Files executed through a mail aliases file must have mode 0755 or less permissive.

From SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide

Associated with: CCI-000225

SV-45853r2_rule Files executed through a mail aliases file must have mode 0755 or less permissive.

Vulnerability discussion

If a file executed through a mail aliases file has permissions greater than 0755, it can be modified by an unauthorized user and may contain malicious code or instructions potentially compromising the system.

Check content

If the “sendmail” package is not installed, this is not applicable. Examine the contents of the /etc/aliases file. Procedure: # more /etc/aliases Examine the aliases file for any utilized directories or paths. # ls -lL Check the permissions for any paths referenced. If any file referenced from the aliases file has a mode more permissive than 0755, this is a finding.

Fix text

Use the chmod command to change the access permissions for files executed from the alias file. For example: # chmod 0755 filename.

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