The aliases 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-38128r1_rule The aliases file must be group-owned by wheel.

Vulnerability discussion

If the alias file is not group-owned by a system group, an unauthorized user may modify the file to add aliases to run malicious code or redirect email.

Check content

Open a terminal session and use the following command to verify the group ownership of the /etc/aliases file. ls -lL /etc/aliases If the /etc/aliases 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 /etc/aliases

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