The remote host is missing an update to the system as announced in the referenced advisory.
Update your system with the appropriate patches or software upgrades. http://security.lss.hr/en/index.php?page=details&ID=LSS-2004-11-03 http://www.gotbnc.com/changes.html http://marc.theaimsgroup.com/?l=bugtraq&m=110011817627839 http://www.vuxml.org/freebsd/9be819c6-4633-11d9-a9e7-0001020eed82.html
The following package is affected: bnc CVE-2004-1052 Buffer overflow in the getnickuserhost function in BNC 2.8.9, and possibly other versions, allows remote IRC servers to execute arbitrary code via an IRC server response that contains many (1) ! (exclamation) or (2) @ (at sign) characters.