Microsoft Internet Explorer 8 use-after-free vulnerability

Overview

Microsoft Internet Explorer 8 is susceptible to a use-after-free vulnerability in the mshtml.dll library.

Description

The use-after-free vulnerability is triggered when handling circular memory references. Full details of the crash can be found at Michal Zalewski’s website. Additional details about the fuzzer used to find this vulnerability can be found at Michal Zalewski’s blog.

---

Impact

An attacker can cause the browser to crash and may be able to execute arbitrary code as the user.

---

Solution

We are currently unaware of a practical solution to this problem.

---

Internet Explorer users should take advantage of the mitigations provided in Microsoft’s Enhanced Mitigation Experience Toolkit.

---

Vendor Information

427980

Filter by status: All Affected Not Affected Unknown

Filter by content: __ Additional information available

__ Sort by: Status Alphabetical

Expand all

Javascript is disabled. Click here to view vendors.

Microsoft Corporation Affected

Updated: January 06, 2011

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://lcamtuf.blogspot.com/2011/01/announcing-crossfuzz-potential-0-day-in.html&gt;
• <http://seclists.org/fulldisclosure/2011/Jan/1&gt;
• <http://lcamtuf.coredump.cx/cross_fuzz/msie_crash.txt&gt;
• <http://msdn.microsoft.com/en-us/library/dd361842(v=vs.85).aspx&gt;
• <http://blogs.technet.com/b/srd/archive/2010/09/02/enhanced-mitigation-experience-toolkit-emet-v2-0-0.aspx&gt;

Acknowledgements

This vulnerability was reported to the public by Michal Zalewski.

This document was written by Jared Allar.

Other Information

CVE IDs:	CVE-2011-0346
Severity Metric:	1.11 Date Public: