94 lines
3.4 KiB
Bash
Executable File
94 lines
3.4 KiB
Bash
Executable File
#!/bin/bash
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#
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# harbian-audit for Debian GNU/Linux 9/10 or CentOS Hardening
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#
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#
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# 8.1.1.9 Set space left for auditd service (Scored)
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# If the value of the "space_left" keyword is set to more than 25 percent of the total partition size, this is a finding.
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# Author : Samson wen, Samson <sccxboy@gmail.com>
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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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HARDENING_LEVEL=4
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FILE='/etc/audit/auditd.conf'
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PATTERN='space_left'
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LOGFILESYSTEM='/var/log/audit/'
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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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does_file_exist $FILE
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if [ $FNRET != 0 ]; then
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crit "$FILE does not exist"
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FNRET=1
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else
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if [ -d $LOGFILESYSTEM ]; then
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ok "$FILE exists, checking configuration"
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DISKSIZE=$(df -B 1m $LOGFILESYSTEM | grep -v "Filesystem" | awk '{printf $2}')
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LEFTSIZE=$(bc <<<${DISKSIZE}*0.25 | awk '{print int($1)}')
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if [ $(grep "^space_left.=.*" $FILE | awk '{printf $3}' | wc -c) -eq 0 ]; then
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crit "$PATTERN is not configure in the $FILE."
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FNRET=3
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else
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SETSIZE=$(grep "^space_left.=.*" $FILE | awk '{printf $3}')
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if [ "${SETSIZE}" -gt "${LEFTSIZE}" ]; then
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crit "Space left value: ${SETSIZE} is more than audit log filesystem 25%"
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FNRET=4
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else
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ok "Space left value: ${SETSIZE} is less than/equal to audit log filesystem 25%"
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FNRET=0
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fi
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fi
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else
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crit "$LOGFILESYSTEM is not present"
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FNRET=2
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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 [ $FNRET = 0 ]; then
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ok "$PATTERN is present in $FILE."
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elif [ $FNRET = 1 -o $FNRET = 2 ]; then
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warn "$FILE is not exist, please manual check."
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elif [ $FNRET = 3 ]; then
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warn "$PATTERN value not exist in $FILE, add it"
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DISKSIZE=$(df -B 1m $LOGFILESYSTEM | grep -v "Filesystem" | awk '{printf $2}')
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LEFTSIZE=$(bc <<<${DISKSIZE}*0.25) | awk '{print int($1)}'
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add_end_of_file $FILE "${PATTERN} = $LEFTSIZE"
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elif [ $FNRET = 4 ]; then
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warn "$PATTERN value is incorrect in $FILE, reset it"
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DISKSIZE=$(df -B 1m $LOGFILESYSTEM | grep -v "Filesystem" | awk '{printf $2}')
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LEFTSIZE=$(bc <<<${DISKSIZE}*0.25) | awk '{print int($1)}'
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replace_in_file $FILE "^${PATTERN}[[:space:]].*" "${PATTERN} = $LEFTSIZE"
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fi
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}
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# This function will check config parameters required
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check_config() {
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:
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}
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# Source Root Dir Parameter
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if [ -r /etc/default/cis-hardening ]; then
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. /etc/default/cis-hardening
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fi
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if [ -z "$CIS_ROOT_DIR" ]; then
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echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
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echo "Cannot source CIS_ROOT_DIR variable, aborting."
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exit 128
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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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if [ -r $CIS_ROOT_DIR/lib/main.sh ]; then
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. $CIS_ROOT_DIR/lib/main.sh
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else
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echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_ROOT_DIR in /etc/default/cis-hardening"
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exit 128
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fi
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