Advisory Details

April 23rd, 2014

Microsoft Internet Explorer CMarkup Undo execCommand Use-After-Free Remote Code Execution Vulnerability

CVE ID	CVE-2014-0290
CVSS SCORE	6.8, AV:N/AC:M/Au:N/C:P/I:P/A:P
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Internet Explorer
TREND MICRO CUSTOMER PROTECTION	Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID ['13549']. 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 or open a malicious file. The specific flaw exists within the handling of CMarkup objects. The issue lies in the use of the Undo execCommand. By manipulating a document's elements an attacker can force a dangling pointer to be reused after it has been freed. An attacker can leverage this vulnerability to execute code under the context of the current process.
ADDITIONAL DETAILS	Microsoft has issued an update to correct this vulnerability. More details can be found at: https://technet.microsoft.com/en-us/library/security/ms14-010.aspx
DISCLOSURE TIMELINE	2014-01-31 - Vulnerability reported to vendor 2014-04-23 - Coordinated public release of advisory
CREDIT	Yuki Chen of Trend Micro

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