Use-after-free vulnerability in the plugin in Apple QuickTime before 7.7.3 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via an HTML document with a crafted _qtactivex_ parameter in an OBJECT element.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16166
https://exchange.xforce.ibmcloud.com/vulnerabilities/79897
http://support.apple.com/kb/HT5581
http://secunia.com/advisories/51226
http://lists.apple.com/archives/security-announce/2012/Nov/msg00002.html