Cloud Linux AlmaLinux OS 9 Security Technical Implementation Guide

The Cloud Linux AlmaLinux OS 9 Security Technical Implementation Guide (V1 R8) has 439 STIG checks. New to STIG checklists? Read What is a STIG checklist?, CKL vs CKLB, and STIG vs SCAP benchmark.

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Severity

Version

V1 · R8

CurrentPublished Wed Sep 30 2026

AlmaLinux OS 9 audit system must protect logon UIDs from unauthorized change.

Cloud Linux AlmaLinux OS 9 Security Technical Implementation Guide

Assessment Title

Rule Text

AlmaLinux OS 9 audit system must protect logon UIDs from unauthorized change.

Description

Discussion Text

If modification of login user identifiers (UIDs) is not prevented, they can be changed by nonprivileged users and make auditing complicated or impossible.

New to STIG checklists? Read What is a STIG checklist? and CKL vs CKLB.

Objective

V-269544

Rule

SV-269544r1050427_rule

Severity

medium

Rule Version

ALMA-09-056780

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

Verify the audit system prevents unauthorized changes to logon UIDs with the following command:

$ grep immutable /etc/audit/audit.rules

--loginuid-immutable

If the "--loginuid-immutable" option is not returned in the "/etc/audit/audit.rules", or the line is commented out, this is a finding.

Implementation Procedure

Fix Text

Configure AlmaLinux OS 9 auditing to prevent modification of login UIDs once they are set by adding the following line to /etc/audit/rules.d/audit.rules:

--loginuid-immutable

STIG check 428 of 439 in the Cloud Linux AlmaLinux OS 9 STIG checklist

← Previous · V-269543AlmaLinux OS 9 audit tools must have a mode of 0755 or less permissive.Next · V-269545 →AlmaLinux OS 9 must use cryptographic mechanisms to protect the integrity of audit tools.