Adobe Flash Player is a very popular Web browser plugin. It is available for multiple Web browsers and platforms, including Windows, Linux and MacOS. Flash Player enables Web browsers to display rich multimedia content, such as online videos, and is often a requirement for popular websites. For more information, see the vendor's site at the following link.
Remote exploitation of an integer overflow vulnerability in Adobe Systems Inc.'s Flash Player ActionScript Virtual Machine (AVM) could allow an attacker to execute arbitrary code with the privileges of the current user.
Part of the ActionScript Virtual Machine verification stage involves parsing an internal structure called 'method_body_info' for a particular method. This structure contains values that dictate the bounds of a stack for a method.
During the construction of a certain object, an integer overflow may occur when performing a calculation using values supplied from the 'method_body_info' structure.
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.
The following Adobe products are vulnerable:
A Internet Explorer plugin is available to temporarily block and unblock Flash content using a single click. Only trusted sites should be unblocked when using this plugin. More information is available at http://flash.melameth.com.
A Firefox plugin is available to temporarily block and unblock Flash content using a single click. Only trusted sites should be unblocked when using this plugin. More information is available at: http://flashblock.mozdev.org.
Adobe has released a fix which addresses this issue. Information about downloadable vendor updates can be found by clicking on the URLs shown.
The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2011-0618 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems.
12/28/2010 Initial Vendor Notification
12/29/2010 Initial Vendor Reply
05/12/2011 Coordinated Public Disclosure
This vulnerability was reported to iDefense by binaryproof.
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Copyright © 2011 Verisign, Inc.
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