SV-234902r1009637: The SUSE operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/security/opasswd. | 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 all account creations, modifications, disabling, and termination events that affect /etc/security/opasswd.

Description

Discussion Text

Once an attacker establishes initial access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to simply create a new account. Auditing of account creation mitigates this risk. To address access requirements, many SUSE operating systems may be integrated with enterprise-level authentication/access/auditing mechanisms that meet or exceed access control policy requirements. Satisfies: SRG-OS-000004-GPOS-00004, SRG-OS-000239-GPOS-00089, SRG-OS-000240-GPOS-00090, SRG-OS-000241-GPOS-00091, SRG-OS-000303-GPOS-00120, SRG-OS-000463-GPOS-00207, SRG-OS-000476-GPOS-00221

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

IA Controls

NIST SP 800-53

Not mappedCCI-000018Not mappedCCI-000172Not mappedCCI-001403Not mappedCCI-002130Not mappedCCI-000015Not mappedCCI-002132

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:147
# The SUSE operating system must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/security/opasswd.
# 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+/etc/security/opasswd(\s+-p\s*([rx]*w[rx]*a[rx]*|[rx]*a[rx]*w[rx]*))?(\s+(-k\s+|-F\s+key=)\S+)*\s*$' '/etc/audit/audit.rules' &>/dev/null
}
# textfilecontent54_object (textfilecontent54_test)
test_2() {
  grep -Pq '^\s*-a\s+(always,exit|exit,always)(\s+-S\s+all)?\s+-F\s+path=/etc/security/opasswd(\s+(-p\s+|-F\s+perm=)([rx]*w[rx]*a[rx]*|[rx]*a[rx]*w[rx]*))?(\s+(-k\s+|-F\s+key=)\S+)*\s*$' '/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:mil.disa.stig.sles15:def:147

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

Remediation

Configure the SUSE operating system to generate an audit record when all modifications to the "/etc/security/opasswd" file occur.

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

-w /etc/security/opasswd -p wa -k account_mod

To reload the rules file, restart the audit daemon:

> sudo systemctl restart auditd.service

or issue the following command:

> sudo augenrules --load