The alias file must be owned by root.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-226930	GEN004360	SV-226930r858547_rule		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 SPARC Security Technical Implementation Guide	2022-09-07

Details

Check Text ( C-29092r858546_chk )
Note: If sendmail is not installed, this requirement is not applicable. 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 /etc/mail/aliases /etc/mail/aliases.db If the alias files are not owned by root, this is a finding.

Check Text ( C-29092r858546_chk )

Note: If sendmail is not installed, this requirement is not applicable.

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 /etc/mail/aliases /etc/mail/aliases.db

If the alias files are not owned by root, this is a finding.

Fix Text (F-29080r485097_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