Advisory Details

April 18th, 2012

Internet Explorer CTagFactory Use-After-Free Remote Code Execution Vulnerability

CVE ID
CVSS SCORE	7.5, AV:N/AC:L/Au:N/C:P/I:P/A:P
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Internet Explorer 8
TREND MICRO CUSTOMER PROTECTION	Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID ['12230']. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Internet Explorer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page. The specific issue is due to the process re-using a freed CTagFactory object. This can be made to occur by creating a specially crafted t:media element and later removing it. Remote attackers can abuse this to achieve arbitrary code execution under the context of the user running the browser.
ADDITIONAL DETAILS	Microsoft has issued an update to correct this vulnerability. More details can be found at: http://technet.microsoft.com/en-us/security/bulletin/ms12-023
DISCLOSURE TIMELINE	2011-12-19 - Vulnerability reported to vendor 2012-04-18 - Coordinated public release of advisory
CREDIT	Anonymous

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