Title

The at.deny file must have mode 0600 or less permissive. (Cat II impact)

Discussion

The at daemon control files restrict access to scheduled job manipulation and must be protected. Unauthorized modification of the at.deny file could result in Denial of Service to authorized at users or provide unauthorized users with the ability to run at jobs.

Check Content

Check the permissions of the file. # ls -lL /etc/cron.d/at.deny If the file has a mode more permissive than 0600, this is a finding.

Fix Text

Change the mode of the file. # chmod 0600 /etc/cron.d/at.deny

Additional Identifiers

Rule ID: SV-227761r603266_rule

Vulnerability ID: V-227761

Group Title: SRG-OS-000480

Expert Comments

CCIs tied to check.

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