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On the Incoherencies in Web Browser Access Control Policies
On the Incoherencies in Web Browser Access Control Policies Kapil Singh∗, Alexander Moshchuk†, Helen J. Wang† and Wenke Lee∗ ∗Georgia Institute of Technology, Atlanta, GA Email: {ksingh, wenke}@cc.gatech.edu †Microsoft Research, Redmond, WA Email: {alexmos, helenw}@microsoft.com Abstract—Web browsers’ access control policies have evolved Inconsistent principal labeling. Today’s browsers do piecemeal in an ad-hoc fashion with the introduction of new not have the same principal definition for all browser re- browser features. This has resulted in numerous incoherencies. sources (which include the Document Object Model (DOM), In this paper, we analyze three major access control flaws in today’s browsers: (1) principal labeling is different for different network, cookies, other persistent state, and display). For resources, raising problems when resources interplay, (2) run- example, for the DOM (memory) resource, a principal is time changes to principal identities are handled inconsistently, labeled by the origin defined in the same origin policy and (3) browsers mismanage resources belonging to the user (SOP) in the form of <protocol, domain, port> [4]; but principal. We show that such mishandling of principals leads for the cookie resource, a principal is labeled by <domain, to many access control incoherencies, presenting hurdles for > web developers to construct secure web applications. path . Different principal definitions for two resources are A unique contribution of this paper is to identify the com- benign as long as the two resources do not interplay with patibility cost of removing these unsafe browser features. To do each other. However, when they do, incoherencies arise. For this, we have built WebAnalyzer, a crawler-based framework example, when cookies became accessible through DOM’s for measuring real-world usage of browser features, and used “document” object, DOM’s access control policy, namely the it to study the top 100,000 popular web sites ranked by Alexa. -
Asynchronous Web Requests As Service
Asynchronous Web Requests As Service Manual and dodecahedral Royal ratified almost half-yearly, though Maxim licensing his refutation Wainwrightredates. Wallache paralysing stared closely leadenly? and tyrannises Godfree often her Pete. stages inoffensively when psycholinguistic Many kinds of business processes have these features. Professional Services Engineer at elastic. About Attaching Policies to Callback Clients. The new mapper, as a site is asynchronous web requests service as mechanisms for? Web Service improve response? When using the synchronous execution mode, the application must wait for the request to confess and clamp the results. Sets DOMReady to luggage and assigns a ready function to settings. An error occurred and moment were unable to loathe your request. There mat be gaps or spaces in between characters. Gaps between programs and add too many more asynchronous result will all asynchronous web service is this example? Scripting on pay page enhances content navigation, but does task change their content that any way. Specify whether the asynchronous as instances in? How google webmaster central time, magento creates an interface at what can add support asynchronous communications at ultra low by travel, service requests as asynchronous web url is an order. To monitor the SOAP messages, insert the software listener between heat flow by the service. Understanding the address the trading application as asynchronous web requests service port types of performance, the operation of hazardous material is a really exist? Younger students have clarity on your free to code execution first, the asynchronous web requests as service? To do surprise you gave use an asynchronous generator that yields bytes. -
Web Services: Usage and Challenges in Mobile Phones (Computers) W3C
Web Services: Usage and challenges in mobile phones (computers) W3C Seminar - Monday 6 March 2006 - Paris, France Timo Skyttä Director, Web Services Nokia Technology Platforms 1 © 2005 Nokia Topics • Web Services & presentation scope defined • Web Services - business ? ¡Si, habla Web Services! • Challenges in general, and some mobile specific.... • Nokia Web Services • Application Examples 2 © 2005 Nokia The Web and Web Services Web Services connect The Web connects computer applications people to information to each other on a global scale on a global scale (GARTNER, Oct 2005) 3 © 2005 Nokia Two models of mobilising service access Presentation Browser Application Presentation and Service Logic Service Logic HTTP server Scope of this Web Services interfaces presentation Enterprise Service Oriented Application Architecture (SOA) Integration (EAI) 4 © 2005 Nokia Web Services - business ? 5 © 2005 Nokia Why Web Services The deployment of Web Services technology aims to enhance existing services and to create new and innovative services. • Web Services are being widely deployed; Service/Consumer• to facilitate interoperability across runtime different hardware independence and software ! implementations, machine architectures and application programming interfaces (APIs). • to offer near-term benefits by enabling quicker and cheaper integration of existing Interoperabilityservices. ! • to define an environment where applications can be created by combining multiple services in a single workflow (a.k.a. mashups). This will make it easy to adjust Automaticapplication functionality, code because generation services can be added (WSDL or removed + from tools) the ! application workflow. • In addition, interoperability will allow application designers to replace one service implementation with another for technical or business reasons. This vision of Service-Oriented Architectures (SOAs) is rapidly becoming a reality through the standardization and deployment of Web Services technology. -
Web API and Microsoft Azure
[ 1 ] www.it-ebooks.info Building Web Services with Microsoft Azure Quickly develop scalable, REST-based applications or services and learn how to manage them using Microsoft Azure Alex Belotserkovskiy Stephen Kaufman Nikhil Sachdeva professional expertise distilled PUBLISHING BIRMINGHAM - MUMBAI www.it-ebooks.info Building Web Services with Microsoft Azure Copyright © 2015 Packt Publishing All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews. Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the authors, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book. Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information. First published: May 2015 Production reference: 1220515 Published by Packt Publishing Ltd. Livery Place 35 Livery Street Birmingham B3 2PB, UK. ISBN 978-1-78439-837-8 www.packtpub.com www.it-ebooks.info Credits Authors Copy Editors Alex Belotserkovskiy Pranjali -
A Field Guide to Web Apis by Kin Lane Contents
A field guide to web APIs By Kin Lane Contents Executive summary 4 What are APIs used for? 5 Open data . 5 Websites . 5 Mobile . 5. Automobiles . 6. Homes and buildings . 6 Why are web APIs different? 7 They build on existing web architecture . 7. Intuitive resources . 7 Simplicity rules . 8. Easy to understand for developers and even nondevelopers . 8. Self-service resources . 8 . History of web APIs 9 Commerce . 9 . Social . 9 . Cloud computing . .9 . Mobile . .10 . What technology goes into an API? 11 REST . 11. JSON . 11 Security . 11 . Keys . 11 . Basic auth . 12 Open authorization . 12 . Webhooks . 12 Deploying your web API 13 Do-it-yourself approaches . 13 Cloud solutions . 13 . Enterprise gateways . 13 . Established practices for managing APIs 14 Self-service . 14 . Getting started . .14 . Documentation . 15 . Code samples . 15. 2 A field guide to web APIs Support and feedback loops . 15 . The legal aspect . 15. Developer dashboard . 16 Marketing and API evangelism 17 Goals . 17 User engagement . .17 . Blogging . 17 Landscape analysis . 18 . GitHub . .18 . Social . 18. Events . 19. The future of web APIs 20 API aggregation . 20 . Real-time APIs . 20. Backend as a Service (BaaS) . 20 . Automation . 20 Voice . 21. Internet of things . 21. Cloud trends 22 Maturity of IaaS layer . 22. Opportunities in the PaaS layer . .22 . Key takeaways 23 About Kin Lane 23 3 A field guide to web APIs Executive summary A new breed of web API has emerged, delivering a vision of a lightweight, low-cost approach to connect devices and allowing applications to exchange data efficiently. This research report is a field guide for web API providers, developers, and even nondevelopers . -
Modern Web Application Frameworks
MASARYKOVA UNIVERZITA FAKULTA INFORMATIKY Û¡¢£¤¥¦§¨ª«¬Æ°±²³´µ·¸¹º»¼½¾¿Ý Modern Web Application Frameworks MASTER’S THESIS Bc. Jan Pater Brno, autumn 2015 Declaration Hereby I declare, that this paper is my original authorial work, which I have worked out by my own. All sources, references and literature used or ex- cerpted during elaboration of this work are properly cited and listed in complete reference to the due source. Bc. Jan Pater Advisor: doc. RNDr. Petr Sojka, Ph.D. i Abstract The aim of this paper was the analysis of major web application frameworks and the design and implementation of applications for website content ma- nagement of Laboratory of Multimedia Electronic Applications and Film festival organized by Faculty of Informatics. The paper introduces readers into web application development problematic and focuses on characte- ristics and specifics of ten selected modern web application frameworks, which were described and compared on the basis of relevant criteria. Practi- cal part of the paper includes the selection of a suitable framework for im- plementation of both applications and describes their design, development process and deployment within the laboratory. ii Keywords Web application, Framework, PHP,Java, Ruby, Python, Laravel, Nette, Phal- con, Rails, Padrino, Django, Flask, Grails, Vaadin, Play, LEMMA, Film fes- tival iii Acknowledgement I would like to show my gratitude to my supervisor doc. RNDr. Petr So- jka, Ph.D. for his advice and comments on this thesis as well as to RNDr. Lukáš Hejtmánek, Ph.D. for his assistance with application deployment and server setup. Many thanks also go to OndˇrejTom for his valuable help and advice during application development. -
Using Replicated Execution for a More Secure and Reliable Web Browser
Using Replicated Execution for a More Secure and Reliable Web Browser Hui Xue Nathan Dautenhahn Samuel T. King University of Illinois at Urbana Champaign huixue2, dautenh1, kingst @uiuc.edu { } Abstract Unfortunately, hackers actively exploit these vulnerabil- ities as indicated in reports from the University of Wash- Modern web browsers are complex. They provide a ington [46], Microsoft [61], and Google [49, 48]. high-performance and rich computational environment Both industry and academia have improved the se- for web-based applications, but they are prone to nu- curity and reliability of web browsers. Current com- merous types of security vulnerabilities that attackers modity browsers make large strides towards improving actively exploit. However, because major browser plat- the security and reliability of plugins by using sandbox- forms differ in their implementations they rarely exhibit ing techniques to isolate plugins from the rest of the the same vulnerabilities. browser [62, 33]. However, these browsers still scatter In this paper we present Cocktail, a system that uses security logic throughout millions of lines of code, leav- three different off-the-shelf web browsers in parallel to ing these systems susceptible to browser-based attacks. provide replicated execution for withstanding browser- Current research efforts, like Tahoma [32], the OP web based attacks and improving browser reliability. Cock- browser [36], the Gazelle web browser [59], and the Illi- tail mirrors inputs to each replica and votes on browser nois Browser Operating System [58] all propose build- states and outputs to detect potential attacks, while con- ing new web browsers to improve security. Although tinuing to run. -
HTTP Cookie - Wikipedia, the Free Encyclopedia 14/05/2014
HTTP cookie - Wikipedia, the free encyclopedia 14/05/2014 Create account Log in Article Talk Read Edit View history Search HTTP cookie From Wikipedia, the free encyclopedia Navigation A cookie, also known as an HTTP cookie, web cookie, or browser HTTP Main page cookie, is a small piece of data sent from a website and stored in a Persistence · Compression · HTTPS · Contents user's web browser while the user is browsing that website. Every time Request methods Featured content the user loads the website, the browser sends the cookie back to the OPTIONS · GET · HEAD · POST · PUT · Current events server to notify the website of the user's previous activity.[1] Cookies DELETE · TRACE · CONNECT · PATCH · Random article Donate to Wikipedia were designed to be a reliable mechanism for websites to remember Header fields Wikimedia Shop stateful information (such as items in a shopping cart) or to record the Cookie · ETag · Location · HTTP referer · DNT user's browsing activity (including clicking particular buttons, logging in, · X-Forwarded-For · Interaction or recording which pages were visited by the user as far back as months Status codes or years ago). 301 Moved Permanently · 302 Found · Help 303 See Other · 403 Forbidden · About Wikipedia Although cookies cannot carry viruses, and cannot install malware on 404 Not Found · [2] Community portal the host computer, tracking cookies and especially third-party v · t · e · Recent changes tracking cookies are commonly used as ways to compile long-term Contact page records of individuals' browsing histories—a potential privacy concern that prompted European[3] and U.S. -
Attacking AJAX Web Applications Vulns 2.0 for Web 2.0
Attacking AJAX Web Applications Vulns 2.0 for Web 2.0 Alex Stamos Zane Lackey [email protected] [email protected] Blackhat Japan October 5, 2006 Information Security Partners, LLC iSECPartners.com Information Security Partners, LLC www.isecpartners.com Agenda • Introduction – Who are we? – Why care about AJAX? • How does AJAX change Web Attacks? • AJAX Background and Technologies • Attacks Against AJAX – Discovery and Method Manipulation – XSS – Cross-Site Request Forgery • Security of Popular Frameworks – Microsoft ATLAS – Google GWT –Java DWR • Q&A 2 Information Security Partners, LLC www.isecpartners.com Introduction • Who are we? – Consultants for iSEC Partners – Application security consultants and researchers – Based in San Francisco • Why listen to this talk? – New technologies are making web app security much more complicated • This is obvious to anybody who reads the paper – MySpace – Yahoo – Worming of XSS – Our Goals for what you should walk away with: • Basic understanding of AJAX and different AJAX technologies • Knowledge of how AJAX changes web attacks • In-depth knowledge on XSS and XSRF in AJAX • An opinion on whether you can trust your AJAX framework to “take care of security” 3 Information Security Partners, LLC www.isecpartners.com Shameless Plug Slide • Special Thanks to: – Scott Stender, Jesse Burns, and Brad Hill of iSEC Partners – Amit Klein and Jeremiah Grossman for doing great work in this area – Rich Cannings at Google • Books by iSECer Himanshu Dwivedi – Securing Storage – Hackers’ Challenge 3 • We are -
Pro ASP.NET MVC 3 Framework Third Edition
Pro ASP.NET MVC 3 Framework Third Edition ADAM FREEMAN STEVEN SANDERSON ApressB Contents J About the Authors xxiii About the Technical Reviewer xxiv Acknowledgments xxv Part 1: Introducing ASP.NET MVC 3 1 Chapter 1: What's the Big Idea? 3 A Brief History of Web Development 3 Traditional ASP.NET Web Forms 5 What's Wrong with ASP.NET Web Forms? 6 Web Development Today 7 Web Standards and REST 7 Agile and Test-Driven Development 7 Ruby on Rails 8 Sinatra 8 Node.js 9 Key Benefits of ASP.NET MVC 9 MVC Architecture 10 Extensibility 10 Tight Control over HTML and HTTP 11 Testability 11 Powerful Routing System 11 Built on the Best Parts of the ASP.NET Platform 12 Modern API 12 ASP.NET MVC Is Open Source 13 Who Should Use ASP.NET MVC? 13 Comparisons with ASP.NET Web Forms 13 Migrating from Web Forms to MVC 14 Comparisons with Ruby on Rails 14 Comparisons with MonoRail 14 What's New in ASP.NET MVC 3 15 Summary 15 Chapter 2: Getting Ready 17 Preparing the Workstation , 17 Installing Visual Studio 2010 17 Installing the Essential Software 19 Installing Optional Components 21 Preparing the Server 22 Enabling the Web Server Role 23 Installing Additional Components 25 Setting up Web Deployment , 26 Getting Further Information 30 Summary 30 Chapter 3: Your First MVC Application 31 Creating a New ASP.NET MVC Project .31 Adding the First Controller 33 Understanding Routes 36 Rendering Web Pages 37 Creating and Rendering a View 37 Adding Dynamic Output 41 Creating a Simple Data-Entry Application 42 Setting the Scene 42 Designing a Data Model 43 Linking -
Introduction to Concurrent Programming
Introduction to Concurrent Programming Rob Pike Computing Sciences Research Center Bell Labs Lucent Technologies [email protected] February 2, 2000 1 Overview The world runs in parallel, but our usual model of software does not. Programming languages are sequential. This mismatch makes it hard to write systems software that provides the interface between a computer (or user) and the world. Solutions: processes, threads, concurrency, semaphores, spin locks, message-passing. But how do we use these things? Real problem: need an approach to writing concurrent software that guides our design and implementation. We will present our model for designing concurrent software. It’s been used in several languages for over a decade, producing everything from symbolic algebra packages to window systems. This course is not about parallel algorithms or using multiprocessors to run programs faster. It is about using the power of processes and communication to design elegant, responsive, reliable systems. 2 History (Biased towards Systems) Dijkstra: guarded commands, 1976. Hoare: Communicating Sequential Processes (CSP), (paper) 1978. Run multiple communicating guarded command sets in parallel. Hoare: CSP Book, 1985. Addition of channels to the model, rather than directly talking to processes. Cardelli and Pike: Squeak, 1983. Application of CSP model to user interfaces. Pike: Concurrent Window System, (paper) 1988. Application of Squeak approach to systems software. Pike: Newsqueak, 1989. Interpreted language; used to write toy window system. Winterbottom: Alef, 1994. True compiled concurrent language, used to write production systems software. Mullender: Thread library, 1999. Retrofit to C for general usability. 3 Other models exist Our approach is not the only way. -
Selenium Python Bindings Release 2
Selenium Python Bindings Release 2 Baiju Muthukadan Sep 03, 2021 Contents 1 Installation 3 1.1 Introduction...............................................3 1.2 Installing Python bindings for Selenium.................................3 1.3 Instructions for Windows users.....................................3 1.4 Installing from Git sources........................................4 1.5 Drivers..................................................4 1.6 Downloading Selenium server......................................4 2 Getting Started 7 2.1 Simple Usage...............................................7 2.2 Example Explained............................................7 2.3 Using Selenium to write tests......................................8 2.4 Walkthrough of the example.......................................9 2.5 Using Selenium with remote WebDriver................................. 10 3 Navigating 13 3.1 Interacting with the page......................................... 13 3.2 Filling in forms.............................................. 14 3.3 Drag and drop.............................................. 15 3.4 Moving between windows and frames.................................. 15 3.5 Popup dialogs.............................................. 16 3.6 Navigation: history and location..................................... 16 3.7 Cookies.................................................. 16 4 Locating Elements 17 4.1 Locating by Id.............................................. 18 4.2 Locating by Name............................................ 18 4.3