Get Ajax Security PDF

By Billy Hoffman

ISBN-10: 0321491939

ISBN-13: 9780321491930

This e-book might be required examining for someone who's constructing, operating with, or perhaps coping with an internet program. the appliance does not also have to take advantage of Ajax. many of the options during this publication are protection practices for non-Ajax purposes which were prolonged and utilized to Ajax; now not the wrong way round. for instance, SQL injection assaults can exist no matter if an software makes use of Ajax or no longer, yet Ajax offers an attacker different "entry issues" to aim to assault your program. every one carrier, strategy, and parameter is taken into account an access point.

The publication itself is easily written. the fashion of writing is attractive. the one non-exciting a part of the booklet is the bankruptcy on shopper facet garage (i.e. cookies, Flash information gadgets, neighborhood storage), yet this isn't the authors' fault. the subject itself isn't very fascinating and that i came upon myself analyzing it speedy so i may get to the subsequent bankruptcy. some of the most attention-grabbing chapters is the single on JavaScript worms, just like the Samy bug. additionally fascinating are the occasional mentions of reports and discoveries within the safety group. for instance, the authors describe a proof-of-concept port scanner they wrote utilizing JavaScript on my own, which has the potential of scanning IP addresses and detecting the kind of internet server they run (using the JS snapshot object). one other fascinating instance used to be utilizing the :hover CSS type besides JavaScript to discover websites person has visited.

After analyzing this publication, i'm discovering myself correcting protection mistakes i'm basically be aware of discovering in my tasks. a few corrections i have made quandary JSON, the GET vs. put up factor, and others. With the corrections made, i believe that my purposes are much more secure. This e-book helped make that ensue.

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Extra info for Ajax Security

Sample text

This also made it impossible to use DHTML for applications that need to be continuously updated with fresh data, like stock tickers. It was not until the invention of XHR and Ajax that applications like these could be developed. AJAX:THE GOLDILOCKS OF ARCHITECTURE So, where does Ajax fit into the architecture scheme? Is it a thick-client architecture or a thin-client architecture? Ajax applications function in a Web browser and are not installed on the user’s machine, which are traits of thin-client architectures.

The JavaScript Standard While it is possible to write the client-side script of Ajax applications in a language other than JavaScript, it is the de facto standard for the Web world. As such, we will refer to JavaScript, alone, throughout this chapter. However, it is important to note that the security risks detailed in this chapter are not specific to JavaScript; any scripting language would share the same threats. Switching to VBScript or any other language will not help you create a more secure application.

ATTACKING THE AJAX API Eve decides to take a closer look at the pages she has seen so far. js. js. js contains the isCouponValid function even though only the checkout pages use it. js used by Web pages that Eve hasn’t seen yet. NET There could even be administrative functions that visitors aren’t supposed to use! Eve looks through the list of variables and functions found by her JavaScript Reverser and almost skips right past it. addUser, shown toward the middle of Figure 2-8. addUser. The function itself doesn’t tell Eve very much.

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Ajax Security by Billy Hoffman


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