debian-cis/bin/hardening/2.13_removable_device_nosuid.sh

#!/bin/bash

#
# CIS Debian 7/8 Hardening
#

#
# 2.13 Add nosuid Option to Removable Media Partitions (Not Scored)
#

set -e # One error, it's over
set -u # One variable unset, it's over

# Fair warning, it only checks /media.* like partition in fstab, it's not exhaustive

# Quick factoring as many script use the same logic
PARTITION="/media\S*"
OPTION="nosuid"

# This function will be called if the script status is on enabled / audit mode
audit () {
    info "Verifying if there is $PARTITION like partition"
    FNRET=0
    is_a_partition "$PARTITION"
    if [ $FNRET -gt 0 ]; then
        ok "There is no partition like $PARTITION"
        FNRET=0
    else
        info "detected $PARTITION like"
        has_mount_option $PARTITION $OPTION
        if [ $FNRET -gt 0 ]; then
            crit "$PARTITION has no option $OPTION in fstab!"
            FNRET=1
        else
            ok "$PARTITION has $OPTION in fstab"
        fi       
    fi
}

# This function will be called if the script status is on enabled mode
apply () {
    if [ $FNRET = 0 ]; then
        ok "$PARTITION is correctly set"
    elif [ $FNRET = 1 ]; then
        info "Adding $OPTION to fstab"
        add_option_to_fstab $PARTITION $OPTION
    fi 
}

# This function will check config parameters required
check_config() {
    # No param for this script
    :
}

# Source Root Dir Parameter
if [ ! -r /etc/default/cis-hardening ]; then
    echo "There is no /etc/default/cis-hardening file, cannot source CIS_ROOT_DIR variable, aborting"
    exit 128
else
    . /etc/default/cis-hardening
    if [ -z ${CIS_ROOT_DIR:-} ]; then
        echo "No CIS_ROOT_DIR variable, aborting"
        exit 128
    fi
fi 

# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
    . $CIS_ROOT_DIR/lib/main.sh
else
    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
    exit 128
fi