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Web Security
CSE343/443 Lehigh University Fall 2015 Web Security Presenter: Yinzhi Cao Slides Inherited and Modified from Prof. John Mitchell Reported Web Vulnerabilities "In the Wild" 1200 1000 800 Input Validation 600 CSRF XSS SQLi 400 200 0 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 Web application vulnerabilities Goals of web security Safely browse the web n Users should be able to visit a variety of web sites, without incurring harm: w No stolen information (without user’s permission) w Site A cannot compromise session at Site B Secure web applications n Applications delivered over the web should have the same security properties we require for stand- alone applications Network security Network Attacker System Intercepts and controls network communication Alice Web security System Web Attacker Sets up malicious site visited by victim; no control of network Alice Web Threat Models Web attacker n Control attacker.com n Can obtain SSL/TLS certificate for attacker.com n User visits attacker.com w Or: runs attacker’s Facebook app Network attacker n Passive: Wireless eavesdropper n Active: Evil router, DNS poisoning Malware attacker n Attacker escapes browser isolation mechanisms and run separately under control of OS Malware attacker Browsers (like any software) contain exploitable bugs n Often enable remote code execution by web sites n Google study: [the ghost in the browser 2007] w Found Trojans on 300,000 web pages (URLs) w Found adware on 18,000 web pages (URLs) Even if browsers were bug-free, still lots of vulnerabilities -
Web Application Security
Web Application Security * Original slides were prepared by John Mitchell Goals of web security Safely browse the web n Users should be able to visit a variety of web sites, without incurring harm: w No stolen information w Site A cannot compromise session at Site B Support secure web applications n Applications delivered over the web should be able to achieve the same security properties as stand- alone applications Web security threat model System Web Attacker Sets up malicious site visited by victim; no control of network Alice Network security threat model Network Attacker System Intercepts and controls network communication Alice System Web Attacker Alice Network Attacker System Alice Web Threat Models Web attacker n Control attacker.com n Can obtain SSL/TLS certificate for attacker.com n User visits attacker.com w Or: runs attacker’s Facebook app, etc. Network attacker n Passive: Wireless eavesdropper n Active: Evil router, DNS poisoning Malware attacker n Attacker escapes browser isolation mechanisms and run separately under control of OS Malware attacker Browsers may contain exploitable bugs n Often enable remote code execution by web sites n Google study: [the ghost in the browser 2007] w Found Trojans on 300,000 web pages (URLs) w Found adware on 18,000 web pages (URLs) NOT OUR FOCUS Even if browsers were bug-free, still lots of vulnerabilities on the web n XSS, SQLi, CSRF, … WEB PROGRAMMING BASICS URLs Global identifiers of network-retrievable documents Example: http://columbia.edu:80/class?name=4995#homework Protocol Fragment -
Application Development with Tocollege.Net
CYAN YELLOW MAGENTA BLACK PANTONE 123 C BOOKS FOR PROFESSIONALS BY PROFESSIONALS® THE EXPERT’S VOICE® IN WEB DEVELOPMENT Companion eBook Available Covers Pro Web 2.0 Application GWT 1.5 Pro Development with GWT 2.0 Web Dear Reader, This book is for developers who are ready to move beyond small proof-of-concept Pro sample applications and want to look at the issues surrounding a real deploy- ment of GWT. If you want to see what the guts of a full-fledged GWT application look like, this is the book for you. GWT 1.5 is a game-changing technology, but it doesn’t exist in a bubble. Real deployments need to connect to your database, enforce authentication, protect against security threats, and allow good search engine optimization. To show you all this, we’ll look at the code behind a real, live web site called Application Development with ToCollege.net. This application specializes in helping students who are applying Web 2.0 to colleges; it allows them to manage their application processes and compare the rankings that they give to schools. It’s a slick application that’s ready for you to sign up for and use. Application Development This book will give you a walking tour of this modern Web 2.0 start-up’s code- base. The included source code will provide a functional demonstration of how to merge together the modern Java stack including Hibernate, Spring Security, Spring MVC 2.5, SiteMesh, and FreeMarker. This fully functioning application is better than treasure if you’re a developer trying to wire GWT into a Maven build environment who just wants to see some code that makes it work. -
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. -
Web Security 1
Web Security 1 Prof. Raluca Ada Popa Oct 16, 2017 Some content adapted from materials by David Wagner or Dan Boneh Today • We need to cover same-origin policy, cookie policy, CSRF and XSS, But do not need to cover weB injection • ScriBe: Dayeol • Presenter: Rohan, Michael HTTP (Hypertext Transfer Protocol) A common data communication protocol on the weB CLIENT BROWSER WEB SERVER safebank.com/account.html HTTP REQUEST: Alice GET /account.html HTTP/1.1 Smith Host: www.safebank.com Accounts Bill Pay Mail Transfers HTTP RESPONSE: HTTP/1.0 200 OK <HTML> . </HTML> URLs GloBal identifiers of network-retrievaBle resources Example: http://safeBank.com:81/account?id=10#statement Protocol Hostname Query Fragment Port Path HTTP CLIENT BROWSER WEB SERVER safebank.com/account.html HTTP REQUEST: Alice GET /account.html HTTP/1.1 Smith Host: www.safebank.com Accounts Bill Pay Mail Transfers HTTP RESPONSE: HTTP/1.0 200 OK <HTML> . </HTML> HTTP Request GET: no Method Path HTTP version Headers side effect GET /index.html HTTP/1.1 Accept: image/gif, image/x-bitmap, POST: image/jpeg, */* Accept-Language: en possiBle Connection: Keep-Alive User-Agent: Chrome/21.0.1180.75 (Macintosh; side effect Intel Mac OS X 10_7_4) Host: www.safebank.com Referer: http://www.google.com?q=dingbats Blank line Data – none for GET HTTP CLIENT BROWSER WEB SERVER safebank.com/account.html HTTP REQUEST: Alice GET /account.html HTTP/1.1 Smith Host: www.safebank.com Accounts Bill Pay Mail Transfers HTTP RESPONSE: HTTP/1.0 200 OK <HTML> . </HTML> HTTP Response HTTP version Status code -
Php Server Http Referer
Php Server Http Referer Dorian view partly if deprivable Gunter riled or dilacerates. Sometimes retired Randi wheedle her Klansman rather, but bright Aubrey sell unfriendly or remigrated iwis. Petrological and coldish Caleb announcing: which Ethelred is paraffinic enough? The new approach though has some view this request headers of injection in php people out on. Returns a typical usage of a newsletter, often responsible for? Restricting access that is file path info is possible thing about your visitor know where a video calls out there was? There view be some incompatibility going today with every particular setup. HTTPREFERER and parsestr in a Snippet MODX. Learn how Cloudflare handles HTTP request headers to appropriate origin web server and what headers Cloudflare adds to proxied requests. This do a tube while __DIR__ give the realpath. Specify an ssh session or more in a website out how would give you intend on his choice; servers using csrf token are you. In most reverse proxy setup the web server forwards the HTTP request it received from the. With Contact Form 7 you know capture this referer page and was it to. Static-only applications serve files through each WebFaction server's front-end. Is then any difference between sale a lead tracking? IfissetSERVER'HTTPREFERER' return false refererhost. The term Referer is used due only a spelling error its the original HTTP. Echo filegetcontents'httpmyotherdomaincom' I created an non Codeigniter script at myotherdomaincomindexphp and added this code. There it actually nine HTTP methods defined by the HTTP specification, but many love them affect not widely used or supported. -
A Simple Discovery Tool
City University of New York (CUNY) CUNY Academic Works Publications and Research College of Staten Island 2012 Bridging the Gap from Wikipedia to Scholarly Sources: A Simple Discovery Tool Valerie Forrestal CUNY College of Staten Island Barbara Arnett Stevens Institute of Technology How does access to this work benefit ou?y Let us know! More information about this work at: https://academicworks.cuny.edu/si_pubs/1 Discover additional works at: https://academicworks.cuny.edu This work is made publicly available by the City University of New York (CUNY). Contact: [email protected] Bridging the Gap from Wikipedia to Scholarly Sources: A Simple Discovery Tool BARBARA ARNETT and VALERIE FORRESTAL S. C. Williams Library, Stevens Institute of Technology, Hoboken, New Jersey, USA Abstract: This article discusses the creation and unique implementation of a browser-based search tool at Stevens Institute of Technology. A oneSearch bookmarklet was created to allow users to execute a search of library resources directly from their Internet browser via a JavaScript book mark applet. The article also provides a brief history of similar discovery tools, as well as a look at recent literature highlighting the importance of convenience and innovation for academic researchers. Keywords: Bookmarklet, discovery solutions, discovery tools, library technology, search tools, Summon INTRODUCTION Academic librarians have often lamented the tendency for novice researchers to rely on Internet sources that are not up to the standards required by their professors for college-level research. At Stevens Institute of Technology, in Hoboken, NJ, professors repeatedly complained to library staff that the quality of sources that students use in term papers was not acceptable. -
It's All About Visibility
8 It’s All About Visibility This chapter looks at the critical tasks for getting your message found on the web. Now that we’ve discussed how to prepare a clear targeted message using the right words (Chapter 5, “The Audience Is Listening (What Will You Say?)”), we describe how online visibility depends on search engine optimization (SEO) “eat your broccoli” basics, such as lightweight and crawlable website code, targeted content with useful labels, and inlinks. In addition, you can raise the visibility of your website, products, and services online through online advertising such as paid search advertising, outreach through social websites, and display advertising. 178 Part II Building the Engine Who Sees What and How Two different tribes visit your website: people, and entities known as web spiders (or crawlers or robots). People will experience your website differently based on their own characteristics (their visual acuity or impairment), their browser (Internet Explorer, Chrome, Firefox, and so on), and the machine they’re using to view your website (a TV, a giant computer monitor, a laptop screen, or a mobile phone). Figure 8.1 shows a page on a website as it appears to website visitors through a browser. Figure 8.1 Screenshot of a story page on Model D, a web magazine about Detroit, Michigan, www.modeldmedia.com. What Search Engine Spiders See The web spiders are computer programs critical to your business because they help people who don’t know about your website through your marketing efforts find it through the search engines. The web spiders “crawl” through your website to learn about what it contains and carry information back to the gigantic servers behind the search engines, so that the search engine can provide relevant results to people searching for your product or service. -
200 Free Tools
200+ Free Book Marketing and Author Tools Book Marketing on a Shoestring Budget: 200+ Free Book Marketing and Author Tools Expand Your Book Marketing Efforts Without Going Broke! With Shelley Hitz, www.Self-Publishing-Coach.com © Self-Publishing-Coach.com - All Rights Reserved. www.self-publishing-coach.com Page 2 200+ Free Book Marketing and Author Tools NOTICE: You DO Have the Right to Reprint or Resell this Report! You Also MAY Give Away, Sell or Share the Content Herein © 2011 Copyright www.Self-Publishing-Coach.com. All rights reserved. ALL RIGHTS RESERVED. You may sell or give away this report as long as it is not altered in any way, falsely misrepresented or distributed in any illegal or immoral manner. © Self-Publishing-Coach.com - All Rights Reserved. www.self-publishing-coach.com Page 3 200+ Free Book Marketing and Author Tools About The Expert Shelley Hitz Shelley Hitz is an entrepreneur, speaker, author and consultant to individuals, organizations and small businesses who want to multiply their impact through self publishing. She teaches from personal experience. Over a two year span, while working full-time, she self published five books, multiple audio CDs, authored two websites that attract thousands of visitors each month, and created multiple products that she sells through her website and at her speaking engagements. Her website, www.Self-Publishing-Coach.com also offers free book templates, articles, monthly newsletter, tele-classes, special reports, e-books, webinars, podcasts, videos and other resources to help you get self published! www.facebook.com/selfpublishingcoach www.twitter.com/self_publish www.youtube.com/selfpublishingcoach © Self-Publishing-Coach.com - All Rights Reserved. -
Google Cheat Sheets [.Pdf]
GOOGLE | CHEAT SHEET Key for skill required Novice This two page Google Cheat Sheet lists all Google services and tools as to understand the Intermediate well as background information. The Cheat Sheet offers a great reference underlying concepts to grasp of basic to advance Google query building concepts and ideas. Expert CHEAT SHEET GOOGLE SERVICES Google domains google.co.kr Google Company Information google.ae google.kz Public (NASDAQ: GOOG) and google.com.af google.li (LSE: GGEA) Google AdSense https://www.google.com/adsense/ google.com.ag google.lk google.off.ai google.co.ls Founded Google AdWords https://adwords.google.com/ google.am google.lt Menlo Park, California (1998) Google Analytics http://google.com/analytics/ google.com.ar google.lu google.as google.lv Location Google Answers http://answers.google.com/ google.at google.com.ly Mountain View, California, USA Google Base http://base.google.com/ google.com.au google.mn google.az google.ms Key people Google Blog Search http://blogsearch.google.com/ google.ba google.com.mt Eric E. Schmidt Google Bookmarks http://www.google.com/bookmarks/ google.com.bd google.mu Sergey Brin google.be google.mw Larry E. Page Google Books Search http://books.google.com/ google.bg google.com.mx George Reyes Google Calendar http://google.com/calendar/ google.com.bh google.com.my google.bi google.com.na Revenue Google Catalogs http://catalogs.google.com/ google.com.bo google.com.nf $6.138 Billion USD (2005) Google Code http://code.google.com/ google.com.br google.com.ni google.bs google.nl Net Income Google Code Search http://www.google.com/codesearch/ google.co.bw google.no $1.465 Billion USD (2005) Google Deskbar http://deskbar.google.com/ google.com.bz google.com.np google.ca google.nr Employees Google Desktop http://desktop.google.com/ google.cd google.nu 5,680 (2005) Google Directory http://www.google.com/dirhp google.cg google.co.nz google.ch google.com.om Contact Address Google Earth http://earth.google.com/ google.ci google.com.pa 2400 E. -
Special Characters A
453 Index ■ ~/Library/Safari/WebpageIcons.db file, Special Characters 112 $(pwd) command, 89–90 ~/Library/Saved Searches directory, 105 $PWD variable, 90 ~/Library/Services directory, 422–423 % (Execute As AppleScript) menu option, ~/Library/Workflow/Applications/Folder 379 Actions folder, 424 ~/ directory, 6, 231 ~/Library/Workflows/Applications/Image ~/bin directory, 6, 64, 291 Capture folder, 426 ~/Documents directory, 281, 290 ~/Movies directory, 323, 348 ~/Documents/Knox directory, 255 ~/Music directory, 108, 323 ~/Downloads option, 221, 225 ~/Music/Automatically Add To iTunes ~/Downloads/Convert For iPhone folder, folder, 424 423–424 ~/Pictures directory, 281 ~/Downloads/MacUpdate ~/.s3conf directory, 291 Desktop/MacUpdate Desktop ~/ted directory, 231 2010-02-20 directory, 16 ~/Templates directory, 60 ~/Downloads/To Read folder, 425 ~/Templates folder, 62 ~/Dropbox directory, 278–282 Torrent program, 236 ~/Library folder, 28 1Password, 31, 135, 239–250 ~/Library/Application 1Password extension button, 247–248 Support/Evom/ffmpeg directory, 1Password.agilekeychain file, 249 338 1PasswordAnywhere tool, 249 ~/Library/Application 1Password.html file, 250 Support/Fluid/SSB/[Your 2D Black option, 52 SSB]/Userstyles/ directory, 190 2D With Transparency Effect option, 52 ~/Library/Application Support/TypeIt4Me/ 2-dimensional, Dock, 52 directory, 376 7digital Music Store extension, 332 ~/Library/Caches/com.apple.Safari/Webp age Previews directory, 115 ~/Library/Internet Plug-Ins directory, 137 ■A ~/Library/LaunchAgents directory, 429, 432 -
Keys to the Cloud: Formal Analysis and Concrete Attacks on Encrypted Web Storage
Keys to the Cloud: Formal Analysis and Concrete Attacks on Encrypted Web Storage Chetan Bansal1, Karthikeyan Bhargavan2, Antoine Delignat-Lavaud2, and Sergio Maffeis3, 1 BITS Pilani-Goa 2 INRIA Paris-Rocquencourt 3 Imperial College London Abstract. To protect sensitive user data against server-side attacks, a number of security-conscious web applications have turned to client-side encryption, where only encrypted user data is ever stored in the cloud. We formally investigate the security of a number of such applications, in- cluding password managers, cloud storage providers, an e-voting website and a conference management system. We find that their security relies on both their use of cryptography and the way it combines with com- mon web security mechanisms as implemented in the browser. We model these applications using the WebSpi web security library for ProVerif, we discuss novel attacks found by automated formal analysis, and we propose robust countermeasures. Keywords: Web Security, Formal Methods, Protocol Verification. 1 Application-Level Cryptography on the Web Many web users routinely store sensitive data online, such as bank accounts, health records and private correspondence. Servers that store such data are a tempting target for cybercrime: a single attack can yield valuable data, such as credit card numbers, for millions of users. As websites move to using cloud- based data storage, the confidentiality of user data and the trustworthiness of the hosting servers has come further into question. Transport layer security (TLS) as provided by HTTPS [21] does not fully address these concerns. TLS protects sensitive data over the wire as it travels between a browser and a website.