Book Image

The Web Application Hacker's Handbook

By : Dafydd Stuttard, Marcus Pinto
Book Image

The Web Application Hacker's Handbook

By: Dafydd Stuttard, Marcus Pinto

Overview of this book

Web applications are the front door to most organizations, exposing them to attacks that may disclose personal information, execute fraudulent transactions, or compromise ordinary users. This practical book has been completely updated and revised to discuss the latest step-by-step techniques for attacking and defending the range of ever-evolving web applications. Youíll explore the various new technologies employed in web applications that have appeared since the first edition and review the new attack techniques that have been developed, particularly in relation to the client side. The book starts with the current state of web application security and the trends that indicate how it is likely to evolve soon. Youíll examine the core security problem affecting web applications and the defence mechanisms that applications implement to address this problem, and youíll also explore the key technologies used in todayís web application. Next, youíll carry out tasks for breaking into web applications and for executing a comprehensive attack. As you progress, youíll learn to find vulnerabilities in an application's source code and review the tools that can help when you hack web applications. Youíll also study a detailed methodology for performing a comprehensive and deep attack against a specific target. By the end of this book, youíll be able to discover security flaws in web applications and how to deal with them.
Table of Contents (32 chapters)
Free Chapter
1
Cover
2
Title
3
Copyright
4
About the Authors
5
About the Technical Editor
6
MDSec: The Authors’ Company
7
Credits
8
Acknowledgments
31
Index
32
End User License Agreement

Database Code Components

Web applications increasingly use databases for much more than passive data storage. Today's databases contain rich programming interfaces, enabling substantial business logic to be implemented within the database tier itself. Developers frequently use database code components such as stored procedures, triggers, and user-defined functions to carry out key tasks. Therefore, when you review the source code to a web application, you should ensure that all logic implemented in the database is included in the scope of the review.

Programming errors in database code components can potentially result in any of the various security defects described in this chapter. In practice, however, you should watch for two main areas of vulnerabilities. First, database components may themselves contain SQL injection flaws. Second, user input may be passed to potentially dangerous functions in unsafe ways.

SQL Injection

Chapter 9 described how prepared statements can be used...