The operating system must detect unauthorized changes to software and information.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-38670	RHEL-06-000306	SV-50471r2_rule		Medium

Description
By default, AIDE does not install itself for periodic execution. Periodically running AIDE may reveal unexpected changes in installed files.

STIG	Date
Red Hat Enterprise Linux 6 Security Technical Implementation Guide	2015-05-26

Details

Check Text ( C-46229r2_chk )
To determine that periodic AIDE execution has been scheduled, run the following command: # grep aide /etc/crontab /etc/cron.*/* If there is no output, this is a finding.

Fix Text (F-43619r1_fix)
AIDE should be executed on a periodic basis to check for changes. To implement a daily execution of AIDE at 4:05am using cron, add the following line to /etc/crontab: 05 4 * * * root /usr/sbin/aide --check AIDE can be executed periodically through other means; this is merely one example.