Directory traversal vulnerability in upload.dll in BadBlue 2.72b and earlier allows remote attackers to create or overwrite arbitrary files via a .. (dot dot) in the filename parameter.
http://www.vupen.com/english/advisories/2007/4160
http://www.securityfocus.com/archive/1/484834/100/0/threaded
http://securityreason.com/securityalert/3448