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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.

• http://www.us-cert.gov/cas/techalerts/TA12-265A.html third-party-advisoryx_refsource_CERT
• http://www.kb.cert.org/vuls/id/480095 third-party-advisoryx_refsource_CERT-VN
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15729 vdb-entrysignaturex_refsource_OVAL
• http://www.us-cert.gov/cas/techalerts/TA12-262A.html third-party-advisoryx_refsource_CERT
• http://www.securityweek.com/new-internet-explorer-zero-day-being-exploited-wild x_refsource_MISC
• http://technet.microsoft.com/security/advisory/2757760 x_refsource_CONFIRM
• http://www.us-cert.gov/cas/techalerts/TA12-255A.html third-party-advisoryx_refsource_CERT
• http://blog.vulnhunt.com/index.php/2012/09/17/ie-execcommand-fuction-use-after-free-vulnerability-0day_en/ x_refsource_MISC
• http://dev.metasploit.com/redmine/projects/framework/repository/entry/modules/exploits/windows/browser/ie_execcommand_uaf.rb x_refsource_MISC
• http://www.securitytracker.com/id?1027538 vdb-entryx_refsource_SECTRACK
• http://eromang.zataz.com/2012/09/16/zero-day-season-is-really-not-over-yet/ x_refsource_MISC
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2012-4969 government-resource