The PDF distiller in the Attachment Service in Research in Motion (RIM) BlackBerry Enterprise Server (BES) 4.1.3 through 4.1.6, BlackBerry Professional Software 4.1.4, and BlackBerry Unite! before 1.0.3 bundle 28 performs delete operations on uninitialized pointers, which allows user-assisted remote attackers to execute arbitrary code via a crafted data stream in a .pdf file.