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

2013-05-29T00:00:00
ID ZDI-13-082
Type zdi
Reporter SkyLined
Modified 2013-11-09T00:00:00

Description

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 issue is due to the way anchor elements are handled. When parsing occurs, the process can be made to delete an object resulting is a dangling pointer. The process can be later forced to reuse this pointer resulting in a use-after-free condition. An attacker can leverage this situation to execute code under the context of the user running the browser.