SV-253039r991578: Successful/unsuccessful modifications to the "lastlog" file in TOSS must generate an audit record. | Tri-Lab Operating System Stack (TOSS) 4 STIG SCAP Benchmark

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Assessment Title

Rule Text

Successful/unsuccessful modifications to the "lastlog" file in TOSS must generate an audit record.

Description

Discussion Text

Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). Satisfies: SRG-OS-000470-GPOS-00214, SRG-OS-000473-GPOS-00218

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

IA Controls

NIST SP 800-53

Not mappedCCI-000172

References

DPMS Target TOSS 4 DISA DPMS Target TOSS 4 5469

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.toss4os:def:253039
# Successful/unsuccessful modifications to the "lastlog" file in TOSS must generate an audit record.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Audit modifications to /var/log/lastlog
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  grep -Pq '^\s*-w\s+/var/log/lastlog(\s+-p\s*([rx]*w[rx]*a[rx]*|[rx]*a[rx]*w[rx]*))?(\s+(-k\s+|-F\s+key=)\w+)?\s*$' '/etc/audit/audit.rules' &>/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.toss4os:def:253039
if [ ! -f "/etc/audit/rules.d/audit.rules" ]; then echo "PASS"; exit 0; fi
grep "^\\s*-w\\s+/var/log/lastlog(\\s+-p\\s*([rx]*w[rx]*a[rx]*|[rx]*a[rx]*w[rx]*))?(\\s+(-k\\s+|-F\\s+key=)\\w+)?\\s*$" /etc/audit/rules.d/audit.rules | grep -q "^\\s*-w\\s+/var/log/lastlog\\s*-p\\s*wa\\s*$" || { echo "FAIL"; exit 1; }
echo "PASS"; exit 0

Remediation

Configure the audit system to generate an audit event for any successful/unsuccessful modifications to the "lastlog" file by adding or updating the following rules in the "/etc/audit/rules.d/audit.rules" file:

-w /var/log/lastlog -p wa -k logins

The audit daemon must be restarted for the changes to take effect.