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

From Oracle Linux 5 Security Technical Implementation Guide

Associated with: CCI-000225

SV-64309r1_rule The at.deny file must be group-owned by root, bin, sys, or cron.

Vulnerability discussion

If the group owner of the at.deny file is not set to root, 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.

Check content

Check the group ownership of the file. Procedure: # ls -lL /etc/at.deny If the file is not group-owned by root, bin, sys, or cron, this is a finding.

Fix text

Change the group ownership of the at.deny file to root, sys, bin, or cron. Procedure: # chgrp root /etc/at.deny

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