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

Securing Access Controls

Access controls are one of the easiest areas of web application security to understand, although you must carefully apply a well-informed, thorough methodology when implementing them.

First, you should avoid several obvious pitfalls. These usually arise from ignorance about the essential requirements of effective access control or flawed assumptions about the kinds of requests that users will make and against which the application needs to defend itself:

  • Do not rely on users' ignorance of application URLs or the identifiers used to specify application resources, such as account numbers and document IDs. Assume that users know every application URL and identifier, and ensure that the application's access controls alone are sufficient to prevent unauthorized access.
  • Do not trust any user-submitted parameters to signify access rights (such as admin=true).
  • Do not assume that users will access application pages in the intended sequence. Do not assume that...