Thx, i hope it works and if it work, i will report it.

[edit]
This Exploit is strange, on any "exploited" box the port is bound with nothing.
I just get this:
nc -v ***.**.***.*** 31337
host.***.*** [***.**.***.***] 31337 (?) open
Or
***.**.**.**: inverse host lookup failed: h_errno 11004: NO_DATA
(UNKNOWN) [***.**.**.**] 31337 (?) open
Sorry for my broken english.