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

2015-06-11T00:00:00
ID ZDI-15-254
Type zdi
Reporter 0016EECD9D7159A949DAD3BC17E0A939
Modified 2015-11-09T00:00:00

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 vulnerability relates to how Internet Explorer processes HTML option elements that are placed inside datalist elements. By manipulating a document's elements an attacker can force a COptionElement object in memory to be reused after it has been freed. An attacker can leverage this vulnerability to execute code under the context of the current process.