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Mozilla Firefox "imgRequestProxy" Class Remote Use-After-Free

Mozilla Firefox "imgRequestProxy" Class Remote Use-After-Free
Posted Nov 30, 2012
Authored by Nicolas Joly, VUPEN | Site vupen.com

VUPEN Vulnerability Research Team discovered a critical vulnerability in Mozilla Firefox. The vulnerability is caused by a use-after-free error within the "imgRequestProxy::OnStopRequest()" function, which could allow remote attackers to execute arbitrary code via a specially crafted web page.

tags | advisory, remote, web, arbitrary
SHA-256 | 6ff9c9465d128e7723f00c6eb8b2c513970c66279404d1491f6201d4b7ded1cd

Mozilla Firefox "imgRequestProxy" Class Remote Use-After-Free

Change Mirror Download
VUPEN Security Research - Mozilla Firefox "imgRequestProxy" Class Remote
Use-After-Free Vulnerability

Website : http://www.vupen.com

Twitter : http://twitter.com/vupen


I. BACKGROUND
---------------------

Mozilla Firefox is a free and open source web browser and coordinated by
Mozilla Corporation and Mozilla Foundation. As of August 2012, Firefox
has approximately 23% of worldwide usage share of web browsers (Wikipedia)


II. DESCRIPTION
---------------------

VUPEN Vulnerability Research Team discovered a critical vulnerability
in Mozilla Firefox.

The vulnerability is caused by a use-after-free error within the
"imgRequestProxy::OnStopRequest()" function, which could allow remote
attackers to execute arbitrary code via a specially crafted web page.

CVSS Score: 10 (AV:N/AC:L/Au:N/C:C/I:C/A:C)


III. AFFECTED PRODUCTS
---------------------------

Mozilla Firefox versions prior to 17.0
Mozilla Firefox ESR versions prior to 10.0.11
Mozilla Thunderbird versions prior to 17.0
Mozilla Thunderbird ESR versions prior to 10.0.11
Mozilla SeaMonkey versions prior to 2.14


IV. Binary Analysis & Exploits/PoCs
---------------------------------------

In-depth technical analysis of the vulnerability and a fully functional
remote code execution exploit are available through the VUPEN BAE
(Binary Analysis & Exploits) portal:

http://www.vupen.com/english/services/ba-index.php

VUPEN Binary Analysis & Exploits Service provides private exploits and
in-depth technical analysis of the most significant public vulnerabilities
based on disassembly, reverse engineering, protocol analysis, and code
audit.

The service allows governments and major corporations to evaluate risks, and
protect infrastructures and assets against new threats. The service also
allows security vendors (IPS, IDS, AntiVirus) to supplement their internal
research efforts and quickly develop both vulnerability-based and
exploit-based signatures to proactively protect their customers from attacks
and emerging threats.


V. VUPEN Threat Protection Program
-----------------------------------

Governments and major corporations which are members of the VUPEN Threat
Protection Program (TPP) have been proactively alerted about the
vulnerability
when it was discovered by VUPEN in advance of its public disclosure, and
have received a detailed attack detection guidance to protect national and
critical infrastructures against potential 0-day attacks exploiting this
vulnerability:

http://www.vupen.com/english/services/tpp-index.php


VI. SOLUTION
----------------

Upgrade to Firefox 17.0, Firefox ESR 10.0.11, Thunderbird 17.0, Thunderbird
ESR 10.0.11 or SeaMonkey 2.14.


VII. CREDIT
--------------

This vulnerability was discovered by Nicolas Joly of VUPEN Security


VIII. ABOUT VUPEN Security
---------------------------

VUPEN is the leadering provider of advanced vulnerability research for
defensive and offensive cyber security. VUPEN solutions enable corporations
and governments to measure and manage risks, eliminate vulnerabilities
before they can be exploited, and protect critical infrastructures and
assets against known and unknown vulnerabilities.

VUPEN has been recognized as "Company of the Year 2011 in the Vulnerability
Research Market" by Frost & Sullivan.

VUPEN solutions include:

* VUPEN Binary Analysis & Exploits Service (BAE) :
http://www.vupen.com/english/services/ba-index.php

* VUPEN Threat Protection Program (TPP) :
http://www.vupen.com/english/services/tpp-index.php


IX. REFERENCES
----------------------

http://www.mozilla.org/security/announce/
http://www.vupen.com/english/research.php


X. DISCLOSURE TIMELINE
-----------------------------

2012-09-10 - Vulnerability Discovered by VUPEN and shared with customers
2012-11-22 - Public disclosure



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