SV-258070r1045153: RHEL 9 must log username information when unsuccessful logon attempts occur. | Red Hat Enterprise Linux 9 STIG SCAP Benchmark

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Assessment Title

Rule Text

RHEL 9 must log username information when unsuccessful logon attempts occur.

Description

Discussion Text

Without auditing of these events, it may be harder or impossible to identify what an attacker did after an attack.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000044

References

DPMS Target Red Hat Enterprise Linux 9 DISA DPMS Target Red Hat Enterprise Linux 9 5551

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.rhel9os:def:258070
# RHEL 9 must log username information when unsuccessful logon attempts occur.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# audit is set in /etc/security/faillock.conf
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  grep -Pq '^\s*audit\s*$' '/etc/security/faillock.conf' &>/dev/null
}

if test_1; 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 Definition: oval:mil.disa.stig.rhel9os:def:258070

if [ ! -f "/etc/security/faillock.conf" ]; then
  echo "PASS"
  exit 0
fi

if grep -q '^\\s*audit\\s*$' /etc/security/faillock.conf && grep -c '^\\s*audit\\s*$' /etc/security/faillock.conf -ge 1; then
  echo "PASS"
  exit 0
fi

echo "FAIL"
exit 1

Remediation

Configure RHEL 9 to log username information when unsuccessful logon attempts occur.

Enable the feature using the following command:
 
$ sudo authselect enable-feature with-faillock 
 
Add/modify the "/etc/security/faillock.conf" file to match the following line:

audit