The alias file must be owned by root.

From SUSE Linux Enterprise Server v11 for System z

Associated with: CCI-000225

SV-45827r1_rule The alias file must be owned by root.

Vulnerability 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 # ls -lL 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 # chown root

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