The BlackBerry Attachment Service in Research in Motion (RIM) BlackBerry Enterprise Server (BES) 4.0 to version 4.0 Service Pack 2 allows attackers to cause a denial of service via a malformed Portable Network Graphics (PNG) file that triggers a heap-based buffer overflow.
Improper Restriction of Operations within the Bounds of a Memory Buffer The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary.