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Adobe Flash Player "SAlign" Memory Corruption

Adobe Flash Player "SAlign" Memory Corruption
Posted Dec 19, 2011
Authored by Nicolas Joly, VUPEN | Site vupen.com

VUPEN Vulnerability Research Team discovered a vulnerability in Adobe Flash Player. The vulnerability is caused by an uninitialized stack variable when processing an invalid "SAlign" property of the Flash ActiveX control, which could be exploited by remote attackers to compromise a vulnerable system via a specially crafted web page. Versions prior to 11.1.102.55 are affected.

tags | advisory, remote, web, activex
advisories | CVE-2011-2459
MD5 | e073735e78894c1bef81c32816fbbfcd

Adobe Flash Player "SAlign" Memory Corruption

Change Mirror Download
VUPEN Security Research - Adobe Flash Player "SAlign" Memory Corruption 
Vulnerability (CVE-2011-2459)

Website : http://www.vupen.com/english/research.php

Twitter : http://twitter.com/vupen


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

Adobe Flash Player is a cross-platform browser-based application runtime
that delivers uncompromised viewing of expressive applications, content,
and videos across screens and browsers. Flash Player delivers breakthrough
web experiences to over 98% of Internet users.


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

VUPEN Vulnerability Research Team discovered a vulnerability in Adobe
Flash Player.

The vulnerability is caused by an uninitialized stack variable when
processing an invalid "SAlign" property of the Flash ActiveX control,
which could be exploited by remote attackers to compromise a vulnerable
system via a specially crafted web page.


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

Adobe Flash Player versions prior to 11.1.102.55


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

In-depth binary analysis of the vulnerability and a proof-of-concept code
are available through the VUPEN 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 Adobe Flash Player version 11.1.102.55


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

This vulnerability was discovered by Nicolas Joly of VUPEN Security


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

VUPEN is the world leader in 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.adobe.com/support/security/bulletins/apsb11-28.html
http://www.vupen.com/english/research.php


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

2011-01-27 - Vulnerability Discovered by VUPEN and shared with TPP customers
2011-12-16 - Public disclosure

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