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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-40493r1_rule ECLP-1 Medium
Description
If the alias file is not owned by root, an unauthorized user may modify the file to add aliases to run malicious code or redirect email.
STIG Date
SOLARIS 10 X86 SECURITY TECHNICAL IMPLEMENTATION GUIDE 2017-06-21

Details

Check Text ( C-39300r1_chk )
Find the alias file 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 ownership of the alias file.

Procedure:
# ls -lL

If the alias file is not owned by root, this is a finding.
Fix Text (F-34503r1_fix)
Change the owner of the /etc/mail/aliases file (or equivalent, such as /usr/lib/aliases) to root.

Procedure:
# chown root /etc/mail/aliases