Multiple unspecified vulnerabilities in Adobe Reader 7 and Acrobat 7 before 7.1.3, Adobe Reader 8 and Acrobat 8 before 8.1.6, and Adobe Reader 9 and Acrobat 9 before 9.1.2 have unknown impact and attack vectors, related to "Adobe internally discovered issues."
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.
Heap-based buffer overflow in Adobe Acrobat Reader and Acrobat Professional 7.1.0, 8.1.3, 9.0.0, and other versions allows remote attackers to execute arbitrary code via a PDF file containing a JBIG2 stream with a size inconsistency related to an unspecified table.
Buffer overflow in Adobe Reader 9.0 and earlier, and Acrobat 9.0 and earlier, allows remote attackers to execute arbitrary code via a crafted PDF document, related to a non-JavaScript function call and possibly an embedded JBIG2 image stream, as exploited in the wild in February 2009 by Trojan.Pidief.E.
Adobe Acrobat 9 uses more efficient encryption than previous versions, which makes it easier for attackers to guess a document's password via a brute-force attack.