Multiple buffer overflows in Quake II server before R1Q2, as used in multiple products, allow local users to cause a denial of service (application crash) via the server console or rcon.
https://exchange.xforce.ibmcloud.com/vulnerabilities/17898
http://web.archive.org/web/20041130092749/www.r1ch.net/stuff/r1q2/
http://securitytracker.com/id?1011979
http://secur1ty.net/advisories/001
http://archives.neohapsis.com/archives/bugtraq/2004-10/0299.html