The at.deny file must be group-owned by system, bin, sys, or cron.

From AIX 6.1 Security Technical Implementation Guide

Associated with IA controls: ECLP-1

Associated with: CCI-000225

SV-39356r1_rule The at.deny file must be group-owned by system, bin, sys, or cron.

Vulnerability discussion

If the group owner of the at.deny file is not set to system, bin, sys, or cron, unauthorized users could be allowed to view or edit sensitive information contained within the file. Unauthorized modification could result in Denial of Service to authorized at users or provide unauthorized users with the ability to run at jobs.

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Change the group owner of the at.deny file to bin, sys, system, or cron. Procedure: # chgrp cron /var/adm/cron/at.deny

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