Use-after-free vulnerability in the CMshtmlEd::Exec function in mshtml.dll in Microsoft Internet Explorer 6 through 9 allows remote attackers to execute arbitrary code via a crafted web site, as exploited in the wild in September 2012.Referenceshttp://www.us-cert.gov/cas/techalerts/TA12-265A.htmlhttp://www.kb.cert.org/vuls/id/480095https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15729http://www.us-cert.gov/cas/techalerts/TA12-262A.htmlhttp://www.securityweek.com/new-internet-explorer-zero-day-being-exploited-wildhttp://technet.microsoft.com/security/advisory/2757760http://www.us-cert.gov/cas/techalerts/TA12-255A.htmlhttp://blog.vulnhunt.com/index.php/2012/09/17/ie-execcommand-fuction-use-after-free-vulnerability-0day_en/http://dev.metasploit.com/redmine/projects/framework/repository/entry/modules/exploits/windows/browser/ie_execcommand_uaf.rbhttp://www.securitytracker.com/id?1027538http://eromang.zataz.com/2012/09/16/zero-day-season-is-really-not-over-yet/