Showing posts with label firefox. Show all posts
Showing posts with label firefox. Show all posts

XSS Attacks: Cross Site Scripting Exploits and Defense Review

XSS Attacks: Cross Site Scripting Exploits and Defense
Average Reviews:

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XSS Attacks earns 4 stars for being the first book devoted to Cross Site Scripting and for rounding up multiple experts on the topic. The authors are synonymous with attacking Web applications and regularly share their vast expertise via their blogs and tools. However, XSS Attacks suffers the same problems found whenever Syngress rushes a book to print -- nonexistent editing and uneven content. I found XSS Attacks to be highly enlightening, but I expect a few other books on the topic arriving later this year could be better.
First, as Tadaka mentioned, ch 3 is the best written part of the book. In fact, the author of ch 3 should have written the entire book. There is a difference between an author of a tool, an author of a blog, and an author of a book. The author of ch 3 clearly knows how to make a clear argument over the course of a long stretch of pages (over 90) and carry the reader. Lucky for non-book-buyers, Syngress posted ch 3 for free on their Web site. You'll get a great foundation on XSS, and learn about CSRF and backdooring Flash and Quicktime.
In terms of readability, ch 2 wasn't bad. I liked trying out various Firefox extensions and the author's examples were good. I think ch 1 should be completely dropped. It mentions terms not defined until ch 2. The language is exceptionally rough, indicating zero editing was done. The DNS pinning examples in ch 5 were confusing; it doesn't help novice readers to discuss [...] and then use [...]. (I think that's an error.) I really didn't get as much from the book past ch 3 as I did from ch 3.
The major take-away from XSS Attacks is that one should never trust clients. Furthermore, far too many vulnerable capabilities exist in applications most people would never dream of fearing, like those that render .pdf or .swf. I really liked the point that browsers constantly interpret and "fix" broken HTML, sometimes to the detriment of the security world. I also liked reading how users can be duped by attacks against the integrity of data, such as adding or removing details of Web sites.
Right now, if you want to learn more about recent XSS attacks in printed form, this book is your main option. Last year I favorably reviewed Lance James' book, Phishing Exposed, which includes some of these techniques. Later this year one of the other book reviewers, Dafydd Stuttard, should be publishing The Web Application Hackers Handbook: Discovering and Exploiting Security Flaws. Syngress claims to be publishing Web Application Vulnerabilities: Detect, Exploit, Prevent by Steven Palmer in the fall. Hacking Exposed Web 2.0 by Himanshu Dwivedi is another option, but I find his security books to be poorly written. I highly recommend visiting the authors' blogs, since they cover a lot of the information in XSS Attacks.

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Cross Site Scripting Attacks starts by defining the terms and laying out the ground work. It assumes that the reader is familiar with basic web programming (HTML) and JavaScript. First it discusses the concepts, methodology, and technology that makes XSS a valid concern. It then moves into the various types of XSS attacks, how they are implemented, used, and abused. After XSS is thoroughly explored, the next part provides examples of XSS malware and demonstrates real cases where XSS is a dangerous risk that exposes internet users to remote access, sensitive data theft, and monetary losses. Finally, the book closes by examining the ways developers can avoid XSS vulnerabilities in their web applications, and how users can avoid becoming a victim. The audience is web developers, security practitioners, and managers.*XSS Vulnerabilities exist in 8 out of 10 Web sites*The authors of this book are the undisputed industry leading authorities*Contains independent, bleeding edge research, code listings and exploits that can not be found anywhere else

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Greasemonkey Hacks: Tips & Tools for Remixing the Web with Firefox Review

Greasemonkey Hacks: Tips and Tools for Remixing the Web with Firefox
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Greasemonkey (GM) is an extension (arguably one of the most useful) for the Firefox browser. GM is an agent that allows the dynamic alteration and manipulation of web pages via scripts which run after the page is loaded but before it is rendered to you. GM opens the Document Object Model (DOM) of other people's web pages up to client-side access, which gives you the power to add, remove and change the content of that web page to suit your tastes and needs - almost exactly if you had written the web page yourself. GM, however, is only the hosting engine. All the real work is performed by implementing JavaScript files, that you or someone else has written.
Greasemonkey Hacks is a great read and a valuable "ideas" asset, but only if you fit into the niche it is written for. As GM is nothing more than an interface host for dynamic scripting, not a lot other than an overview of the extension, where to get it, and a how to use its few dialogs can be written about. Indeed, it already has been covered before and is freely available on the extension's home page (Greasemonkey dot Mozdev dot Org). As GM makes the DOM available to custom JavaScripts, unless you only intend to look for and run other peoples scripts (which is quite doable as UserScripts dot Org makes hundreds of thousands of them readily available, some of which appear in this book), a working knowledge of the DOM and JavaScript is needed. The author does not spend much time covering what GM is, and very little time covering any JavaScripting or DOM objects; you are expected to already understand what you see. What this title does give you is hundreds of pages of ideas, accomplished by presenting recipe script after recipe script complete with discussions and explanations.
The book is well written, and entertaining to read. The information presented within ranges from novice to advanced (if you're into scripting) and is never dumbed down or made overly complicated. If you're really interested in writing your own web browsing "hacks", this is an excellent read as it provides a great guided introduction into the topic, beyond what you would get if you just threw yourself into the GM-related websites. If you find the possibilities tantalizing, you won't be sorry you purchased this book. But, as this is not a how-to or learning book for the DOM or for JavaScript, I couldn't recommend it above the GM websites to the casual Firefox user or those who do not script.

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Greasemonkey Hacks is an invaluable compendium 100 ingenious hacks for power users who want to master Greasemonkey, the hot new Firefox extension that allows you to write scripts that alter the web pages you visit. With Greasemonkey, you can create scripts that make a web site more usable, fix rendering bugs that site owners can't be bothered to fix themselves, or add items to a web site's menu bar. You can alter pages so they work better with technologies that speak a web page out loud or convert it to Braille. Greasemonkey gurus can even import, combine, and alter data from different web sites to meet their own specific needs.

Greasemonkey has achieved a cult-like following in its short lifespan, but its uses are just beginning to be explored. Let's say you're shopping on an e-commerce site. You can create a script that will automatically display competitive prices for that particular product from other web sites. The possibilities are limited only by your imagination and your Greasemonkey expertise. Greasemonkey Hacks can't help you with the imagination part, but it can provide the expert hacks-complete with the sample code-you need to turn your brainstorms into reality.

More than just an essential collection of made-to-order Greasemonkey solutions, Greasemonkey Hacks is crammed with sample code, a Greasemonkey API reference, and a comprehensive list of resources, to ensure that every resource you need is available between its covers.

Some people are content to receive information from websites passively; some people want to control it. If you are one of the latter, Greasemonkey Hacks provides all the clever customizations and cutting-edge tips and tools you need to take command of any web page you view.


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