Foxit Reader, Enterprise Reader, and PhantomPDF before 7.1 allow remote attackers to cause a denial of service (memory corruption and crash) via a crafted (1) Ubyte Size in a DataSubBlock structure or (2) LZWMinimumCodeSize in a GIF image.
http://www.securitytracker.com/id/1031877
http://www.securityfocus.com/bid/73430
http://www.foxitsoftware.com/support/security_bulletins.php#FRD-24
http://www.foxitsoftware.com/support/security_bulletins.php#FRD-23