SV-230483r971542: RHEL 8 must take action when allocated audit record storage volume reaches 75 percent of the repository maximum audit record storage capacity. | Red Hat Enterprise Linux 8 STIG SCAP Benchmark

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Assessment Title

Rule Text

RHEL 8 must take action when allocated audit record storage volume reaches 75 percent of the repository maximum audit record storage capacity.

Description

Discussion Text

If security personnel are not notified immediately when storage volume reaches 75 percent utilization, they are unable to plan for audit record storage capacity expansion.

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

IA Controls

NIST SP 800-53

Not mappedCCI-001855

References

DPMS Target Red Hat Enterprise Linux 8 DISA DPMS Target Red Hat Enterprise Linux 8 2921

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.rhel8os:def:230483
# RHEL 8 must take action when allocated audit record storage volume reaches 75 percent of the repository maximum audit record storage capacity.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# /etc/audit/auditd.conf: space_left greater than or equal to 25%
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  [ "$(sed -En 's/(?i)^\s*space_left\s*=\s*([\d]+)%\s*(?:#.*)?$/\1/p' '/etc/audit/auditd.conf')" -ge 25 ]
}
# /etc/audit/auditd.conf: space_left less than 100%
# textfilecontent54_object (textfilecontent54_test)
test_2() {
  [ "$(sed -En 's/(?i)^\s*space_left\s*=\s*([\d]+)%\s*(?:#.*)?$/\1/p' '/etc/audit/auditd.conf')" -lt 100 ]
}

if ( test_1 && test_2 ); 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:mil.disa.stig.rhel8os:def:230483
if [ ! -f "/etc/audit/auditd.conf" ]; then echo "PASS"; exit 0; fi; \
grep -qE "(?i)^\\s*space_left\\s*=\\s*([0-9]+)%" /etc/audit/auditd.conf || echo "PASS"; exit 0; \
space_left=$(grep -E "(?i)^\\s*space_left\\s*=\\s*([0-9]+)%" /etc/audit/auditd.conf | sed's/%//g' | head -n 1); \
if [ "$space_left" -ge "25" ] && [ "$space_left" -lt "100" ]; then echo "PASS"; exit 0; fi; echo "FAIL"; exit 1;

Remediation

Configure the operating system to initiate an action to notify the SA and ISSO (at a minimum) when allocated audit record storage volume reaches 75 percent of the repository maximum audit record storage capacity by adding/modifying the following line in the /etc/audit/auditd.conf file.

space_left = 25%

Note: Option names and values in the auditd.conf file are case insensitive.