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 must be configured so that the file integrity tool verifies Access Control Lists (ACLs).

Cloud Linux AlmaLinux OS 9 Security Technical Implementation Guide

Assessment Title

Rule Text

AlmaLinux OS 9 must be configured so that the file integrity tool verifies Access Control Lists (ACLs).

Description

Discussion Text

ACLs can provide permissions beyond those permitted through the file mode and must be verified by the file integrity tools.

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

Objective

V-269239

Rule

SV-269239r1050121_rule

Severity

medium

Rule Version

ALMA-09-018060

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

Verify that that AIDE is verifying ACLs with the following command:

$ grep acl /etc/aide.conf 

All= p+i+n+u+g+s+m+S+sha512+acl+xattrs+selinux

If the "acl" rule is not being used on all uncommented selection lines in the "/etc/aide.conf" file, or ACLs are not being checked by another file integrity tool, this is a finding.

Implementation Procedure

Fix Text

Configure the file integrity tool to check file and directory ACLs. 

If AIDE is installed, ensure the "acl" rule is present on all uncommented file and directory selection lists.

STIG check 133 of 439 in the Cloud Linux AlmaLinux OS 9 STIG checklist

← Previous · V-269238AlmaLinux OS 9 must not have unauthorized accounts.Next · V-269240 →AlmaLinux OS 9 must use a file integrity tool that is configured to use FIPS 140-3-approved cryptographic hashes for validating file contents and directories.