VUPEN Security Research - Adobe Flash Player ActionScript FileReference Buffer Overflow (APSB11-21)

2011-08-1700:00:00

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VUPEN Security Research - Adobe Flash Player ActionScript FileReference
Buffer Overflow (APSB11-21)

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." from Adobe.com

II. DESCRIPTION

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

The vulnerability is caused by a buffer overflow error when processing a
malformed ActionScript FileReference method, which could be exploited by
remote attackers to compromise a vulnerable system by tricking a user
into visiting a specially crafted web page.

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

CVE: CVE-2011-2137

III. AFFECTED PRODUCTS

Adobe Flash Player v10.3.181.34 and prior
Adobe Flash Player v10.3.185.25 and prior for Android
Adobe AIR version 2.7 and prior

IV. Binary Analysis & Exploits/PoCs

In-depth binary analysis of the vulnerability and a code execution exploit
are available through the VUPEN Binary Analysis & Exploits Service :

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

To proactively protect critical networks and infrastructures against
unpatched
vulnerabilities and reduce risks related to zero-day attacks, VUPEN shares
its
vulnerability research with governments and organizations members of the
VUPEN
Threat Protection Program (TPP).

VUPEN TPP customers receive fully detailed and technical reports about
security
vulnerabilities discovered by VUPEN and in advance of their public
disclosure.

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

VI. SOLUTION

Upgrade to Adobe Flash Player v10.3.183.5 :
http://www.adobe.com/go/getflash

Upgrade to Adobe Flash Player v10.3.186.3 for Android :
market://details?id=com.adobe.flashplayer

Upgrade to Adobe AIR v2.7.1 :
http://get.adobe.com/air

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 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 recently recognized as "Entrepreneurial Company of the Year
in the Vulnerability Research Market (2011)" by Frost & Sullivan.

VUPEN solutions include: