Book Image

Kali Linux Web Penetration Testing Cookbook

By : Gilberto Najera-Gutierrez
Book Image

Kali Linux Web Penetration Testing Cookbook

By: Gilberto Najera-Gutierrez

Overview of this book

Web applications are a huge point of attack for malicious hackers and a critical area for security professionals and penetration testers to lock down and secure. Kali Linux is a Linux-based penetration testing platform and operating system that provides a huge array of testing tools, many of which can be used specifically to execute web penetration testing. This book will teach you, in the form step-by-step recipes, how to detect a wide array of vulnerabilities, exploit them to analyze their consequences, and ultimately buffer attackable surfaces so applications are more secure, for you and your users. Starting from the setup of a testing laboratory, this book will give you the skills you need to cover every stage of a penetration test: from gathering information about the system and the application to identifying vulnerabilities through manual testing and the use of vulnerability scanners to both basic and advanced exploitation techniques that may lead to a full system compromise. Finally, we will put this into the context of OWASP and the top 10 web application vulnerabilities you are most likely to encounter, equipping you with the ability to combat them effectively. By the end of the book, you will have the required skills to identify, exploit, and prevent web application vulnerabilities.
Table of Contents (17 chapters)
Kali Linux Web Penetration Testing Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Identifying POODLE vulnerability


As mentioned in our previous recipe, Obtaining HTTPS parameters with SSLScan, it is possible, in some conditions, for a man-in-the-middle attacker to downgrade the secure protocol and cipher suites used in an encrypted communication.

A Padding Oracle On Downgraded Legacy Encryption (POODLE) attack uses this condition to downgrade a TLS communication to SSLv3 and forces the use of cipher suites (CBC) that can be easily broken and then the communication decrypted.

In this recipe, we will use an Nmap script to detect the existence of such a vulnerability on our test server.

Getting ready

We will have to install Nmap and download the script made specially to detect this vulnerability:

  1. Go to http://nmap.org/nsedoc/scripts/ssl-poodle.html.

  2. Download the ssl-poodle.nse file.

  3. Let's say, it was downloaded to /root/Downloads in your Kali Linux installation. Now open a terminal and copy it to the Nmap's scripts directory:

    cp /root/Downloads/ssl-poodle.nse /usr/share/nmap/scripts...