Book Image

Kali Linux - An Ethical Hacker's Cookbook

By : Himanshu Sharma
Book Image

Kali Linux - An Ethical Hacker's Cookbook

By: Himanshu Sharma

Overview of this book

With the current rate of hacking, it is very important to pentest your environment in order to ensure advanced-level security. This book is packed with practical recipes that will quickly get you started with Kali Linux (version 2016.2) according to your needs, and move on to core functionalities. This book will start with the installation and configuration of Kali Linux so that you can perform your tests. You will learn how to plan attack strategies and perform web application exploitation using tools such as Burp, and Jexboss. You will also learn how to perform network exploitation using Metasploit, Sparta, and Wireshark. Next, you will perform wireless and password attacks using tools such as Patator, John the Ripper, and airoscript-ng. Lastly, you will learn how to create an optimum quality pentest report! By the end of this book, you will know how to conduct advanced penetration testing thanks to the book’s crisp and task-oriented recipes.
Table of Contents (20 chapters)
Title Page
Credits
Disclaimer
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
6
Wireless Attacks – Getting Past Aircrack-ng

SEH bypass


Before we start, we need to understand what SEH is. SEH stands for structured exception handling. We may have often seen programs popping up an error saying the software has encountered a problem and needs to close. This basically means it's the default exception handler of Windows kicking in.

SEH handlers can be considered the block of try and catch statements that are executed in order when there's an exception in the program. This is what a typical SEH chain would look like:

Source: https://www.corelan.be/wp-content/uploads/2009/07/image_thumb45.png

When an exception occurs, the SEH chain comes to the rescue and handles the exception based on its type.

So, when an illegal instruction occurs, the application gets a chance to handle the exception. If no exception handler is defined in the application, we will see an error shown by Windows: something like Send a report to Microsoft.

To perform a successful exploitation of a program with the SEH handler, we first try to fill the stack...