New PDF release: Ajax Security

By Billy Hoffman

ISBN-10: 0321491939

ISBN-13: 9780321491930

The Hands-On, sensible advisor to combating Ajax-Related protection Vulnerabilities   progressively more websites are being rewritten as Ajax functions; even conventional computing device software program is speedily relocating to the internet through Ajax. yet, all too frequently, this transition is being made with reckless put out of your mind for safety. If Ajax functions aren’t designed and coded correctly, they are often prone to way more risky safety vulnerabilities than traditional net or computer software program. Ajax builders desperately desire information on securing their functions: wisdom that’s been nearly very unlikely to discover, before.             Ajax defense systematically debunks today’s most threatening myths approximately Ajax defense, illustrating key issues with precise case reviews of exact exploited Ajax vulnerabilities, starting from MySpace’s Samy bug to MacWorld’s convention code validator. much more vital, it gives you particular, up to date techniques for securing Ajax purposes in each one significant net programming language and setting, together with .NET, Java, Hypertext Preprocessor, or even Ruby on Rails. You’ll tips on how to:   ·        Mitigate specific dangers linked to Ajax, together with overly granular net companies, program keep watch over circulation tampering, and manipulation of software common sense ·        Write new Ajax code extra safely—and determine and fasten flaws in current code ·        hinder rising Ajax-specific assaults, together with JavaScript hijacking and protracted garage robbery ·        stay away from assaults in response to XSS and SQL Injection—including a deadly SQL Injection variation that could extract a complete backend database with simply requests ·        Leverage safety outfitted into Ajax frameworks like Prototype, Dojo, and ASP.NET AJAX Extensions—and realize what you continue to needs to enforce by yourself ·        Create safer “mashup” functions   Ajax protection may be an vital source for builders coding or conserving Ajax purposes; architects and improvement managers making plans or designing new Ajax software program, and all software program safeguard pros, from QA experts to penetration testers.

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While this is true for all architectures, thin-client programs (especially Web applications) tend to make many more round-trips than thick-client programs. Furthermore, Web applications communicate in HTTP, a wellknown, text-based protocol. If an attacker were to intercept an HTTP message, he could probably understand the contents. Thick-client programs often communicate in binary protocols, which are much more difficult for a third-party to interpret. Before, we ran 17 CHAPTER 1 INTRODUCTION TO AJAX SECURITY into security problems by leaving secrets on the user’s machine, outside of our control.

They don’t take up much space on the user’s machine. They don’t use much memory when they run. Most Web applications have a zero-footprint install, meaning they don’t require any disk space on the client machine at all. Query database Filter query results Calculate order cost Determine ship date Write bill of materials Server responsibilities Display UI Client responsibilities Figure 1-7 14 A sample thin-client architecture Handle user input THE AJAX ARCHITECTURE SHIFT Users were thrilled with the advantages that thin-client Web applications provided, but eventually the novelty of the Web started to wear off.

Furthermore, as we just mentioned in the previous section, the most commonly used client-side languages (including JavaScript) are interpreted languages rather than compiled languages. In other words, the client-side portion of the application is sent in raw source code form to the client, where anyone can read it. Additionally, in order for Ajax client code to communicate effectively with the corresponding server portion of the application, the server code needs to provide what is essentially an application programming interface (API) to allow clients to access it.

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Ajax Security by Billy Hoffman

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