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Kali Linux: Wireless Penetration Testing Beginner's Guide, Second Edition

You're reading from   Kali Linux: Wireless Penetration Testing Beginner's Guide, Second Edition Master wireless testing techniques to survey and attack wireless networks with Kali Linux

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Product type Paperback
Published in Mar 2015
Publisher Packt
ISBN-13 9781783280414
Length 214 pages
Edition 2nd Edition
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Authors (2):
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Vivek Ramachandran Vivek Ramachandran
Author Profile Icon Vivek Ramachandran
Vivek Ramachandran
Cameron Buchanan Cameron Buchanan
Author Profile Icon Cameron Buchanan
Cameron Buchanan
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Toc

Table of Contents (13) Chapters Close

Preface 1. Wireless Lab Setup FREE CHAPTER 2. WLAN and its Inherent Insecurities 3. Bypassing WLAN Authentication 4. WLAN Encryption Flaws 5. Attacks on the WLAN Infrastructure 6. Attacking the Client 7. Advanced WLAN Attacks 8. Attacking WPA-Enterprise and RADIUS 9. WLAN Penetration Testing Methodology 10. WPS and Probes A. Pop Quiz Answers Index

WEP encryption

The WEP protocol was known to be flawed as early as 2000 but, surprisingly, it is still continuing to be used and access points still ship with WEP enabled capabilities.

There are many cryptographic weaknesses in WEP and they were discovered by Walker, Arbaugh, Fluhrer, Martin, Shamir, KoreK, and many others. Evaluation of WEP from a cryptographic standpoint is beyond the scope of this book, as it involves understanding complex math. In this section, we will take a look at how to break WEP encryption using readily available tools on the BackTrack platform. This includes the entire aircrack-ng suite of tools—airmon-ng, aireplay-ng, airodump-ng, aircrack-ng, and others.

The fundamental weakness in WEP is its use of RC4 and a short IV value that is recycled every 224 frames. While this is a large number in itself, there is a 50 percent chance of four reuses every 5,000 packets. To use this to our advantage, we generate a large amount of traffic so that we can increase the...

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