Adobe Flash Player Out of Bounds Memory Indexing Vulnerability
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 array indexing 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 processing of certain types of Adobe Flash code, a certain function may be tricked into accepting an overly large index argument. The index argument may reference a memory location outside the bounds of memory allocated for an array object. Arbitrary code execution can occur when an index is calculated to point to a sensitive memory location, and the memory location is overwritten with specially crafted values.
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 Shockwave Flash file created by an attacker. An attacker typically accomplishes this via social engineering or injecting content into a compromised, trusted site.
iDefense has confirmed the existence of this vulnerability in the latest version of Flash Player at the time of testing, version 10.0.22.87. Adobe Flash Player versions 10.0.45.2 and prior and Adobe AIR 18.104.22.16830 and prior 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-2010-2161 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems.
08/06/2009 Initial Vendor Notification
08/06/2009 Initial Vendor Reply
06/10/2010 Coordinated Public Disclosure
This vulnerability was reported to iDefense by Vitaliy Toropov.
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