The story that I remember is that on *nix the exploit had you trying to access an address over 2 GB. On 32-bit platforms that is an illegal thing to do, core dump you bad boy. On 64-bit platforms that is legal, but unless you are using 64-bit pointers and your Apache kid is addressing more than 2 GB, that will be an illegal address again. In that miniscule remaining case, execute something, which (unless someone can come up with something I didn't hear about) you have no control over, which therefore is likely to segfault almost immediately anyways.

Cheers,
Ben