Critical vulnerabilities have been identified in Adobe Reader 9.3.3 (and earlier versions) for Windows, Macintosh and UNIX, Adobe Acrobat 9.3.3 (and earlier versions) for Windows and Macintosh, and Adobe Reader 8.2.3 (and earlier versions) and Adobe Acrobat 8.2.3 (and earlier versions) for Windows and Macintosh. These vulnerabilities could cause the application to crash and could potentially allow an attacker to take control of the affected system.

Adobe recommends users of Adobe Reader 9.3.3 and earlier versions for Windows, Macintosh and UNIX update to Adobe Reader 9.3.4. (For Adobe Reader users on Windows and Macintosh, who cannot update to Adobe Reader 9.3.4, Adobe has provided the Adobe Reader 8.2.4 update.) Adobe recommends users of Adobe Acrobat 9.3.3 and earlier versions for Windows and Macintosh update to Adobe Acrobat 9.3.4. Adobe recommends users of Adobe Acrobat 8.2.3 and earlier versions for Windows and Macintosh update to Adobe Acrobat 8.2.4.

Adobe Reader
Users can utilize the product's update mechanism. The default configuration is set to run automatic update checks on a regular schedule and can be manually activated by choosing Help > Check for Updates.

Adobe Reader users on Windows can also find the appropriate update here:
http://www.adobe.com/support/downloads/product.jsp?product=10&platform=Windows.

Adobe Reader users on Macintosh can also find the appropriate update here:
http://www.adobe.com/support/downloads/product.jsp?product=10&platform=Macintosh.

Adobe Reader users on UNIX can find the appropriate update here:
http://www.adobe.com/support/downloads/product.jsp?product=10&platform=Unix.

Note: Adobe Reader 9.3.4 for Windows, Macintosh and UNIX will be available from the Adobe Reader Download Center at http://get.adobe.com/reader/ by August 31, 2010.

Adobe Acrobat 
Users can utilize the product's update mechanism. The default configuration is set to run automatic update checks on a regular schedule and can be manually activated by choosing Help > Check for Updates.

Acrobat Standard and Pro users on Windows can also find the appropriate update here:
http://www.adobe.com/support/downloads/product.jsp?product=1&platform=Windows.

Acrobat Pro Extended users on Windows can also find the appropriate update here: http://www.adobe.com/support/downloads/product.jsp?product=158&platform=Windows.

Acrobat 3D users on Windows can also find the appropriate update here:
http://www.adobe.com/support/downloads/product.jsp?product=112&platform=Windows.

Acrobat Pro users on Macintosh can also find the appropriate update here:
http://www.adobe.com/support/downloads/product.jsp?product=1&platform=Macintosh.

For more information see the Adobe Security Bulletin (http://www.adobe.com/support/security/bulletins/apsb10-17.html).