Advisory Details

February 14th, 2013

Microsoft Internet Explorer CHTML Use-After-Free Remote Code Execution Vulnerability

CVE ID	CVE-2013-0029
CVSS SCORE	6.8, AV:N/AC:M/Au:N/C:P/I:P/A:P
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Internet Explorer
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 CSelectionManager objects. The issues lies in the usage of an onbeforedeactivate event handler. 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: http://technet.microsoft.com/en-us/security/bulletin/MS13-009
DISCLOSURE TIMELINE	2012-12-10 - Vulnerability reported to vendor 2013-02-14 - Coordinated public release of advisory
CREDIT	Stephen Fewer of Harmony Security (www.harmonysecurity.com)

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