Microsoft Internet Explorer CElement::DelMarkupPtr Type Confusion Remote Code Execution Vulnerability

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 vulnerability relates to how Internet Explorer stores pointers to CMarkup objects. By manipulating a document’s elements an attacker can force a pointer to a CSecurityContext object in memory to be interpreted as a pointer to a CMarkup object. An attacker can leverage this vulnerability to execute code under the context of the current process.