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Check: GEN004370

IRIX 6.5: GEN004370 (in versions v1 r1 through v1 r0.99)

Title

The aliases file must be group-owned by root, sys, smmsp, or bin. (Cat II impact)

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: Check the group ownership of the alias file and the hashed version of it used by sendmail. Procedure: # ls -lL /etc/aliases 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/aliases

Additional Identifiers

Rule ID:

Vulnerability ID: V-22438

Group Title:

Expert Comments

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CCIs

CCIs tied to check.

Number	Definition
CCI-000225	The organization employs the concept of least privilege, allowing only authorized accesses for users (and processes acting on behalf of users) which are necessary to accomplish assigned tasks in accordance with organizational missions and business functions.

Controls

Controls tied to check. These are derived from the CCIs shown above.

Number	Title
AC-6	Least Privilege