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The alias file must not have an extended ACL.


Overview

Finding ID Version Rule ID IA Controls Severity
V-22439 GEN004390 M6 SV-38131r1_rule ECLP-1 Medium
Description
Excessive permissions on the aliases file may permit unauthorized modification. If the alias file is modified by an unauthorized user, they may modify the file 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-37668r1_chk )
Open a terminal session and enter the following command to view the /etc/aliases file extended ACLs.

ls -lL /etc/aliases

If the permissions include a '+', the file has an extended ACL, this is a finding.
Fix Text (F-32908r1_fix)
Open a terminal session and enter the following command to remove the extended ACLs.

chmod -N /etc/aliases