SV-274108r1120312: Amazon Linux 2023 audit logs must be group-owned by root or by a restricted logging group to prevent unauthorized read access. | Amazon Linux 2023 STIG SCAP Benchmark

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Assessment Title

Rule Text

Amazon Linux 2023 audit logs must be group-owned by root or by a restricted logging group to prevent unauthorized read access.

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, SRG-OS-000059-GPOS-00029, SRG-OS-000206-GPOS-00084

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

IA Controls

NIST SP 800-53

Not mappedCCI-000162Not mappedCCI-000163Not mappedCCI-000164Not mappedCCI-001314

References

DPMS Target Amazon Linux 2023 DISA DPMS Target Amazon Linux 2023 5700

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.amzlx23os:def:274108
if [ ! -f "/etc/audit/auditd.conf" ]; then echo "PASS"; exit 0; fi
grep -q '^\\s*log_file\\s*=\\s*(\\S+)\\s*' /etc/audit/auditd.conf || { echo "PASS"; exit 0; }
LOG_GROUP=$(grep -oP '^\\s*log_group\\s*=\\s*(\\S+)\\s*$' /etc/audit/auditd.conf)
if [ -z "$LOG_GROUP" ]; then echo "PASS"; exit 0; fi
if [ ! -d "/var/log/audit" ]; then echo "PASS"; exit 0; fi
if [ ! -f "/var/log/audit/audit.log" ]; then echo "PASS"; exit 0; fi
if [ ! -g "/var/log/audit" ]; then echo "FAIL"; exit 1; fi
if [ $(stat -c "%G" /var/log/audit) = "$LOG_GROUP" ] || [ $(stat -c "%G" /var/log/audit) = "root" ]; then echo "PASS"; exit 0; else echo "FAIL"; exit 1; fi

Remediation

Configure Amazon Linux 2023 so that audit logs are group-owned by "root" or a restricted logging group.

Change the group of the directory of "/var/log/audit" to be owned by a correct group.

Identify the group that is configured to own audit log:

$ sudo grep -P '^[ ]*log_group[ ]+=.*$' /etc/audit/auditd.conf

Change the ownership to that group:

$ sudo chgrp ${GROUP} /var/log/audit