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

ID ZDI-13-031
Type zdi
Modified 2013-11-09T00:00:00


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 issue lies in the usage of the focus() method on a textArea element. 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.