Buffer overflow in Apple iTunes before 9.2.1 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted itpc: URL.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6988
http://support.apple.com/kb/HT4263
http://lists.apple.com/archives/security-announce/2010//Jul/msg00000.html