Select user from er where user = вЂuserвЂ™ OR It becomes possible to exploit the vulnerability with the method ofД«lind-SQL Injection by replacing SQL functions that get to WAFД«enchmark() -> sleep() Wide variety of logical requests.ДЄn example of various request notations with the same meaning. Of the equality one вЂ“ It is amazing, but many WAFs miss it! Negation and inequality signs (!=,, ) can be used instead The following requests allow one to conduct a successful attack for.These requests may be successfully performed using HPF.The SQL request becomes select key from table where.This request is successfully performed using the HPP technique.SQL='В selectВ keyВ fromВ tableВ whereВ id=В '+Request.QueryString('id') Successful conduction of an HPP attack bypassing WAF depends on theД®nvironment of the application being attacked. This request will be successfully performed using HPP.(replacement of a regular expression with the empty string). The given example works in case of excessive cleaning of incoming data Instead of construction /**/, any symbol sequence that WAF cuts off Similarly, the following request doesnвЂ™t allow anyone to conduct an.The given example works in case of cleaning of dangerous traffic, not inД¬ase of blocking the entire request or the attack source.Д®xample Number (2) of a vulnerability in the function of request After being processed by WAF, the request will become.WillВ beВ successfullyВ performed /?id=1/*union*/union/*select*/select+1,2,3/*

If there is a corresponding vulnerability in the WAF, this request.The following request doesnвЂ™t allow anyone to conduct an attack.Example: (MySQL): SELECT * from table where id = 1 union select 1,2,3Д®xample: (PostgreSQL): SELECT * from table where id = 1 select 1,2,3Д«ypassing WAF: SQL Injection - Normalization MethodД®xample Number (1) of a vulnerability in the function of request

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