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
About the Authors
About the Technical Editor
MDSec: The Authors’ Company
End User License Agreement

Harvesting Useful Data

The second main use of customized automation when attacking an application is to extract useful or sensitive data by using specific crafted requests to retrieve the information one item at a time. This situation most commonly arises when you have identified an exploitable vulnerability, such as an access control flaw, that enables you to access an unauthorized resource by specifying an identifier for it. However, it may also arise when the application is functioning entirely as intended by its designers. Here are some examples of cases where automated data harvesting may be useful:

  • An online retailing application contains a facility for registered customers to view their pending orders. However, if you can determine the order numbers assigned to other customers, you can view their order information in the same way as your own.
  • A forgotten password function relies on a user-configurable challenge. You can submit an arbitrary username and view the associated challenge...