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Check: GEN004360

SUSE Linux Enterprise Server v11 for System z STIG: GEN004360 (in versions v1 r12 through v1 r9)

Title

The alias file must be owned by root. (Cat II impact)

Discussion

If the alias file is not owned by root, an unauthorized user may modify the file adding aliases to run malicious code or redirect e-mail.

Check Content

Check the ownership of the alias files. Procedure: for sendmail: # ls -lL /etc/aliases # ls -lL /etc/aliases.db If all the files are not owned by root, this is a finding. for postfix: Verify the location of the alias file. # postconf alias_maps This will return the location of the "aliases" file. # ls -lL <postfix aliases file> # ls -lL <postfix aliases.db file> If all the files are not owned by root, this is a finding.

Fix Text

Change the owner of the /etc/aliases file to root. Procedure: for sendmail: # chown root /etc/aliases # chown root /etc/aliases.db for postfix # chown root <postfix aliases file> # chown root <postfix aliases.db file>

Additional Identifiers

Rule ID: SV-45827r1_rule

Vulnerability ID: V-831

Group Title: GEN004360

Expert Comments

Expert comments are only available to logged-in users.

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