FreeBSD 9.{0,1} mmap/ptrace exploit

[eas7]

exploit: http://cxsecurity.com/issue/WLB-2013060170

/*
* FreeBSD 9.{0,1} mmap/ptrace exploit
* by Hunger
*
* Happy Birthday FreeBSD!
* Now you are 20 years old and your security is the same as 20 years ago... :)
*
* Greetings to #nohup, _2501, boldi, eax, johnny_b, kocka, op, pipacs, prof,
* sd, sghctoma, snq, spender, s2crew and others at #hekkcamp:
* I hope we'll meet again at 8 () 1470n ;)
*
* Special thanks to proactivesec.com
*

$ uname -a
FreeBSD fbsd91x64 9.1-RELEASE FreeBSD 9.1-RELEASE #0 r243825: Tue Dec
4 09:23:10 UTC 2012
root () farrell cse buffalo edu:/usr/obj/usr/src/sys/GENERIC amd64
$ id
uid=1001(hunger) gid=1002(hunger) groups=1002(hunger)
$ gcc fbsd9lul.c -o fbsd9lul
$ ./fbsd9lul
FreeBSD 9.{0,1} mmap/ptrace exploit
by Hunger
# id
uid=0(root) gid=0(wheel) egid=1002(hunger) groups=1002(hunger)
#
*/