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Thursday, January 30, 2014

Manually Web Application Penetration Testing: Fuzzing - Part 4

When we test a web application, we do not test a single page, but a lot of pages of a single web application. Each page may have more than one variable, so technically you will be engaging with a ton of variables during your web application test. So when you inject anything into the input, it is good to know what kind of effect your injection has on the server. In this part of this series of articles, we will look at the importance of simple alphabetic injection along with the web page encoding technology and how it affects our testing and result.

Simple Alphabetic Injection
When you engage with many web pages and a ton of variables, it is good to find your input after you inject. When you give something to the web page as an input, your input will not be used in only one place, but it will be used for many variables and tons of places. One of the common ways to check which areas use a given input is to give a simple alphabetic injection. This simple alphabetic injection can be anything. As I said in an earlier article, I personally use Jonnybravo as a username and momma as a password. If I use any special characters within my input, it might get encoded/eliminated to prevent the injection attacks on that page. What encoding is and how it takes place I will cover later on. The reason for using simple alphabetic injection is because it will never be encoded or eliminated by the server and you can easily find your input within the response as well as the request.

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