The hosts.lpd (or equivalent) file must be group-owned by root, bin, sys, or system.

From Red Hat Enterprise Linux 5 Security Technical Implementation Guide

Part of GEN003930

Associated with IA controls: ECLP-1

Associated with: CCI-000225

SV-37449r1_rule The hosts.lpd (or equivalent) file must be group-owned by root, bin, sys, or system.

Vulnerability discussion

Failure to give group-ownership of the hosts.lpd file to root, bin, sys, or system provides the members of the owning group and possible unauthorized users, with the potential to modify the hosts.lpd file. Unauthorized modifications could disrupt access to local printers from authorized remote hosts or permit unauthorized remote access to local printers.

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Change the group-owner of the printers.conf file. Procedure: # chgrp lp /etc/cups/printers.conf

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