The alias file must have mode 0644 or less permissive.

From AIX 6.1 Security Technical Implementation Guide

Part of GEN004380

Associated with IA controls: ECLP-1

Associated with: CCI-000225

SV-40684r1_rule The alias file must have mode 0644 or less permissive.

Vulnerability discussion

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.

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Fix text

Change the mode of the /etc/mail/aliases file. Procedure: # chmod 0644 /etc/mail/aliases

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