Download Ajax Security by Billy Hoffman PDF

By Billy Hoffman

ISBN-10: 0321491939

ISBN-13: 9780321491930

This e-book might be required interpreting for a person who's constructing, operating with, or perhaps dealing with an online software. the appliance does not also have to exploit Ajax. lots of the thoughts during this publication are safeguard practices for non-Ajax functions which were prolonged and utilized to Ajax; no longer the wrong way round. for instance, SQL injection assaults can exist no matter if an software makes use of Ajax or now not, yet Ajax offers an attacker different "entry issues" to attempt to assault your software. every one carrier, process, and parameter is taken into account an access point.

The ebook itself is easily written. the fashion of writing is attractive. the one non-exciting a part of the e-book is the bankruptcy on patron aspect garage (i.e. cookies, Flash facts items, neighborhood storage), yet this isn't the authors' fault. the subject itself isn't very interesting and that i chanced on myself analyzing it quick so i may get to the subsequent bankruptcy. some of the most fascinating chapters is the only on JavaScript worms, just like the Samy malicious program. additionally attention-grabbing are the occasional mentions of reviews and discoveries within the defense neighborhood. 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 net server they run (using the JS photo object). one other attention-grabbing instance was once utilizing the :hover CSS classification besides JavaScript to become aware of websites consumer has visited.

After interpreting this booklet, i'm discovering myself correcting safety mistakes i'm purely be aware of discovering in my initiatives. a few corrections i have made crisis JSON, the GET vs. publish factor, and others. With the corrections made, i think that my functions are much more secure. This booklet helped make that take place.

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For these reasons, many software industry analysts predict that Ajax will become a widely-adopted major technology. 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.

Eve now understands the format of the requests to the flight search Web service. Eve knows that the departure airport, destination airport, and flight are all most likely passed to a database of some kind to find matching flights. Eve decides to try a simple probe to see if this backend database might be susceptible to a SQL Injection attack. She configures her proxy with some find-andreplace rules. net. Eve’s ' OR probe in each value might create a syntax error in the database query and give her a database error message.

He could • • Omit the authentication, balance checking, and account debiting steps and simply call the downloadSong method directly. This gives him all the free music he wants! 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.

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