The cron.deny file must be group-owned by wheel.

From MAC OSX 10.6 Workstation Security Technical Implementation Guide

Associated with IA controls: ECLP-1

Associated with: CCI-000225

SV-38119r1_rule The cron.deny file must be group-owned by wheel.

Vulnerability discussion

The cron daemon control files and restricts the scheduling of automated tasks and must be protected. Unauthorized modification of the cron.deny file could result in Denial of Service to authorized cron users or could provide unauthorized users with the ability to run cron jobs.

Check content

Open a terminal session and enter the following command to verify the group ownership of the "/private/var/at/cron.deny" file. ls -lL /private/var/at/cron.deny If the "/private/var/at/cron.deny" file is not group owned by wheel, this is a finding.

Fix text

Open a terminal session and enter the following command to set the group. chgrp wheel /private/var/at/cron.deny

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