Editing Buffer overflow (section)

===Address space layout randomization===
{{Main|Address space layout randomization}}

Address space layout randomization (ASLR) is a computer security feature that involves arranging the positions of key data areas, usually including the base of the executable and position of libraries, heap, and stack, randomly in a process' address space.

Randomization of the [[virtual memory]] addresses at which functions and variables can be found can make exploitation of a buffer overflow more difficult, but not impossible. It also forces the attacker to tailor the exploitation attempt to the individual system, which foils the attempts of [[internet worm]]s.<ref>{{cite web |title=PaX at GRSecurity.net |url=http://pax.grsecurity.net/docs/aslr.txt |access-date=2007-06-03}}</ref> A similar but less effective method is to [[rebasing|rebase]] processes and libraries in the virtual address space.