The TCP implementation in the kernel in Apple iOS before 8.3, Apple OS X before 10.10.3, and Apple TV before 7.2 does not properly implement the Urgent (aka out-of-band data) mechanism, which allows remote attackers to cause a denial of service via crafted packets.
Improper Input Validation The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly.