Title

Crontab files must be group-owned by root, sys, or the crontab creator's primary group. (Cat II impact)

Discussion

To protect the integrity of scheduled system jobs and prevent malicious modification to these jobs, crontab files must be secured.

Check Content

Check the group ownership of the crontab files. # ls -lL /var/spool/cron/crontabs/ If the group owner is not root, sys, or the crontab owner's primary group, this is a finding.

Fix Text

Change the group owner of the crontab file to root, sys, or the crontab's primary group. Procedure: # chgrp root [crontab file]

Additional Identifiers

Rule ID: SV-227744r603266_rule

Vulnerability ID: V-227744

Group Title: SRG-OS-000480

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.