Billy Hoffman's Ajax Security PDF

By Billy Hoffman

ISBN-10: 0321491939

ISBN-13: 9780321491930

The Hands-On, sensible advisor to fighting Ajax-Related protection Vulnerabilities   increasingly more sites are being rewritten as Ajax functions; even conventional laptop software program is swiftly relocating to the net through Ajax. yet, all too usually, this transition is being made with reckless omit for protection. If Ajax functions aren’t designed and coded appropriately, they are often prone to way more risky protection vulnerabilities than traditional net or machine software program. Ajax builders desperately desire counsel on securing their functions: wisdom that’s been nearly very unlikely to discover, beforehand.             Ajax protection systematically debunks today’s most deadly myths approximately Ajax safety, illustrating key issues with specified case experiences of tangible exploited Ajax vulnerabilities, starting from MySpace’s Samy trojan horse to MacWorld’s convention code validator. much more very important, it promises particular, up to date innovations for securing Ajax functions in every one significant internet programming language and atmosphere, together with .NET, Java, Hypertext Preprocessor, or even Ruby on Rails. You’ll how one can:   ·        Mitigate distinctive dangers linked to Ajax, together with overly granular net companies, program regulate circulation tampering, and manipulation of application good judgment ·        Write new Ajax code extra safely—and establish and attach flaws in present code ·        hinder rising Ajax-specific assaults, together with JavaScript hijacking and protracted garage robbery ·        keep away from assaults in accordance with XSS and SQL Injection—including a perilous SQL Injection variation which can extract a complete backend database with simply requests ·        Leverage safeguard 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” purposes   Ajax protection can be an essential source for builders coding or holding Ajax functions; architects and improvement managers making plans or designing new Ajax software program, and all software program safety pros, from QA experts to penetration testers.

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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.

As we will see, Ajax applications straddle the line between these two groups, and it is exactly this property that makes the applications so difficult to properly secure. THICK-CLIENT ARCHITECTURE Thick-client applications perform the majority of their processing on the client machine. They are typically installed on a desktop computer and then configured to communicate with a remote server. The remote server maintains some set of resources that are shared among all clients, such as a database or file share.

This is a problem because the server methods are accessible not just by the client-side code that the developers wrote, but by any outside party as well. An attacker may choose to call your server-side code in a completely different manner than you originally intended. As an example, look at the following block of client-side JavaScript from an online music store. '); return; } // debit the user's account debitAccount(username, songPrice); // start downloading the song to the client machine downloadSong(songId); } In this example, the server API has exposed five methods: 1.

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Ajax Security by Billy Hoffman


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