CHAPTER 5. Attacking User-Supplied Input Data

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What’s In This Chapter?

This chapter details methods of tampering with input data that is passed from the client machine to the Web application that resides on the Web server. These attacks are mandatory for any Web application and represent some of the most commonly exploited vulnerabilities in modern Web applications.

Introduction

When a Web application or any program reads user-supplied input, many things can go wrong. The input may be too long, of the wrong type (for example, the user may have entered a character where a number was expected), or represent an illegal or harmful value (a user ...

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