Vector Rewrite Attacks
Barnaby Jack, a security researcher at Juniper Networks has released a paper which is about exploitable NULL Pointer vulnerabilities on ARM and XScale architectures.
NULL pointer dereference flaws typically account for the majority of published denial-of -service attacks, both locally and remotely. A NULL pointer dereference occurs when a pointer with the value of 0 is assumed to be a valid memory location, and that pointer is then accessed. A NULL pointer dereference is rarely more than an annoyance, with the worst case scenario typically resulting in a software crash. A write from, or read to, the memory address 0×0 will generally reference invalid or unused memory.
You can read the white paper here:
Exploitable NULL Pointer Vulnerabilities on ARM and XScale Architectures
