CVE 2009-1492
The getAnnots Doc method in the JavaScript API in Adobe Reader and Acrobat 9.1, 8.1.4, 7.1.1, and earlier allows remote attackers to cause a denial of service (memory corruption) or execute arbitrary code via a PDF file that contains an annotation, and has an OpenAction entry with JavaScript code that calls this method with crafted integer arguments.
See the 
CVE page on Mitre.org
for more details.
