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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-271499	OL09-00-000303	SV-271499r1091209_rule		Low

Description

OL 9 installation media ships with an optional file integrity tool called Advanced Intrusion Detection Environment (AIDE). AIDE is highly configurable at install time. This requirement assumes the "aide.conf" file is under the "/etc" directory. ACLs can provide permissions beyond those permitted through the file mode and must be verified by the file integrity tools.

STIG	Date
Oracle Linux 9 Security Technical Implementation Guide	2025-05-08

Details

Check Text (C-75549r1091207_chk)

Verify that OL 9 is configured so that AIDE is verifying ACLs with the following command:

$ sudo 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.

Fix Text (F-75456r1091208_fix)

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.