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The alias file must be owned by root.


Overview

Finding ID Version Rule ID IA Controls Severity
V-831 GEN004360 SV-37472r2_rule ECLP-1 Medium
Description
If the alias file is not owned by root, an unauthorized user may modify the file adding aliases to run malicious code or redirect e-mail.
STIG Date
Red Hat Enterprise Linux 5 Security Technical Implementation Guide 2014-07-02

Details

Check Text ( None )
None
Fix Text (F-31384r1_fix)
Change the owner of the /etc/aliases file to root.

Procedure:
for sendmail:
# chown root /etc/aliases
# chown root /etc/aliases.db

for postfix
# chown root /etc/postfix/aliases
# chown root /etc/postfix/aliases.db