Microsoft Internet Explorer Element Tags Vulnerability

2007-12-11T00:00:00
ID ZDI-07-075
Type zdi
Reporter Peter Vreugdenhil
Modified 2007-11-09T00:00:00

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.

The specific flaw exists in the handling of document objects that have been created, modified, deleted then accessed by JavaScript. By storing references to document nodes, then removing them by a separate reference, the document model in memory becomes unstable. Accessing the tags property while the document is in this unstable condition results in a heap corruption, allowing the execution of arbitrary code.