The aliases file must be group-owned by wheel.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22438	GEN004370 M6	SV-38128r1_rule	ECLP-1	Medium

Description
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.

STIG	Date
MAC OSX 10.6 Workstation Security Technical Implementation Guide Draft	2013-01-10

Details

Check Text ( C-37666r1_chk )
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 (F-32907r1_fix)
Open a terminal session and enter the following command to set the group. chgrp wheel /etc/aliases