Download Cross Site Scripting Attacks by Jay Beale PDF

By Jay Beale

Pass website Scripting assaults begins by means of defining the phrases and laying out the floor paintings. It assumes that the reader is aware simple net programming (HTML) and JavaScript. First it discusses the ideas, technique, and expertise that makes XSS a sound problem. It then strikes into some of the forms of XSS assaults, how they're carried out, used, and abused. After XSS is carefully explored, the subsequent half presents examples of XSS malware and demonstrates actual situations the place XSS is a deadly threat that exposes web clients to distant entry, delicate information robbery, and financial losses. ultimately, the publication closes via interpreting the methods builders can stay away from XSS vulnerabilities of their net functions, and the way clients can keep away from changing into a sufferer. The viewers is net builders, safeguard practitioners, and managers.*XSS Vulnerabilities exist in eight out of 10 internet sites*The authors of this booklet are the undisputed best authorities*Contains self sufficient, bleeding side learn, code listings and exploits that can't be came across wherever else

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Extra resources for Cross Site Scripting Attacks

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17, the DOM contains a long list of elements. The DOM element alert is a standard built-in function, while logout is a function provided by Google Inc. By using FireBug DOM Explorer, we can examine each part of the currently opened application. We can see all functions and their source code. We can also see every property and object that is available and expand them to see their sub-properties in a tree-like structure. 18). This view is extremely helpful when we want to monitor the Web requests that are made from inside the application.

27 shows the Host header injected in the Modify Headers window. Probably one of the most useful purposes of this extension is to locate XSS vulnerabilities that occur when different encodings are used. Keep in mind that XSS issues are not that straightforward, and if you cannot find a particular application vulnerability when using the default configuration of your browser, it may appear as such if you change a few things, like the accepted charset as discussed previously in this section. 27 Injecting the Host Header with Modify Headers TamperData Another useful extension that you can put together with the LiveHTTPHeaders and ModifyHeaders extensions is TamperData.

In this case, we can use “View Generated Source” to see what that JavaScript function has done to the page: ... jpg" border="0">

XSS Defacement

... This can be highly useful in dozens of different applications, but most importantly it can help you diagnose what your own scripts are doing when they fail.

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