999999.9 //union//all //select //cast(0x393133353134353632312e39...)
Select char_length(cast('123456789 1' as varchar(10))) from rdb$database. Получаем: Exception ... string truncation Т.е. пробел мы обрезать можем, а другие символы нет. Так и должно быть или нет?
999999.9 /**/union/**/all /**/select /**/cast...
select cast (2000 as type of quint) from rdb$database select cast (2000 as int) from rdb$database. If TYPE OF is used with a (VAR)CHAR type, its character.
999999.9' /**/union/**/all /**/select /**/cast...
select cast (2000 as type of quint) from rdb$database select cast (2000 as int) from rdb$database.
999999.9 /**/union/**/all /**/select /**/cast...
... as int) from rdb$database. If TYPE OF is used with a (VAR)CHAR type, its character. ...
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Yes, that's a classic SQL injection attack. Your only real long term defence is to secure the application, though you can ban IPs as required and there are various tools out there which will attempt to automate this. Ultimately, unless it becomes a DOS attack...
security - Sql injection can someone explain this code... - Stack Overflow
So, as it's being used a lot, I would submit my answer. In my opinion, the aim of these requests is to check the presence or absence of a sql injection.
How to handle 404 errors that look like SQL errors or hacking attempts?
As of a couple of weeks ago, I keep seeing a LOT of 404s that don't even look like links
999999.9 union all select 0x31303235343830303536...
Анализ поисковых запросов, новостных интересов и ожиданий пользователей сайта «Новости Мира» в соответствии с обращениями к внутренней поисковой системе «Новости мира»: Поисковый запрос «999999 9 union all select 0x31303235343830303536...