Multiple buffer overflows in iCloud Keychain in Apple iOS before 8.2 and Apple OS X through 10.10.2 allow man-in-the-middle attackers to execute arbitrary code by modifying the client-server data stream during keychain recovery.
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.