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Adobe Flash Player Integer Overflow

08.09.11

BACKGROUND

Adobe Flash Player is an application for viewing animations and movies using computer programs such as a Web browser; in common usage, Flash lets you 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 Macromedia and third-party tools. For more information, please visit following website:

http://www.adobe.com/products/flashplayer/

DESCRIPTION

Remote exploitation of an integer overflow vulnerability in Adobe Systems Inc.'s Flash Player could allow an attacker to execute arbitrary code with the privileges of the current user.

During the allocation of an array within a certain internal ActionScript function, a size calculation may cause an integer value to overflow. This condition may lead to the bounds of an undersized array being overflown during a memory copy operation. This can result in arbitrary code execution.

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 Flash file created by an attacker. An attacker typically accomplishes this via social engineering or injecting content into a compromised, trusted site.

DETECTION

The following Adobe Products are vulnerable:

  • Adobe Flash Player 10.3.181.36 and earlier versions for Windows, Macintosh, Linux and Solaris operating systems
  • Adobe Flash Player 10.3.185.25 and earlier versions for Android
  • Adobe AIR 2.7 and earlier versions for Windows, Macintosh and Android

WORKAROUND

Disable Flash Player plugin by restricting access to Flash Player files, which is usually under C:WINDOWSsystem32MacromedFlash

VENDOR RESPONSE

Adobe has released a fix which addresses this issue. Information about downloadable vendor updates can be found by clicking on the URLs shown.

http://www.adobe.com/support/security/bulletins/apsb11-21.html

CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2011-2416 and CVE-2011-2136 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

04/27/2011 Initial Vendor Notification
04/27/2011 Vendor Reply
08/09/2011 Coordinated Public Disclosure

CREDIT

This vulnerability was reported to iDefense by Vitaliy Toropov.

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LEGAL NOTICES

Copyright © 2011 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.