SV-270676r1155245: Ubuntu 24.04 LTS must initiate session audits at system startup. | Canonical Ubuntu 24.04 LTS STIG SCAP Benchmark

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Assessment Title

Rule Text

Ubuntu 24.04 LTS must initiate session audits at system startup.

Description

Discussion Text

If auditing is enabled late in the startup process, the actions of some startup processes may not be audited. Some audit systems also maintain state information only available if auditing is enabled before a given process is created.

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

IA Controls

NIST SP 800-53

Not mappedCCI-001464

References

DPMS Target Canonical Ubuntu 24.04 LTS DISA DPMS Target Canonical Ubuntu 24.04 LTS 5673

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.ubuntu2404os:def:270676
# Ubuntu 24.04 LTS must initiate session audits at system startup.
# 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/^\s*linux\s+(.+)$/\1/p' '/boot/grub/grub.cfg') | grep -Pq '\baudit=1\b'
}
# textfilecontent54_object (textfilecontent54_test)
test_2() {
  (sed -En 's/(?i)^\s*GRUB_CMDLINE_LINUX\w*\s*=\s*(.+)$/\1/p' '/etc/default/grub') | grep -Pq '\baudit=1\b'
}

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.ubuntu2404os:def:270676
if grep -qE "\\baudit=1\\b" /boot/grub/grub.cfg && grep -qE "\\baudit=1\\b" /etc/default/grub; then echo "PASS"; exit 0; else echo "FAIL"; exit 1; fi

Remediation

Configure Ubuntu 24.04 LTS to produce audit records at system startup.  
 
Edit the "/etc/default/grub" file and add "audit=1" to the "GRUB_CMDLINE_LINUX" option and to the "GRUB_CMDLINE_LINUX_DEFAULT" option. 

GRUB_CMDLINE_LINUX_DEFAULT="audit=1"
GRUB_CMDLINE_LINUX="audit=1"
 
To update the grub config file, run: 
 
$ sudo update-grub