Billy Hoffman's Ajax Security PDF

By Billy Hoffman

ISBN-10: 0321491939

ISBN-13: 9780321491930

The Hands-On, functional consultant to combating Ajax-Related safety Vulnerabilities   a growing number of websites are being rewritten as Ajax functions; even conventional laptop software program is quickly relocating to the net through Ajax. yet, all too usually, this transition is being made with reckless overlook for safeguard. If Ajax functions aren’t designed and coded effectively, they are often prone to way more harmful safeguard vulnerabilities than traditional net or computing device software program. Ajax builders desperately want assistance on securing their purposes: wisdom that’s been nearly most unlikely to discover, before.             Ajax safeguard systematically debunks today’s most deadly myths approximately Ajax protection, illustrating key issues with exact case reports of tangible exploited Ajax vulnerabilities, starting from MySpace’s Samy malicious program to MacWorld’s convention code validator. much more very important, it promises particular, up to the moment thoughts for securing Ajax purposes in every one significant internet programming language and surroundings, together with .NET, Java, personal home page, or even Ruby on Rails. You’ll how you can:   ·        Mitigate detailed hazards linked to Ajax, together with overly granular internet companies, program regulate circulation tampering, and manipulation of software common sense ·        Write new Ajax code extra safely—and establish and fasten flaws in latest code ·        hinder rising Ajax-specific assaults, together with JavaScript hijacking and protracted garage robbery ·        steer clear of assaults in accordance with XSS and SQL Injection—including a perilous SQL Injection version that may extract a whole 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 defense could be an integral source for builders coding or conserving Ajax functions; architects and improvement managers making plans or designing new Ajax software program, and all software program protection execs, from QA experts to penetration testers.

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In terms of security, however, Ajax is actually the worst of both worlds. It has the inherent security vulnerabilities of both architectures. 15 CHAPTER 1 INTRODUCTION TO AJAX SECURITY Query database Filter query results Determine ship date Write bill of materials Server responsibilities Display UI Handle user input Calculate order cost Client responsibilities Figure 1-8 A sample Ajax architecture: evenly balanced between the client and server A SECURITY PERSPECTIVE:THICK-CLIENT APPLICATIONS The major security concern with thick-client applications is that so much of the application logic resides on the user’s machine—outside the effective control of the owner.

With client-side data transformation, which is usually found only in Ajax applications, Eve can piggyback malicious SQL queries and capture the raw database results as they are sent to the client-side JavaScript for formatting. Figure 2-5 Eve’s probes caused an ODBC error. Client-side JavaScript suppresses the error, and it does not appear in her Web browser. Eve fires up another tool, her HTTP editor. This tool allows Eve to craft raw HTTP requests to the Web server instead of using find-and-replace rules in the proxy to inject malicious data.

Change the price of the song by modifying the value of the songPrice variable. While it is true that he can already get songs for free simply by skipping over the 21 CHAPTER 1 • INTRODUCTION TO AJAX SECURITY debitAccount function, he might check to see if the server accepts negative values for the songPrice parameter. If this worked, the store would actually be paying the hacker to take the music. Obtain the current balance of any user’s account. Because the getAccountBalance function does not require a corresponding password parameter for the username parameter, that information is available just by knowing the username.

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Ajax Security by Billy Hoffman

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