Adobe Flash Player ActionScript DisplayObject Layout Memory Corruption Vulnerability

06.08.12

BACKGROUND

Adobe Flash Player is an application for viewing animations and movies using computer programs such as a Web browser; in common use, Flash lets users put animation and movies on a website. Flash Player runs SWF files that can be created by the Adobe Flash authoring tool, by Adobe Flex or by a number of other third-party tools. For more information, please visit the following website: http://www.adobe.com/products/flashplayer/.

DESCRIPTION

Remote exploitation of a memory corruption vulnerability in Adobe Systems Inc.'s Flash Player could allow an attacker to execute arbitrary code with the privileges of the current user. The vulnerability occurs when parsing a maliciously formatted sequence of ActionScript code inside of an Adobe Flash file. When the ActionScript code manipulates the Flash DOM objects in certain ways, it is possible to trigger a memory corruption vulnerability. This can lead to the execution of arbitrary code.

ANALYSIS

Exploitation of this vulnerability results in the execution of arbitrary code with the privileges of the user viewing the Web page. To exploit this vulnerability, a targeted user must load a malicious Web page that an attacker creates. An attacker typically accomplishes this via social engineering or injecting content into compromised, trusted sites. After the user visits the malicious Web page, no further user interaction is needed.

DETECTION

The following versions of Flash Player are vulnerable:

Adobe Flash Player 11.2.202.235 and earlier versions for Windows, Macintosh and Linux operating systems
Adobe Flash Player 11.1.115.8 and earlier versions for Android 4.x, and Adobe Flash Player 11.1.111.9 and earlier versions for Android 3.x and 2.x
Adobe AIR 3.2.0.2070 and earlier versions for Windows, Macintosh and Android

WORKAROUND

Disable or uninstall Flash Player, or only allow it to run from trusted websites. This can be performed by changing the permissions on the Flash plug-in binary or by browser plug-in configuration options.

VENDOR RESPONSE

Microsoft Corp. has released patches which addresses this issue. For more information, consult their advisory at the following URL:

http://www.adobe.com/support/security/bulletins/apsb12-14.html

CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2012-2034 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems.

DISCLOSURE TIMELINE

02/29/2012 Initial Vendor Notification
02/29/2012 Initial Vendor Reply
06/08/2012 Coordinated Public Disclosure

CREDIT

This vulnerability was reported to iDefense by wushi of team509.

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LEGAL NOTICES

Copyright © 2012 Verisign, Inc.

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Disclaimer: The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.