SV-238299r1069095: The Ubuntu operating system must initiate session audits at system start-up. | Canonical Ubuntu 20.04 LTS STIG SCAP Benchmark

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Assessment Title

Rule Text

The Ubuntu operating system must initiate session audits at system start-up.

Description

Discussion Text

If auditing is enabled late in the start-up process, the actions of some start-up 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 20.04 LTS DISA DPMS Target Canonical Ubuntu 20.04 LTS 5318

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.ubuntu2004os:def:238299
# The Ubuntu operating system must initiate session audits at system start-up.
# 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.ubuntu2004os:def:238299

if grep -q "^GRUB_CMDLINE_LINUX_DEFAULT=.*audit=1" /etc/default/grub && grep -q "^GRUB_CMDLINE_LINUX=.*audit=1" /etc/default/grub && grep -q "linux.*audit=1" /boot/grub/grub.cfg; then
    echo "PASS"
    exit 0
else
    echo "FAIL"
    exit 1
fi

Remediation

Configure the Ubuntu operating system 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