SV-258162r1184331: RHEL 9 must take appropriate action when the internal event queue is full. | Red Hat Enterprise Linux 9 STIG SCAP Benchmark

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Assessment Title

Rule Text

RHEL 9 must take appropriate action when the internal event queue is full.

Description

Discussion Text

The audit system should have an action setup in the event the internal event queue becomes full so that no data is lost. Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Offloading is a common process in information systems with limited audit storage capacity. Satisfies: SRG-OS-000342-GPOS-00133, SRG-OS-000479-GPOS-00224

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

IA Controls

NIST SP 800-53

Not mappedCCI-001851

References

DPMS Target Red Hat Enterprise Linux 9 DISA DPMS Target Red Hat Enterprise Linux 9 5551

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.rhel9os:def:258162
# RHEL 9 must take appropriate action when the internal event queue is full.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# textfilecontent54_object (textfilecontent54_test)
test_1() {
  ( (sed -En 's/(?i)^\s*overflow_action\s*=\s*(\w+)\s*(?:#.*)?$/\1/p' '/etc/audit/auditd.conf') | grep -Pq '(?i)^syslog$' ) || ( (sed -En 's/(?i)^\s*overflow_action\s*=\s*(\w+)\s*(?:#.*)?$/\1/p' '/etc/audit/auditd.conf') | grep -Pq '(?i)^single$' ) || ( (sed -En 's/(?i)^\s*overflow_action\s*=\s*(\w+)\s*(?:#.*)?$/\1/p' '/etc/audit/auditd.conf') | grep -Pq '(?i)^halt$' )
}

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.rhel9os:def:258162
if [ ! -f "/etc/audit/auditd.conf" ]; then echo "PASS"; exit 0; fi
grep -qE "^\\s*overflow_action\\s*=\\s*(syslog|single|halt)\\s*$" /etc/audit/auditd.conf
if [ $? -eq 0 ]; then echo "PASS"; exit 0; fi
echo "FAIL"; exit 1

Remediation

Edit the /etc/audit/auditd.conf file and add or update the "overflow_action" option:

overflow_action = syslog

The audit daemon must be restarted for changes to take effect.