
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#!/bin/bash
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#
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# CIS Debian 7 Hardening
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#
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#
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# 2.2 Set nodev option for /tmp Partition (Scored)
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#
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set -e # One error, it's over
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set -u # One variable unset, it's over
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# Quick factoring as many script use the same logic
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PARTITION="/tmp"
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OPTION="nodev"
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# This function will be called if the script status is on enabled / audit mode
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audit () {
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info "Verifying that $PARTITION is a partition"
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FNRET=0
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is_a_partition "$PARTITION"
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if [ $FNRET -gt 0 ]; then
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crit "$PARTITION is not a partition"
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FNRET=2
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else
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ok "$PARTITION is a partition"
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has_mount_option $PARTITION $OPTION
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if [ $FNRET -gt 0 ]; then
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crit "$PARTITION have no option $OPTION in fstab !"
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FNRET=1
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else
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ok "$PARTITION have $OPTION in fstab"
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has_mounted_option $PARTITION $OPTION
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if [ $FNRET -gt 0 ]; then
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warn "$PARTITION is not mounted with $OPTION at runtime"
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FNRET=3
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else
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ok "$PARTITION mounted with $OPTION"
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fi
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fi
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fi
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}
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# This function will be called if the script status is on enabled mode
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apply () {
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if [ $FNRET = 0 ]; then
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ok "$PARTITION is correctly set"
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elif [ $FNRET = 2 ]; then
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crit "$PARTITION is not a partition, correct this by yourself, I cannot help you here"
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elif [ $FNRET = 1 ]; then
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info "Adding $OPTION to fstab"
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add_option_to_fstab $PARTITION $OPTION
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info "Remounting $PARTITION from fstab"
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remount_partition $PARTITION
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elif [ $FNRET = 3 ]; then
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info "Remounting $PARTITION from fstab"
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remount_partition $PARTITION
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fi
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}
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# This function will check config parameters required
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check_config() {
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# No param for this script
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:
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}
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# Source Root Dir Parameter
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if [ ! -r /etc/default/cis-hardenning ]; then
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echo "There is no /etc/default/cis-hardenning file, cannot source CIS_ROOT_DIR variable, aborting"
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exit 128
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else
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. /etc/default/cis-hardenning
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if [ -z $CIS_ROOT_DIR ]; then
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echo "No CIS_ROOT_DIR variable, aborting"
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fi
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fi
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# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
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[ -r $CIS_ROOT_DIR/lib/main.sh ] && . $CIS_ROOT_DIR/lib/main.sh
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@ -0,0 +1,2 @@
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# Configuration for script of same name
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status=disabled
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@ -3,3 +3,7 @@
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# Valid values are debug info warning error
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LOGLEVEL=debug
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# Backup directory, every file touched by hardennign will be backuped here, with versionning
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# Means that if a file is modified more than once during the process, you will have hardening step diffs in the folder
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BACKUPDIR="$CIS_ROOT_DIR/tmp/backups"
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@ -1,6 +1,26 @@
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# CIS Debian 7 Hardening common functions
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#
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# File Backup functions
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#
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backup_file() {
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FILE=$1
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if [ ! -f $FILE ]; then
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crit "Cannot backup $FILE, it's not a file"
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FNRET=1
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else
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TARGET=$(echo $FILE | sed -s 's/\//./g' | sed -s 's/^.//' | sed -s "s/$/.$(date +%F-%T)/" )
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TARGET="$BACKUPDIR/$TARGET"
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debug "Backuping $FILE to $TARGET"
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cp -a $FILE $TARGET
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FNRET=0
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fi
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}
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#
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# Logging functions
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#
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case $LOGLEVEL in
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error )
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@ -1,23 +1,9 @@
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# Defines constants for CIS Debian 7 Hardening
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#
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# Script and shell commands homogeneity
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export LANG=C
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#### Useful Colot constants settings for loglevels
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#### Useful Color constants settings for loglevels
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# Reset Color (for syslog)
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NC='\033[0m'
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86
lib/utils.sh
86
lib/utils.sh
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@ -2,40 +2,85 @@
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#
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# Return if a package is installed
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# @param $1 package name
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#
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is_installed()
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{
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PKG_NAME=$1
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if `dpkg -s $PKG_NAME 2> /dev/null | grep -q '^Status: install '` ; then
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return 0
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fi
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return 1
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}
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#
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# Mounting point manipulation
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#
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# Verify $1 is a partition declared in fstab
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is_a_partition() {
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local PARTITION_NAME=$1
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FNRET=128
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if $(grep "[[:space:]]$1[[:space:]]" /etc/fstab | grep -vqE "^#"); then
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debug "$PARTITION found in fstab"
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FNRET=0
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else
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debug "Unable to find $PARTITION in fstab"
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FNRET=1
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fi
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}
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# Verify that $1 is mounted at runtime
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is_mounted() {
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local PARTITION_NAME=$1
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if $(grep -q "[[:space:]]$1[[:space:]]" /proc/mounts); then
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debug "$PARTITION found in /proc/mounts, it's mounted"
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FNRET=0
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else
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debug "Unable to find $PARTITION in /proc/mounts"
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FNRET=1
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fi
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}
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# contains helper functions to work with apt
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# Verify $1 has the proper option $2 in fstab
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has_mount_option() {
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local PARTITION=$1
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local OPTION=$2
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if $(grep "[[:space:]]$1[[:space:]]" /etc/fstab | grep -vE "^#" | awk {'print $4'} | grep -q "$2"); then
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debug "$OPTION has been detected in fstab for partition $PARTITION"
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FNRET=0
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else
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debug "Unable to find $OPTION in fstab for partition $PARTITION"
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FNRET=1
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fi
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}
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# Verify $1 has the proper option $2 at runtime
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has_mounted_option() {
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local PARTITION=$1
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local OPTION=$2
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if $(grep "[[:space:]]$1[[:space:]]" /proc/mounts | awk {'print $4'} | grep -q "$2"); then
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debug "$OPTION has been detected in /proc/mounts for partition $PARTITION"
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FNRET=0
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else
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debug "Unable to find $OPTION in /proc/mounts for partition $PARTITION"
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FNRET=1
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fi
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}
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# Setup mount option in fstab
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add_option_to_fstab() {
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local PARTITION=$1
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local OPTION=$2
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debug "Setting $OPTION for $PARTITION in fstab"
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backup_file "/etc/fstab"
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# For example :
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# /dev/sda9 /home ext4 auto,acl,errors=remount-ro 0 2
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# /dev/sda9 /home ext4 auto,acl,errors=remount-ro,nodev 0 2
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debug "Sed command : sed -ie \"s;\(.*\)\(\s*\)\s\($PARTITION\)\s\(\s*\)\(\w*\)\(\s*\)\(\w*\)*;\1\2 \3 \4\5\6\7,$OPTION;\" /etc/fstab"
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sed -ie "s;\(.*\)\(\s*\)\s\($PARTITION\)\s\(\s*\)\(\w*\)\(\s*\)\(\w*\)*;\1\2 \3 \4\5\6\7,$OPTION;" /etc/fstab
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}
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remount_partition() {
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local PARTITION=$1
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debug "Remounting $PARTITION"
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mount -o remount $PARTITION
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}
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#
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# Helper functions to work with apt
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#
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apt_update_if_needed()
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{
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@ -57,7 +102,7 @@ apt_check_updates()
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{
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local NAME="$1"
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local DETAILS="/dev/shm/${NAME}"
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LANGUAGE=C apt-get upgrade -s 2>/dev/null | grep -E "^Inst" > $DETAILS || :
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apt-get upgrade -s 2>/dev/null | grep -E "^Inst" > $DETAILS || :
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local COUNT=$(wc -l < "$DETAILS")
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FNRET=128 # Unknown function return result
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RESULT="" # Result output for upgrade
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fi
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rm $DETAILS
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}
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#
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# Returns if a package is installed
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#
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is_installed()
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{
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PKG_NAME=$1
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if `dpkg -s $PKG_NAME 2> /dev/null | grep -q '^Status: install '` ; then
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FNRET=0
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fi
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FNRET=1
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}
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@ -0,0 +1,2 @@
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# Ignore everything, this is a place holder for the git
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*
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