Unspecified vulnerability in the image decoder in Adobe Acrobat 9.x before 9.2, and possibly 7.x through 7.1.4 and 8.x through 8.1.7, allows attackers to cause a denial of service or possibly execute arbitrary code via unknown vectors. Per: http://www.adobe.com/support/security/bulletins/apsb09-15.html
This update resolves an image decoder issue that leads to a Denial of Service (DoS); arbitrary code execution has not been demonstrated, but may be possible. This issue is specific to Acrobat and does not affect Adobe Reader. (CVE-2009-2984).
NOTE: this issue is resolved in the Acrobat 9.2 update. Per: http://www.adobe.com/support/security/bulletins/apsb09-15.html
Solution
Acrobat
Acrobat Standard and Pro users on Windows can find the appropriate update here:
http://www.adobe.com/support/downloads/product.jsp?product=1&platform=Windows.
Acrobat Pro Extended users on Windows can find the appropriate update here: http://www.adobe.com/support/downloads/product.jsp?product=158&platform=Windows
Acrobat 3D users on Windows can find the appropriate update here:
http://www.adobe.com/support/downloads/product.jsp?product=112&platform=Windows.
Acrobat Pro users on Macintosh can find the appropriate update here:
http://www.adobe.com/support/downloads/product.jsp?product=1&platform=Macintosh.