FILES:
* nginx-nonpie: precompiled non-PIE version of nginx 1.4

* nginx-pie: precompiled PIE version of nginx. We manually 
assembled a "pop rdx; ret" gadget into a code cave because 
the strcmp method to set rdx did not work with our libc.

RUNNING THE EXPLOIT:
1) unpack the tarball
2) build and install nginx
3) if you want to test the exploit on a PIE binary, use our 
precompiled version
4) start nginx:
$/usr/local/nginx/sbin/nginx
5) run braille.rb to attack the non-PIE binary or pie.rb to
attack the PIE binary

