The audit system must be configured to audit modifications to the systems Mandatory Access Control (MAC) configuration (SELinux).

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-51171	OL6-00-000183	SV-65381r2_rule		Low

Description
The system's mandatory access policy (SELinux) should not be arbitrarily changed by anything other than administrator action. All changes to MAC policy should be audited.

STIG	Date
Oracle Linux 6 Security Technical Implementation Guide	2018-03-01

Details

Check Text ( C-53575r2_chk )
To determine if the system is configured to audit changes to its SELinux configuration files, run the following command: $ sudo grep -w "/etc/selinux" /etc/audit/audit.rules If the system is configured to watch for changes to its SELinux configuration, a line should be returned (including "-p wa" indicating permissions that are watched). If the system is not configured to audit attempts to change the MAC policy, this is a finding.

Check Text ( C-53575r2_chk )

To determine if the system is configured to audit changes to its SELinux configuration files, run the following command:

$ sudo grep -w "/etc/selinux" /etc/audit/audit.rules

If the system is configured to watch for changes to its SELinux configuration, a line should be returned (including "-p wa" indicating permissions that are watched).

If the system is not configured to audit attempts to change the MAC policy, this is a finding.

Fix Text (F-55979r1_fix)
Add the following to "/etc/audit/audit.rules": -w /etc/selinux/ -p wa -k MAC-policy