Determine if there is an automated job, scheduled to run weekly or more frequently, to run the file integrity tool to check for unauthorized additions to system libraries. The check can be done using Advanced Intrusion Detection Environment (AIDE) which is part of the SUSE Linux Enterprise Server (SLES) distribution. Other file integrity software may be used but must be checked manually.
Procedure: Check the root crontab (crontab -l) and the global crontabs in /etc/crontab, /etc/cron.d/* for the presence of an "aide" job to run at least weekly, which should have asterisks (*) in columns 3, 4, and 5.
Check the weekly cron directory (/etc/cron.weekly) for any script running "aide --check" or "aide -C" or simply "aide". If one does not exist, this is a finding. |