Hacking Wireless Networks For Dummies

Hacking

Wireless Networks

FOR

DUMmIES‰

by Kevin Beaver and Peter T. Davis

Foreword by Devin K. Akin

Chief Technology Officer,

The Certified Wireless Network Professional (CWNP) Program

Hacking

Wireless Networks

FOR

DUMmIES‰

by Kevin Beaver and Peter T. Davis

Foreword by Devin K. Akin

Chief Technology Officer,

The Certified Wireless Network Professional (CWNP) Program

Hacking Wireless Networks For Dummies®

Published by

Wiley Publishing, Inc.

111 River Street Hoboken, NJ 07030-5774

www.wiley.com

Copyright © 2005 by Wiley Publishing, Inc., Indianapolis, Indiana

Published by Wiley Publishing, Inc., Indianapolis, Indiana

Published simultaneously in Canada

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Library of Congress Control Number: 2005924619

ISBN-13: 978-0-7645-9730-5

ISBN-10: 0-7645-9730-2

Manufactured in the United States of America

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About the Authors

Kevin Beaver is founder and information security advisor with Principle Logic, LLC, an Atlanta-based information-security services firm. He has over 17 years of experience in the IT industry and specializes in information security assessments for those who take security seriously — and incident response for those who don’t. Before starting his own information-security services business, Kevin served in various information-technology and security roles for several healthcare, e-commerce, financial, and educational institutions.

Kevin is author of Hacking For Dummies as well as the e-book The Definitive Guide to Email Management and Security (Realtimepublishers.com). In addition, Kevin co-authored The Practical Guide to HIPAA Privacy and Security Compliance (Auerbach Publications). He was also a contributing author and editor of Healthcare Information Systems, 2nd ed., (Auerbach Publications), and technical editor of Network Security For Dummies.

Kevin is a regular columnist and information-security expert for SearchSecurity. com, SearchWindowsSecurity.com, SearchNetworking.com, SearchExchange. com, and SearchSmallBizIT.com. He also serves as a contributing editor

for HCPro’s Briefings on HIPAA newsletter and is a Security Clinic Expert for ITsecurity.com. In addition, Kevin’s information-security work has been published in Information Security Magazine, SecurityFocus.com, and Computerworld.com. Kevin is an information-security instructor for the Southeast Cybercrime Institute, and frequently speaks on information

security at various conferences for CSI, TechTarget, IIA, SecureWorld Expo, and the Cybercrime Summit.

Kevin earned his bachelor’s degree in Computer Engineering Technology from Southern Polytechnic State University and his master’s degree in Management of Technology from Georgia Tech. He also holds MCSE, Master CNE, and IT Project+ certifications. Kevin can be reached at [e-mail].

Peter T. Davis (CISA, CMA, CISSP, CWNA, CCNA, CMC, CISM) founded Peter Davis+Associates (a very original name) as a firm specializing in the security, audit, and control of information. A 30-year information-systems veteran,

Mr. Davis’s career includes positions as programmer, systems analyst, security administrator, security planner, information-systems auditor, and consultant. Peter is also the founder (and past President) of the Toronto ISSA chapter, past Recording Secretary of the ISSA’s International Board, and past Computer Security Institute Advisory Committee member. Mr. Davis has written or co-written numerous articles and 10 books, including Wireless Networks For Dummies and Securing and Controlling Cisco Routers. In addition, Peter was

the technical editor for Hacking For Dummies and Norton Internet Security For Dummies. Peter is listed in the International Who’s Who of Professionals. In addition, he was only the third editor in the three-decade history of EDPACS, a publication in the field of security, audit, and control. He finds time to be a part-time lecturer in data communications at Seneca College (http://cs.senecac.on.ca). He lives with his wife Janet, daughter Kelly, two cats, and a dog in Toronto, Ontario.

Dedication

Little G — this one’s for you. You’re such a great motivator and inspiration to me — more than words can say. Thanks for reminding me of what’s really important. Thanks for being you.

—Kevin

To all my friends and enemies. Hopefully, the first group is bigger than the second.

—Peter

Authors’ Acknowledgments

Kevin:

Thanks to Melody Layne, our acquisitions editor, for approaching me about this project and getting the ball rolling.

I’d like to thank our project editor, Chris Morris, as well as Kevin Kirschner and all the behind-the-scenes copy editors for pulling this thing together. Many thanks to my co-author Peter T. Davis for working with me on this book. It has been an honor and a pleasure.

I’d also like to thank Hugh Pepper, our technical editor, for the feedback and insight he gave us during the technical editing process.

Also, many thanks to Devin Akin with Planet3 Wireless for writing the foreword. Major kudos too for all the positive things you’ve done for the industry with the CWNP program. You’re a true wireless network pioneer.

Many thanks to Ronnie Holland with WildPackets, Chia Chee Kuan with AirMagnet, Michael Berg with TamoSoft, Matt Foster with BLADE Software, Ashish Mistry with AirDefense, and Wayne Burkan with Interlink Networks for helping out with my requests.

Thanks, appreciation, and lots of love to Mom and Dad for all the values and common sense you instilled in me long ago. I wouldn’t be where I’m at today without it.

Finally, to my dear wife Amy for all her support during this book. Yet another one I couldn’t have done without you! You’re the best.

Peter:

Melody Layne (our acquisitions editor) for pitching the book to the editorial committee and getting us a contract. As always, much appreciated.

Chris Morris for helping us bring this project to fruition. Kudos, Chris.

Hugh Pepper, tech editor, for his diligence in reviewing the material. Thanks, Hugh, for stepping in and stepping up.

Peter would like to thank Kevin Beaver for suggesting we write this together. Thanks Kevin. Peter would also like to thank Ken Cutler, Gerry Grindler, Ronnie Holland, Carl Jackson, Ray Kaplan, Kevin Kobelsky, Carrie Liddie, Dexter Mills Jr. and Larry Simon for responding to a request for wireless information. Thanks for answering the call for help. And a really big shout-out to John Selmys and Danny Roy for their efforts. Thanks, guys. The provided information shows in this book. Peter would be remiss should he not thank the NHL and NHLPA for canceling the hockey season. Thanks for freeing up his time to write this book. But the book is done, so get it together so he has something to watch this fall! (Come on guys, the Raptors don’t quite fill the void.) A special thanks to Janet and Kelly for allowing Peter to work on the book as they painted the family room. Now he can kick back and enjoy the room!

Publisher’s Acknowledgments

We’re proud of this book; please send us your comments through our online registration form located at www.dummies.com/register/.

Some of the people who helped bring this book to market include the following:

	Acquisitions, Editorial,	Composition Services
	and Media Development	Project Coordinator: Adrienne Martinez
	Project Editor: Christopher Morris
		Layout and Graphics: Carl Byers, Andrea Dahl,
	Acquisitions Editor: Melody Layne
		Mary Gillot Virgin
	Copy Editors: Barry Childs-Helton,	Proofreaders: Jessica Kramer, Joe Niesen,
	Andy Hollandbeck, Beth Taylor	Carl William Pierce, Dwight Ramsey,
	Technical Editor: Hugh Pepper	TECHBOOKS Production Services
		Indexer: TECHBOOKS Production Services
	Editorial Manager: Kevin Kirschner
	Editorial Assistant: Amanda Foxworth
	Cartoons: Rich Tennant (www.the5thwave.com)

Publishing and Editorial for Technology Dummies

Richard Swadley, Vice President and Executive Group Publisher

Andy Cummings, Vice President and Publisher

Mary Bednarek, Executive Acquisitions Director

Mary C. Corder, Editorial Director

Publishing for Consumer Dummies

Diane Graves Steele, Vice President and Publisher

Joyce Pepple, Acquisitions Director

Composition Services

Gerry Fahey, Vice President of Production Services

Debbie Stailey, Director of Composition Services

Contents at a Glance
Foreword ..................................................................	xvii
Introduction ................................................................	1
Part I: Building the Foundation
for Testing Wireless Networks .......................................	7
Chapter 1: Introduction to Wireless Hacking .................................................................	9
Chapter 2: The Wireless Hacking Process ....................................................................	19
Chapter 3: Implementing a Testing Methodology .......................................................	31
Chapter 4: Amassing Your War Chest ...........................................................................	43
Part II: Getting Rolling with Common Wi-Fi Hacks .......	65
Chapter 5: Human (In)Security ......................................................................................	67
Chapter 6: Containing the Airwaves .............................................................................	81
Chapter 7: Hacking Wireless Clients .............................................................................	97
Chapter 8: Discovering Default Settings .....................................................................	113
Chapter 9: Wardriving ...................................................................................................	131
Part III: Advanced Wi-Fi Hacks ................................	153
Chapter 10: Still at War .................................................................................................	155
Chapter 11: Unauthorized Wireless Devices ..............................................................	177
Chapter 12: Network Attacks .......................................................................................	195
Chapter 13: Denial-of-Service Attacks .........................................................................	225
Chapter 14: Cracking Encryption ................................................................................	255
Chapter 15: Authenticating Users ...............................................................................	281
Part IV: The Part of Tens ..........................................	301
Chapter 16: Ten Essential Tools for Hacking Wireless Networks ............................	303
Chapter 17: Ten Wireless Security-Testing Mistakes ................................................	307
Chapter 18: Ten Tips for Following Up after Your Testing .......................................	321
Part V: Appendixes ..................................................	325
Appendix A: Wireless Hacking Resources ..................................................................	327
Appendix B: Glossary of Acronyms ............................................................................	341

Index .......................................................................

347