Common Controls Hub
The operating system must employ automated mechanisms, per organization defined frequency, to detect the addition of unauthorized components/devices into the operating system.
By default, AIDE does not install itself for periodic execution. Periodically running AIDE may reveal unexpected changes in installed files.
Red Hat Enterprise Linux 6 Security Technical Implementation Guide
Check Text ( C-19530r377162_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-19528r377163_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.