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Check: GEN003050 M6

MACOSX 10.6: GEN003050 M6 (in version v1 r3)

Title

Crontab files must be group-owned by wheel, cron, 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

Open a terminal session and enter the following commands to verify the group ownership of the "crontab" files. ls -lL /usr/sbin/cron ls -lL /usr/lib/cron ls -lL /usr/bin/crontab ls -lL /private/var/at/cron.deny If the group-owner is not wheel or the crontab owner's primary group, this is a finding.

Fix Text

Open a terminal session and enter the following command to set the group to wheel. chgrp wheel <crontab file>

Additional Identifiers

Rule ID: SV-38107r1_rule

Vulnerability ID: V-22385

Group Title:

Expert Comments

Expert comments are only available to logged-in users.

CCIs

CCIs tied to check.

Number	Definition
CCI-000225	The organization employs the concept of least privilege, allowing only authorized accesses for users (and processes acting on behalf of users) which are necessary to accomplish assigned tasks in accordance with organizational missions and business functions.

Controls

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

Number	Title
AC-6	Least Privilege