SV-234913r958412: The SUSE operating system must audit all uses of the sudoers file and all files in the /etc/sudoers.d/ directory. | SUSE Linux Enterprise Server 15 STIG SCAP Benchmark

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Assessment Title

Rule Text

The SUSE operating system must audit all uses of the sudoers file and all files in the /etc/sudoers.d/ directory.

Description

Discussion Text

Reconstruction of harmful events or forensic analysis is not possible if audit records do not contain enough information. At a minimum, the organization must audit the full-text recording of privileged access commands. The organization must maintain audit trails in sufficient detail to reconstruct events to determine the cause and impact of compromise. Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215

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

IA Controls

NIST SP 800-53

Not mappedCCI-000130Not mappedCCI-000169Not mappedCCI-000172Not mappedCCI-002884

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:158
# The SUSE operating system must audit all uses of the sudoers file and all files in the /etc/sudoers.d/ directory.
# 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/sudoers(\s+-p\s*([rx]*w[rx]*a[rx]*|[rx]*a[rx]*w[rx]*))?(\s+(-k\s+|-F\s+key=)\S+)*\s*$' '/etc/audit/audit.rules' &>/dev/null
}
# textfilecontent54_object (textfilecontent54_test)
test_2() {
  grep -Pq '^\s*-a\s+(always,exit|exit,always)(\s+-S\s+all)?\s+-F\s+path=/etc/sudoers(\s+(-p\s+|-F\s+perm=)([rx]*w[rx]*a[rx]*|[rx]*a[rx]*w[rx]*))?(\s+(-k\s+|-F\s+key=)\S+)*\s*$' '/etc/audit/audit.rules' &>/dev/null
}
# textfilecontent54_object (textfilecontent54_test)
test_3() {
  grep -Pq '^\s*-w\s+/etc/sudoers.d/?(\s+-p\s*([rx]*w[rx]*a[rx]*|[rx]*a[rx]*w[rx]*))?(\s+(-k\s+|-F\s+key=)\S+)*\s*$' '/etc/audit/audit.rules' &>/dev/null
}
# textfilecontent54_object (textfilecontent54_test)
test_4() {
  grep -Pq '^\s*-a\s+(always,exit|exit,always)(\s+-S\s+all)?\s+-F\s+path=/etc/sudoers.d/?(\s+(-p\s+|-F\s+perm=)([rx]*w[rx]*a[rx]*|[rx]*a[rx]*w[rx]*))?(\s+(-k\s+|-F\s+key=)\S+)*\s*$' '/etc/audit/audit.rules' &>/dev/null
}

if ( ( test_1 || test_2 ) && ( test_3 || test_4 ) ); 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:158
if [ ! -f "/etc/audit/rules.d/audit.rules" ]; then echo "FAIL"; exit 1; fi
grep -q "^\\s*-w\\s+/etc/sudoers\\s+-p\\s*([rx]*w[rx]*a[rx]*|[rx]*a[rx]*w[rx]*)?\\s*(-k\\s+|-F\\s+key=)\\S+\\s*$" /etc/audit/rules.d/audit.rules || true
grep -q "^\\s*-w\\s+/etc/sudoers.d/\\s+-p\\s*([rx]*w[rx]*a[rx]*|[rx]*a[rx]*w[rx]*)?\\s*(-k\\s+|-F\\s+key=)\\S+\\s*$" /etc/audit/rules.d/audit.rules || true
if [ $? -eq 0 ]; then echo "PASS"; exit 0; fi
echo "FAIL"; exit 1

Remediation

Configure the SUSE operating system to generate audit records when successful/unsuccessful attempts to access the "/etc/sudoers" file and files in the "/etc/sudoers.d/" directory.

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

-w /etc/sudoers -p wa -k privileged-actions

-w /etc/sudoers.d -p wa -k privileged-actions

To reload the rules file, restart the audit daemon

> sudo systemctl restart auditd.service

or issue the following command:

> sudo augenrules --load