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Bug Bounty Hunting Essentials

You're reading from   Bug Bounty Hunting Essentials Quick-paced guide to help white-hat hackers get through bug bounty programs

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Product type Paperback
Published in Nov 2018
Publisher
ISBN-13 9781788626897
Length 270 pages
Edition 1st Edition
Tools
Concepts
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Authors (2):
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Shahmeer Amir Shahmeer Amir
Author Profile Icon Shahmeer Amir
Shahmeer Amir
Carlos A. Lozano Carlos A. Lozano
Author Profile Icon Carlos A. Lozano
Carlos A. Lozano
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Table of Contents (15) Chapters Close

Preface 1. Basics of Bug Bounty Hunting 2. How to Write a Bug Bounty Report FREE CHAPTER 3. SQL Injection Vulnerabilities 4. Cross-Site Request Forgery 5. Application Logic Vulnerabilities 6. Cross-Site Scripting Attacks 7. SQL Injection 8. Open Redirect Vulnerabilities 9. Sub-Domain Takeovers 10. XML External Entity Vulnerability 11. Template Injection 12. Top Bug Bounty Hunting Tools 13. Top Learning Resources 14. Other Books You May Enjoy

XSS – CSRF's best friend

If we found that the application we are testing uses an anti-CSRF protection and is well-implemented, it is not the end. Maybe it is possible to defeat the anti-CSRF protection if we can use an XSS technique.

Let's do a little research about XSS attacks. The XSS attack sends a URL or POST request with the malicious payload to the user. So, if an application is vulnerable to CSRF but it has an anti-CSRF protection, when the application receives the XSS attacks, it will have the token or hash included as protection. So, the purpose is not injecting the code, but getting the token to use it in other requests.

This is the basic idea, but XSS could be exploited to bypass other types of protections. Here's a summary of how you can do it:

  • A stored XSS could read all the tokens in an application. Why? Because a stored XSS is launched...
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