Untrusted search path vulnerability in the Picture Viewer in Apple QuickTime before 7.6.8 allows local users, and possibly remote attackers, to execute arbitrary code and conduct DLL hijacking attacks via a Trojan horse (1) CoreVideo.dll, (2) CoreGraphics.dll, or (3) CoreAudioToolbox.dll that is located in the same folder as a .pic image file.
http://www.fortiguard.com/advisory/FGA-2010-46/
http://support.apple.com/kb/HT4339
http://lists.apple.com/archives/security-announce/2010/Sep/msg00003.html