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BackTrack 5 Wireless Penetration Testing Beginner's Guide

Chapter 2. WLAN and Its Inherent Insecurities

Note

"The loftier the building, the deeper the foundation must be laid."

Thomas Kempis, Writer

Nothing great can be built on a weak foundation, and in our context, nothing secure can be built on something which is inherently insecure.

WLANs by design have certain insecurities which are relatively easy to exploit, such as packet spoofing, packet injection, and sniffing (which could even happen from far away). We will explore those flaws in this chapter.

In this chapter, we will look at the following:

Revisiting WLAN frames
Different frame types and sub-types
Using Wireshark to sniff Management, Control, and Data frames
Sniffing data packets for a given wireless network
Injecting packets into a given wireless network

Let's get started!

Key benefits

Learn Wireless Penetration Testing with the most recent version of Backtrack

The first and only book that covers wireless testing with BackTrack

Concepts explained with step-by-step practical sessions and rich illustrations

Written by Vivek Ramachandran ¬¨‚Äì world renowned security research and evangelist, and discoverer of the wireless ‚ÄúCaffe Latte Attack‚Äù

Description

Wireless has become ubiquitous in today‚Äôs world. The mobility and flexibility provided by it makes our lives more comfortable and productive. But this comes at a cost ‚Äì Wireless technologies are inherently insecure and can be easily broken. BackTrack is a penetration testing and security auditing distribution that comes with a myriad of wireless networking tools used to simulate network attacks and detect security loopholes. Backtrack 5 Wireless Penetration Testing Beginner‚Äôs Guide will take you through the journey of becoming a Wireless hacker. You will learn various wireless testing methodologies taught using live examples, which you will implement throughout this book. The engaging practical sessions very gradually grow in complexity giving you enough time to ramp up before you get to advanced wireless attacks.This book will take you through the basic concepts in Wireless and creating a lab environment for your experiments to the business of different lab sessions in wireless security basics, slowly turn on the heat and move to more complicated scenarios, and finally end your journey by conducting bleeding edge wireless attacks in your lab.There are many interesting and new things that you will learn in this book ‚Äì War Driving, WLAN packet sniffing, Network Scanning, Circumventing hidden SSIDs and MAC filters, bypassing Shared Authentication, Cracking WEP and WPA/WPA2 encryption, Access Point MAC spoofing, Rogue Devices, Evil Twins, Denial of Service attacks, Viral SSIDs, Honeypot and Hotspot attacks, Caffe Latte WEP Attack, Man-in-the-Middle attacks, Evading Wireless Intrusion Prevention systems and a bunch of other cutting edge wireless attacks.If you were ever curious about what wireless security and hacking was all about, then this book will get you started by providing you with the knowledge and practical know-how to become a wireless hacker.

Who is this book for?

If you are an IT security professional or a security consultant who wants to get started with wireless testing with Backtrack, or just plain inquisitive about wireless security and hacking, then this book is for you. The book assumes that you have familiarity with Backtrack and basic wireless concepts.

What you will learn

Create a Wireless Lab for conducting experiments

Monitor the air and sniff wireless packets

Bypass WLAN authentication mechanism

Crack WEP/WPA/WPA2 encryption mechanisms

Break into a WLAN network using infrastructure flaws

Break into a Wireless client such as a laptop

Advanced attacks such as Man-in-the-Middle attacks and Evading WIPS

Conduct wireless penetration test in a methodical way

What do you get with Print?

Instant access to your digital eBook copy whilst your Print order is Shipped

Paperback book shipped to your preferred address

Download this book in EPUB and PDF formats

Access this title in our online reader with advanced features

DRM FREE - Read whenever, wherever and however you want

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BackTrack 5 Wireless Penetration Testing Beginner's Guide

₱2806.99

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Advanced Penetration Testing for Highly-Secured Environments: The Ultimate Security Guide

₱3367.99

Total ₱ 8,981.97

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Make War Oct 03, 2014

Excellent

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GK Feb 28, 2012

This book should be a template for how other tech books should be written; to the point and full of useful (real world) examples and exercises. Another great thing about this book (in my experience) was that it did not assume too much or too little knowledge on the subject from me. Just enough for beginners to start with and build throughout the book, and enough for anyone not an expert on the subject to learn from.Highly Recommended.

Seth Sep 26, 2011

An amazing book. This one wastes no time with a long pre-amble or justifying why you'd need to know how to pen-test; it just tells you what you need to know. You're sniffing wireless traffic right from the start, injecting packets by page 40 or so, and then you're off spoofing MAC addreses, cracking WPA (even shared authentication), and doing man-in-the-middle attacks.This is not a book that explains a lot of theory and then expects you to figure out how to apply it. It's a finely-tuned set of clear, intentional tutorials that explains how to use the tools, how to get results, and then explains what happened and why. It covers some of the basics (like ifconfig, iwconfig, ping, and a little bit about packet specifications), and then moves on to the heavy-lifters like airmon, aireplay, airodump, wireshark, and others.While all of these tools have tutorials and manuals online, the way they work together is seldomly explained, and even more rarely are they explained with the clarity and focus of this book. The situations the book covers are realistic wireless network setups that you'll find at businesses, cafes, and homes. There are screenshots on nearly everypage, so it doesn't just explain what to do - it actually shows you.If you're completely new to pen-testing, this book is where you should start. You should try to learn at least a little bit of Linux before delving into this (but you should be learning that anyway) but this book doesn't assume that you are a pro. It guides you through all of the basic essentials, such as setting up a pen-testing lab environment (configuring your access point, making sure your wireless card is open enough to be configured, and so on), and even how to install Backtrack Linux itself. You will need a good lab environment to use this book effectively, so make sure you have access to a router, two laptops with wireless cards (one to use and one to be the victim), and a usb wireless card to perform packet injection (the book recommends the Alfa AWUS036H).All in all, whether you're learning this stuff because you're angry at the world and want to mess up wireless networks or because you're a sys admin and need to protect your network from intruders, this is easily the best book on the subject I have found. Too many books on this topic assume that the reader is a "security professional" and uses jargon and lingo without explaining anything. This book sits down with you, gives you the information you need, and you get the results that you wanted. Considering that courses from Backtrack's website start at around $750, this book feels like a hack in itself.

Andrew Smith Feb 23, 2013

This book covers pretty much everything you would need to know in order to perform a professional wifi pentest. Wireless hacking is pretty easy to do relative to a number of other things you would do in the world of offensive security mainly due to the fact that you need not have any programming experience to pull it off.Much of it is simply a matter of memorizing the proper terminal commands and knowing when to use them, and this book covers this perfectly. Some of the things included in this book are:-How to install BackTrack 5 and set up a hack lab-General information on WLAN frames and the 802.11 protocol system-Some basic use of Wireshark to collect information on the network or area you are in (you'll know why https is important)-Cracking WEP, WPA, WPA2, and even getting past things like MAC filtering-Denial of service attacks (a complete jackass could really abuse this information if they are in a coffee shop)And so on. I won't go into too much detail except to say that this book can be used by anyone with no prior BackTrack experience so long as they are willing to set some time aside to try the things in this book. It truly gets right to the point about how to perform an attack first (so impatience is less of a problem) and then explaining why you ended up with the result that you got (if the attack was done correctly).For anyone interested in BackTrack, Wifi cracking, or hacking in general, this book is a must have!

Nickg Sep 30, 2011

BackTrack 5 Wireless Penetration Testing Beginner's Guide is the perfect book for beginners and novices to dive into the wireless security field. Vivek Ramachandran (the Author) is an amazing teacher with a vast amount of knowledge on technology, networking, security and wireless. Vivek speaks at multiple security conferences every year and also discovered one of the wireless vulnerabilities and attacks used in the book called the "Caffe Latte Attack".The book starts you off with a quick introduction to wireless and security, then steps you through setting up a home lab with links to what software and hardware you will need. Cost is not an issue, with free virtualization software (VMware & Sun); anyone can setup a quick home lab. Chances are you already have a wireless router and laptop, so the only cost is this book and an external usb wireless card ($40 if that!) After the setup, BOOM; you are on your way to testing and hacking in your own home lab. The book guides you through hands on exercises to insure what you learn sticks with you. Also, every chapter has a review and questions to test what you have learned.Before I knew it, I was halfway through the book, not wanting to put it down. The tools you will learn are airmon-ng, aireplay-ng, airodump-ng, aircrack-ng and wireshark to name a few. You will use these tools to capture wireless packets, crack wep, wpa/wpa2 and also learn some linux command line.Wireless security is not a part of my job function, but learning about security and wireless is a hobby of mine. I am very glad to have found this book and after purchasing the ebook version, I may go back and purchase a hard copy to leave on my desk. :)If you have not visited securitytube.net (founded by Vivek), please do and purchase this book! BackTrack 5 Wireless Penetration Testing Beginner's Guide

BackTrack 5 Wireless Penetration Testing Beginner's Guide: Master bleeding edge wireless testing techniques with BackTrack 5.

What do you get with Print?

BackTrack 5 Wireless Penetration Testing Beginner's Guide

Chapter 2. WLAN and Its Inherent Insecurities

Note

Revisiting WLAN frames

Time for action – creating a monitor mode interface

Time for action – sniffing wireless packets

Time for action – viewing Management, Control, and Data frames

Time for action – sniffing data packets for our network

Time for action – packet injection

What just happened?

Have a go hero –...

Important note on WLAN sniffing and injection

Time for action – expermenting with your Alfa card

What just happened?

Role of regulatory domains in wireless

Time for acton – experimenting with your Alfa card

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