Apple QuickTime Player before 7.0.3 allows user-assisted attackers to cause a denial of service (crash) via a crafted file with a missing movie attribute, which leads to a null dereference.
http://www.vupen.com/english/advisories/2005/2293
http://www.securityfocus.com/bid/15307
http://www.securityfocus.com/archive/1/415717/30/0/threaded
http://securitytracker.com/id?1015152
http://securityreason.com/securityalert/145
http://secunia.com/advisories/17428
http://pb.specialised.info/all/adv/quicktime-mov-dos-adv.txt
http://docs.info.apple.com/article.html?artnum=302772
http://archives.neohapsis.com/archives/fulldisclosure/2005-11/0102.html