Directory traversal vulnerability in Unreal Tournament Server 436 and earlier allows remote attackers to access known files via a ".." (dot dot) in an unreal:// URL.
https://exchange.xforce.ibmcloud.com/vulnerabilities/11299
http://www.securityfocus.com/bid/6775
http://archives.neohapsis.com/archives/bugtraq/2003-02/0142.html
http://archives.neohapsis.com/archives/bugtraq/2003-02/0063.html