Friday, June 13, 2014

Exploit NULL pointer dereference bug (ARM and x86)

A NULL pointer dereference occurs when a pointer with the value of 0 (NULL) is assumed to be a valid memory location, and that pointer is then accessed. A write from, or read to, the memory address 0x0 (+ small-offset) will generally reference invalid or unused memory, which typically leads to the majority of published denial-of-service (DoS) attacks both locally and remotely.