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Kali Linux Web Penetration Testing Cookbook

You're reading from   Kali Linux Web Penetration Testing Cookbook Over 80 recipes on how to identify, exploit, and test web application security with Kali Linux 2

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Product type Paperback
Published in Feb 2016
Publisher
ISBN-13 9781784392918
Length 296 pages
Edition 1st Edition
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Author (1):
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Gilberto Najera-Gutierrez Gilberto Najera-Gutierrez
Author Profile Icon Gilberto Najera-Gutierrez
Gilberto Najera-Gutierrez
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Toc

Table of Contents (12) Chapters Close

Preface 1. Setting Up Kali Linux FREE CHAPTER 2. Reconnaissance 3. Crawlers and Spiders 4. Finding Vulnerabilities 5. Automated Scanners 6. Exploitation – Low Hanging Fruits 7. Advanced Exploitation 8. Man in the Middle Attacks 9. Client-Side Attacks and Social Engineering 10. Mitigation of OWASP Top 10 Index

Identifying cross-site scripting (XSS) vulnerabilities


Cross-site scripting (XSS) is one of the most common vulnerabilities in web applications, in fact, it is considered third in the OWASP Top 10 from 2013 (https://www.owasp.org/index.php/Top_10_2013-Top_10).

In this recipe, we will see some key points to identify a cross-site scripting vulnerability in a web application.

How to do it...

  1. Log into DVWA and go to XSS reflected.

  2. The first step in testing for vulnerability is to observe the normal response of the application. Introduce a name in the text box and click on Submit. We will use Bob.

  3. The application used the name we provided to form a phrase. What happens if instead of a valid name we introduce some special characters or numbers? Let's try with <'this is the 1st test'>.

  4. Now we can see that anything we put in the text box will be reflected in the response, that is, it becomes a part of the HTML page in response. Let's check the page's source code to analyze how it presents the information...

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