SV-260597r958434: Ubuntu 22.04 LTS must be configured so that audit log files are not read- or write-accessible by unauthorized users. | Canonical Ubuntu 22.04 LTS STIG SCAP Benchmark

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Assessment Title

Rule Text

Ubuntu 22.04 LTS must be configured so that audit log files are not read- or write-accessible by unauthorized users.

Description

Discussion Text

Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confidentiality. Audit information includes all information (e.g., audit records, audit settings, audit reports) needed to successfully audit operating system activity. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028

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

IA Controls

NIST SP 800-53

Not mappedCCI-000162Not mappedCCI-000163

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.

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:260597

log_file=$(grep -E '^\s*log_file\s*=\s*(\\S+)' /etc/audit/auditd.conf | cut -d= -f2)
if [ -z "$log_file" ]; then echo "PASS"; exit 0; fi
for file in /var/log/audit/*; do
    if [ ! -f "$file" ]; then continue; fi
    perm=$(stat -c "%a" "$file")
    if [ $perm -ge 600 ]; then continue; else echo "FAIL"; exit 1; fi
done
echo "PASS"
exit 0

Remediation

Configure the audit log files to have a mode of "600" or less permissive.  
  
Using the path of the directory containing the audit logs, configure the audit log files to have a mode of "600" or less permissive by using the following command:  
  
     $ sudo chmod 600 /var/log/audit/*