SV-260596r971542: Ubuntu 22.04 LTS must immediately notify the system administrator (SA) and information system security officer (ISSO) when the audit record storage volume reaches 25 percent remaining of the allocated capacity. | Canonical Ubuntu 22.04 LTS STIG SCAP Benchmark

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Assessment Title

Rule Text

Ubuntu 22.04 LTS must immediately notify the system administrator (SA) and information system security officer (ISSO) when the audit record storage volume reaches 25 percent remaining of the allocated capacity.

Description

Discussion Text

If security personnel are not notified immediately when storage volume reaches 25 percent remaining of the allocated capacity, 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 Canonical Ubuntu 22.04 LTS DISA DPMS Target Canonical Ubuntu 22.04 LTS 5594

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.ubuntu2204os:def:260596
# Ubuntu 22.04 LTS must immediately notify the system administrator (SA) and information system security officer (ISSO) when the audit record storage volume reaches 25 percent remaining of the allocated capacity.
# 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() {
  [ "$(sed -En 's/(?i)^\s*space_left\s*=\s*([\d]+)%\s*(?:#.*)?$/\1/p' '/etc/audit/auditd.conf')" -ge 25 ]
}
# textfilecontent54_object (textfilecontent54_test)
test_2() {
  (sed -En 's/(?i)^\s*space_left_action\s*=\s*(\w+)\s*(?:#.*)?$/\1/p' '/etc/audit/auditd.conf') | grep -Pq '(?i)^email$'
}

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 Definition: oval:mil.disa.stig.ubuntu2204os:def:260596
if [ ! -f "/etc/audit/auditd.conf" ]; then echo "PASS"; exit 0; fi
if grep -qE "(?i)^\\s*space_left\\s*=\\s*25%" "/etc/audit/auditd.conf"; then :; else echo "FAIL"; exit 1; fi
if grep -qE "(?i)^\\s*space_left_action\\s*=\\s*email\\s*$" "/etc/audit/auditd.conf"; then :; else echo "FAIL"; exit 1; fi
echo "PASS"; exit 0

Remediation

Configure Ubuntu 22.04 LTS to notify the SA and ISSO when the audit record storage volume reaches 25 percent remaining of the allocated capacity. 
 
Add or modify the following lines in the "/etc/audit/auditd.conf " file: 
 
space_left = 25% 
space_left_action = email 
 
Restart the "auditd" service for the changes to take effect:  
  
     $ sudo systemctl restart auditd.service 
  
Note: If the "space_left_action" parameter is set to "exec", ensure the command being executed notifies the SA and ISSO.