mod_channel.bas in The Ignition Project ignitionServer 0.3.0 to 0.3.6, and possibly earlier versions, does not properly verify whether a host has the owner privileges required to delete IRC channel access entries, which allows remote attackers to bypass intended restrictions.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2005-1642
http://www.ignition-project.com/security/20050414-hosts-delete-owner-access-entries