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Mastering Metasploit

You're reading from   Mastering Metasploit Exploit systems, cover your tracks, and bypass security controls with the Metasploit 5.0 framework

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Product type Paperback
Published in Jun 2020
Publisher Packt
ISBN-13 9781838980078
Length 502 pages
Edition 4th Edition
Languages
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Author (1):
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Nipun Jaswal Nipun Jaswal
Author Profile Icon Nipun Jaswal
Nipun Jaswal
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Table of Contents (17) Chapters Close

Preface 1. Section 1 – Preparation and Development
2. Chapter 1: Approaching a Penetration Test Using Metasploit FREE CHAPTER 3. Chapter 2: Reinventing Metasploit 4. Chapter 3: The Exploit Formulation Process 5. Chapter 4: Porting Exploits 6. Section 2 – The Attack Phase
7. Chapter 5: Testing Services with Metasploit 8. Chapter 6: Virtual Test Grounds and Staging 9. Chapter 7: Client-Side Exploitation 10. Section 3 – Post-Exploitation and Evasion
11. Chapter 8: Metasploit Extended 12. Chapter 9: Evasion with Metasploit 13. Chapter 10: Metasploit for Secret Agents 14. Chapter 11: Visualizing Metasploit 15. Chapter 12: Tips and Tricks 16. Other Books You May Enjoy

Exploiting SEH-based buffer overflows with Metasploit

Exception handlers are code modules that catch exceptions and errors generated during the execution of the program. This allows the program to continue execution instead of crashing. Windows OSes have default exception handlers, and we see them generally when an application crashes and throws a popup that says such and such a program encountered an error and needed to close. When the program generates a specific exception, the equivalent address of the catch code is loaded and called from the stack. However, if we somehow manage to overwrite the address in the stack for the catch code of the handler, we will be able to control the application. Let's see how things are arranged in a stack when an application is implemented with exception handlers:

Figure 3.24 – Address of the catch block in the stack

In the preceding diagram, we can see that we have the address of the catch block in the stack...

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