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The alias file must have mode 0644 or less permissive.


Overview

Finding ID Version Rule ID IA Controls Severity
V-832 GEN004380 SV-832r6_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
Draft AIX Security Technical Implementation Guide 2011-08-17

Details

Check Text ( C-8032r2_chk )
Find the aliases file on the system.
Procedure:
# find / -name aliases -depth -print

Check the mode of the alias file.
Procedure:
# ls –lL

If the alias file has a mode more permissive than 0644, this is a finding.
Fix Text (F-986r3_fix)
Change the mode of the /etc/mail/aliases file (or equivalent, such as /usr/lib/aliases) to 0644.

Procedure:
# chmod 0644 /etc/aliases