The cron.allow 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-38117r1_rule The cron.allow file must be group-owned by wheel.

Vulnerability discussion

If the group of the cron.allow is not set to wheel, the possibility exists for an unauthorized user to view or edit the list of users permitted to use cron. Unauthorized modification of this file could cause Denial of Service to authorized cron users or 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 cron.allow file. ls -lL /private/var/at/cron.allow If the file exists and is not group owned by wheel, this is a finding.

Fix text

Open a terminal session and enter the following command. chgrp wheel /private/var/at/cron.allow

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