WebKit, as used in Apple iTunes before 10.7, allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site, a different vulnerability than other WebKit CVEs listed in APPLE-SA-2012-09-12-1.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17523
https://exchange.xforce.ibmcloud.com/vulnerabilities/78536
http://www.securityfocus.com/bid/55534
http://support.apple.com/kb/HT5642
http://support.apple.com/kb/HT5502
http://support.apple.com/kb/HT5485
http://lists.apple.com/archives/security-announce/2013/Jan/msg00000.html
http://lists.apple.com/archives/security-announce/2012/Sep/msg00005.html
http://lists.apple.com/archives/security-announce/2012/Sep/msg00001.html