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Learning Penetration Testing with Python

You're reading from   Learning Penetration Testing with Python Utilize Python scripting to execute effective and efficient penetration tests

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Product type Paperback
Published in Sep 2015
Publisher
ISBN-13 9781785282324
Length 314 pages
Edition 1st Edition
Languages
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Author (1):
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Christopher Duffy Christopher Duffy
Author Profile Icon Christopher Duffy
Christopher Duffy
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Table of Contents (12) Chapters Close

Preface 1. Understanding the Penetration Testing Methodology FREE CHAPTER 2. The Basics of Python Scripting 3. Identifying Targets with Nmap, Scapy, and Python 4. Executing Credential Attacks with Python 5. Exploiting Services with Python 6. Assessing Web Applications with Python 7. Cracking the Perimeter with Python 8. Exploit Development with Python, Metasploit, and Immunity 9. Automating Reports and Tasks with Python 10. Adding Permanency to Python Tools Index

The Scapy library for Python


Welcome to Scapy, the Python library that is designed to manipulate, send, and read packets. Scapy is one of those tools that have a large amount of applicability, but it can seem complex to use. Before we set off, there are some basic rules to understand about Scapy that will make creating scripts much easier.

Firstly, refer to the previous sections to understand the TCP flags and how they are represented in Scapy. You will need to look at the flags mentioned earlier and their relevant positions to use them. Secondly, when Scapy receives responses for a packet sent, the flags are represented by binary bits in octal format within the 13th octet of a TCP header. So, you have to read the response based on this information.

Look at the following table, which represents the binary positional values of each flag as it is set:

So when you are reading the responses from the TCP packets and looking for a specific type of flag, you have to do the math. The preceding table...

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