SV-234977r991581: The SUSE operating system must generate audit records for the /var/log/btmp file. | SUSE Linux Enterprise Server 15 STIG SCAP Benchmark

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Assessment Title

Rule Text

The SUSE operating system must generate audit records for the /var/log/btmp file.

Description

Discussion Text

Without generating audit records 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).

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

IA Controls

NIST SP 800-53

Not mappedCCI-000172

References

DPMS Target SUSE Linux Enterprise Server 15 DISA DPMS Target SUSE Linux Enterprise Server 15 5274

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.sles15:def:212
# The SUSE operating system must generate audit records for the /var/log/btmp file.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# textfilecontent54_object (textfilecontent54_test)
test_1() {
  grep -Pq '^\s*-w\s+/var/log/btmp(\s+-p\s*([rx]*w[rx]*a[rx]*|[rx]*a[rx]*w[rx]*))?(\s+(-k\s+|-F\s+key=)\S+)*\s*$' '/etc/audit/audit.rules' &>/dev/null
}
# textfilecontent54_object (textfilecontent54_test)
test_2() {
  grep -Pq '^\s*-a\s+(always,exit|exit,always)(\s+-S\s+all)?\s+-F\s+path=/var/log/btmp(\s+(-p\s+|-F\s+perm=)([rx]*w[rx]*a[rx]*|[rx]*a[rx]*w[rx]*))?(\s+(-k\s+|-F\s+key=)\S+)*\s*$' '/etc/audit/audit.rules' &>/dev/null
}

if ( test_1 || test_2 ); 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.sles15:def:212

if grep -q "^\\s*-w\\s+/var/log/btmp(\\s+-p\\s*([rx]*w[rx]*a[rx]*|[rx]*a[rx]*w[rx]*))?(\\s+(-k\\s+|-F\\s+key=)\\S+)*\\s*$" /etc/audit/audit.rules || \
   grep -q "^\\s*-a\\s+(always,exit|exit,always)(\\s+-S\\s+all)?\\s+-F\\s+path=/var/log/btmp(\\s+(-p\\s+|-F\\s+perm=)([rx]*w[rx]*a[rx]*|[rx]*a[rx]*w[rx]*))?(\\s+(-k\\s+|-F\\s+key=)\\S+)*\\s*$" /etc/audit/audit.rules; then
    echo "PASS"
    exit 0
else
    echo "FAIL"
    exit 1
fi

Remediation

Configure the SUSE operating system to generate an audit record for the "/var/log/btmp" file. 

Add or update the following rules to "/etc/audit/rules.d/audit.rules":

-w /var/log/btmp -p wa -k login_mod

To reload the rules file, restart the audit daemon

> sudo systemctl restart auditd.service

or issue the following command:

> sudo augenrules --load