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Kali Linux Wireless Penetration Testing Beginner???s Guide - Third Edition

You're reading from  Kali Linux Wireless Penetration Testing Beginner???s Guide - Third Edition

Product type Book
Published in Dec 2017
Publisher
ISBN-13 9781788831925
Pages 210 pages
Edition 3rd Edition
Languages
Authors (3):
Cameron Buchanan Cameron Buchanan
Profile icon Cameron Buchanan
Daniel W. Dieterle Daniel W. Dieterle
Profile icon Daniel W. Dieterle
Vivek Ramachandran Vivek Ramachandran
Profile icon Vivek Ramachandran
View More author details
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Table of Contents (21) Chapters close

Kali Linux Wireless Penetration Testing Beginner's Guide Third Edition
Credits
Disclaimer
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
1. Wireless Lab Setup 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. KRACK Attacks 9. Attacking WPA-Enterprise and RADIUS 10. WLAN Penetration Testing Methodology 11. WPS and Probes Pop Quiz Answers Index

KRACK attack overview


KRACK stands for Key Reinstallation AttaCKs. It's a tranche of vulnerabilities publicly disclosed in October 2017 by a team from KU Leuven. The attack is the exploitation of a fundamental flaw in the WPA2 handshake, allowing resending of a stage of the handshake in order to overwrite cryptographic data. This chapter will cover the attack at a theoretical level and provide some guidance on the successful identification and exploitation of this vulnerability.

Let's look at the WPA2 handshake, the standard for which can be found in the IEEE 802.11 standards, accessible here: http://ieeexplore.ieee.org/document/7792308/. For this explanation we are starting post-association and authentication stage as the vulnerability is not affected by those.

The Pairwise Transient Key (PTK) used for encryption is made up of five attributes:

  • A shared secret key known as the Pairwise Master Key (PMK)

  • A nonce value created by the access point (ANonce)

  • A nonce value created by the user station...

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