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The aliases file must be group-owned by root, sys, bin, or system.


Overview

Finding ID Version Rule ID IA Controls Severity
V-22438 GEN004370 SV-26684r1_rule ECLP-1 Medium
Description
If the alias file is not group-owned by root or a system group, an unauthorized user may modify the file to add aliases to run malicious code or redirect email.
STIG Date
UNIX SRG 2013-03-26

Details

Check Text ( C-27706r1_chk )
Check the group ownership of the /etc/mail/aliases file.

Procedure:
# ls -lL /etc/mail/aliases

If the file is not group-owned by root, sys, bin, or system, this is a finding.
Fix Text (F-23923r1_fix)
Change the group owner of the /etc/mail/aliases file.

Procedure:
# chgrp root /etc/mail/aliases