[CentOS] C5 MySQL injection attack ("Union Select")

[Always Learning]

On Thu, 2016-03-24 at 14:27 +0300, Александр Кириллов wrote:

> This is obviously an application level problem. What is this php file?
> You should upgrade wordpress and remove or block access to the plugin or 
> custom page which allows sql injections.

Yes, my mistake. I should have imposed strict controls on the length of
parameters passed to programmes via web pages $_GET[] such as:-

 UNION SELECT
CHAR(45,120,49,45,81,45),CHAR(45,120,50,45,81,45),CHAR(45,120,51,45,81,45),CHAR(45,120,52,45,81,45),CHAR(45,120,53,45,81,45),CHAR(45,120,54,45,81,45),CHAR(45,120,55,45,81,45),CHAR(45,120,56,45,81,45),CHAR(45,120,57,45,81,45),CHAR(45,120,49,48,45,81,45),CHAR(45,120,49,49,45,81,45),CHAR(45,120,49,50,45,81,45),CHAR(45,120,49,51,45,81,45),CHAR(45,120,49,52,45,81,45),CHAR(45,120,49,53,45,81,45),CHAR(45,120,49,54,45,81,45),CHAR(45,120,49,55,45,81,45),CHAR(45,120,49,56,45,81,45),CHAR(45,120,49,57,45,81,45),CHAR(45,120,50,48,45,81,45),CHAR(45,120,50,49,45,81,45),CHAR(45,120,50,50,45,81,45),CHAR(45,120,50,51,45,81,45) --  /*

and reject any incoming string containing ' or " in addition to PHP's
strip_tags and (deprecated in later versions)
mysql_real_escape_string($_GET['....'],$link);

I do not use Wordpress or anything like it.



-- 
Regards,

Paul.
England, EU.      England's place is in the European Union.