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

From SOLARIS 10 X86 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with IA controls: ECLP-1

Associated with: CCI-000225

SV-37458r1_rule The aliases file must be group-owned by root, sys, smmsp, or bin.

Vulnerability discussion

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.

Check content

Find the alias files on the system. Procedure: # egrep '^O(A| AliasFile)' /etc/mail/sendmail.cf If the "alias file" is an NIS or LDAP map, this check is not applicable. The default location is /etc/mail/aliases. Check the group ownership of the alias file and the hashed version of it used by sendmail. Procedure: # ls -lL /etc/mail/aliases /etc/mail/aliases.db If the file is not group-owned by root, sys, smmsp, or bin, this is a finding.

Fix text

Change the group owner of the /etc/mail/aliases files. Procedure: # chgrp bin /etc/mail/aliases # chgrp smmsp /etc/mail/aliases.db

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