Common Unix Printing System (CUPS) 1.1.14 through 1.1.17 allows remote attackers to add printers without authentication via a certain UDP packet, which can then be used to perform unauthorized activities such as stealing the local root certificate for the administration server via a "need authorization" page, as demonstrated by new-coke.
https://exchange.xforce.ibmcloud.com/vulnerabilities/10908
http://www.securityfocus.com/bid/6436
http://www.redhat.com/support/errata/RHSA-2002-295.html
http://www.novell.com/linux/security/advisories/2003_002_cups.html
http://www.mandrakesoft.com/security/advisories?name=MDKSA-2003:001
http://www.debian.org/security/2003/dsa-232
http://marc.info/?l=bugtraq&m=104032149026670&w=2
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000702
http://archives.neohapsis.com/archives/vulnwatch/2002-q4/0117.html