SV-274111r1261386: Amazon Linux 2023 must allow only the information system security manager (ISSM) (or individuals or roles appointed by the ISSM) to select which auditable events are to be audited. | Amazon Linux 2023 STIG SCAP Benchmark

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Assessment Title

Rule Text

Amazon Linux 2023 must allow only the information system security manager (ISSM) (or individuals or roles appointed by the ISSM) to select which auditable events are to be audited.

Description

Discussion Text

Without the capability to restrict which roles and individuals can select which events are audited, unauthorized personnel may be able to prevent the auditing of critical events. Misconfigured audits may degrade the system's performance by overwhelming the audit log. Misconfigured audits may also make it more difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000171

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.

#!/bin/bash
# Reconstructed from oval:mil.disa.stig.amzlx23os:def:274111
# Amazon Linux 2023 must allow only the information system security manager (ISSM) (or individuals or roles appointed by the ISSM) to select which auditable events are to be audited.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.
#
# MANUAL REVIEW REQUIRED -- the module(s) below could not be reconstructed
# into working code from curated SCC reference data, and are excluded from
# the automated result:
#   - file_object (file_test) -- .rules files in /etc/audit/rules.d have mode 0600 or less permissive: no extractor for field "gexec"

# /etc/audit/auditd.conf has mode 0600 or less permissive
# file_object (file_test)
test_1() {
  ( (stat -c '%A' '/etc/audit/auditd.conf' | awk '{print (substr($0,7,1)=="x" || substr($0,7,1)=="s")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/etc/audit/auditd.conf' | awk '{print (substr($0,8,1)=="r")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/etc/audit/auditd.conf' | awk '{print (substr($0,4,1)=="x" || substr($0,4,1)=="s")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/etc/audit/auditd.conf' | awk '{print (substr($0,10,1)=="t" || substr($0,10,1)=="T")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/etc/audit/auditd.conf' | awk '{print (substr($0,7,1)=="s" || substr($0,7,1)=="S")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/etc/audit/auditd.conf' | awk '{print (substr($0,4,1)=="s" || substr($0,4,1)=="S")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/etc/audit/auditd.conf' | awk '{print (substr($0,10,1)=="x" || substr($0,10,1)=="t")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/etc/audit/auditd.conf' | awk '{print (substr($0,9,1)=="w")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/etc/audit/auditd.conf' | awk '{print (substr($0,5,1)=="r")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/etc/audit/auditd.conf' | awk '{print (substr($0,6,1)=="w")?"true":"false"}') | grep -qxF 'false' )
}
# /etc/audit/audit.rules has mode 0600 or less permissive
# file_object (file_test)
test_3() {
  ( (stat -c '%A' '/etc/audit/audit.rules' | awk '{print (substr($0,7,1)=="x" || substr($0,7,1)=="s")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/etc/audit/audit.rules' | awk '{print (substr($0,8,1)=="r")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/etc/audit/audit.rules' | awk '{print (substr($0,4,1)=="x" || substr($0,4,1)=="s")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/etc/audit/audit.rules' | awk '{print (substr($0,10,1)=="t" || substr($0,10,1)=="T")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/etc/audit/audit.rules' | awk '{print (substr($0,7,1)=="s" || substr($0,7,1)=="S")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/etc/audit/audit.rules' | awk '{print (substr($0,4,1)=="s" || substr($0,4,1)=="S")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/etc/audit/audit.rules' | awk '{print (substr($0,10,1)=="x" || substr($0,10,1)=="t")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/etc/audit/audit.rules' | awk '{print (substr($0,9,1)=="w")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/etc/audit/audit.rules' | awk '{print (substr($0,5,1)=="r")?"true":"false"}') | grep -qxF 'false' ) && ( (stat -c '%A' '/etc/audit/audit.rules' | awk '{print (substr($0,6,1)=="w")?"true":"false"}') | grep -qxF 'false' )
}

if ( test_1 && test_3 ); then
  echo "PASS (automated portion only -- MANUAL REVIEW still required, see notes above)"
else
  echo "FAIL (or see MANUAL REVIEW note above)"
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.amzlx23os:def:274111
if [ ! -f "/etc/audit/auditd.conf" ]; then echo "PASS"; exit 0; fi; stat -c "%a" "/etc/audit/auditd.conf" | grep -q "^0600$" || { echo "FAIL"; exit 1; }
if [ ! -d "/etc/audit/rules.d" ]; then echo "PASS"; exit 0; fi; find "/etc/audit/rules.d" -type f -name "*.rules" -exec stat -c "%a" {} \; | grep -q "^0600$" || { echo "FAIL"; exit 1; }
if [ ! -f "/etc/audit/audit.rules" ]; then echo "PASS"; exit 0; fi; stat -c "%a" "/etc/audit/audit.rules" | grep -q "^0600$" || { echo "FAIL"; exit 1; }
echo "PASS"; exit 0

Remediation

Configure Amazon Linux 2023 so that the rules files in the directory /etc/audit/rules.d/, the /etc/audit/audit.rules file, and the /etc/audit/auditd.conf file to have a mode of 0600 with the following commands:

$ sudo find /etc/audit/rules.d/ -type f -name "*.rules" -exec chmod 0600 {} +

$ sudo chmod 0600 /etc/audit/audit.rules

$ sudo chmod 0600 /etc/audit/auditd.conf