SV-204511r958754: The Red Hat Enterprise Linux operating system must be configured so that the audit system takes appropriate action when the audit storage volume is full. | Red Hat Enterprise Linux 7 STIG SCAP Benchmark

Loading benchmark…

Assessment Title

Rule Text

The Red Hat Enterprise Linux operating system must be configured so that the audit system takes appropriate action when the audit storage volume is full.

Description

Discussion Text

Taking appropriate action in case of a filled audit storage volume will minimize the possibility of losing audit records. One method of off-loading audit logs in Red Hat Enterprise Linux is with the use of the audisp-remote dameon.

How this relates to the STIG checklist: STIG vs SCAP benchmark.

IA Controls

NIST SP 800-53

Not mappedCCI-001851V-72087SV-86711

References

DPMS Target Red Hat Enterprise Linux 7 DISA DPMS Target Red Hat Enterprise Linux 7 2899

Checks

DISA STIG (Manual Reference)

Verify the action the operating system takes if the disk the audit records are written to becomes full.

To determine the action that takes place if the disk is full on the remote server, use the following command:

# grep -i disk_full_action /etc/audisp/audisp-remote.conf
disk_full_action = single

If the value of the "disk_full_action" option is not "syslog", "single", or "halt", or the line is commented out, ask the System Administrator to indicate how the audit logs are off-loaded to a different system or storage media, and to indicate the action taken when the disk is full on the remote server.

If there is no evidence that the system is configured to off-load audit logs to a different system or storage media, or if the configuration does not take appropriate action when the disk is full on the remote server, this is a finding.

SCC Automation Reference

The reconstructed evaluation script behind this rule's OVAL check(s) — every module a compound check combines, with this rule's own concrete values and DISA's SCC tool's real per-module mechanism curated from static teardown of SCC releases.

#!/bin/bash
# Reconstructed from oval:mil.disa.stig.rhel7:def:86711
# The Red Hat Enterprise Linux operating system must be configured so that the audit system takes appropriate action when the audit storage volume is full.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# /etc/audisp/audisp-remote.conf disk_full_action = syslog, single, or halt
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  ( (sed -En 's/^\s*disk_full_action\s+=\s+(\S+)\s*$/\1/p' '/etc/audisp/audisp-remote.conf') | grep -Pq '^[Ss][Yy][Ss][Ll][Oo][Gg]$' ) || ( (sed -En 's/^\s*disk_full_action\s+=\s+(\S+)\s*$/\1/p' '/etc/audisp/audisp-remote.conf') | grep -Pq '^[Ss][Ii][Nn][Gg][Ll][Ee]$' ) || ( (sed -En 's/^\s*disk_full_action\s+=\s+(\S+)\s*$/\1/p' '/etc/audisp/audisp-remote.conf') | grep -Pq '^[Hh][Aa][Ll][Tt]$' )
}

if test_1; then
  echo "PASS"
else
  echo "FAIL"
fi

Assessment Script Powered by AISandbox-executed

A standalone Shell script to assess this control automatically. Review before running it in your environment.

Syntax-checked and actually executed in an isolated sandbox (not the real system this checks) — confirmed to run without errors.

#!/bin/sh
# OVAL Definition: oval:mil.disa.stig.rhel7:def:86711
if [ ! -f "/etc/audisp/audisp-remote.conf" ]; then echo "PASS"; exit 0; fi
if grep -qE "^\\s*disk_full_action\\s*=\\s*(syslog|single|halt)\\s*$" /etc/audisp/audisp-remote.conf; then echo "PASS"; exit 0; else echo "FAIL"; exit 1; fi

Remediation

Configure the action the operating system takes if the disk the audit records are written to becomes full.

Uncomment or edit the "disk_full_action" option in "/etc/audisp/audisp-remote.conf" and set it to "syslog", "single", or "halt", such as the following line:

disk_full_action = single