Watching Netflix on PC has always been a problematic affair. Yes, you can watch it in any browser but, you won’t get the top-notch user experience of a native Netflix app. Also, during browser viewing, you can face multiple issues like Netflix stopped working and no sound output. That’s why we are here with this article to address all the issues regarding Netflix for Mac & Windows. This user guide will help you to overcome all the barriers and guide you to install the official Netflix app for Windows as well as help you to view Netflix from your Mac PC seamlessly.
It supports fast, cost-effective delivery of high-quality video to all major browsers running on the Mac OS or Windows. Microsoft Silverlight for Mac. Microsoft Silverlight 4.0. Have to reinstall it on a regular basis to be able to watch Netflix movie downloads as sound gets chopped up or image freezes. Download Silverlight Mac Chrome. Silverlight Mac El Capitan Download Installer Click on the button below to start downloading Mac OS X El Capitan 10.11.1 for mac OS X. We are here to provide to clean and fast download for Mac OS X El Capitan 10.11 dmg.
So without wasting another minute, let’s check out our guide now. Make sure you adhere to all the steps which are dedicated to your type of PC. Here you go!
Contents
- 1 Is Netflix App for Mac & Windows Available?
- 1.1 How to Watch Netflix on Mac?
- 1.3 How to Fix Netflix Not Working on Mac?
- 1.4 Netflix for Mac Troubleshooters
- 1.5 How to Watch Netflix on Windows?
- 1.8 Netflix Viewing in HDR
Is Netflix App for Mac & Windows Available?
The short answer is NO for Mac Users. Netflix is still reluctant to make a standalone app for Mac. A couple of years ago, when Netflix came out with an official app for Windows 10, Mac users got their hopes up of having a Netflix app on the macOS platform sooner or later. Since then, Netflix officials have cited a couple of times that building a MacOS specific Netflix viewing platform is in their to-do list currently.
However, it’s not an impossible task to view the awesome shows of Netflix in your Macbook. You might not get the well-optimized and enhanced experience of a native Netflix app but, with the help of internet browsers, you can still access your Netflix from your Macbook.
How to Watch Netflix on Mac?
You can access Netflix from your Mac computer with the help of Mac’s indigenous browser Safari. Follow these three simple steps to watch Netflix in your Mac PC
Step 1: Open Safari and go to netflix.com
Step 2: Press Sign In option if you already have a running Netflix account
Step 3: Put your Netflix email id and password and click on Sign In
However, to run Netflix smoothly on macOS, there are some minimum requirement criteria your PC must possess.
System Requirements
To view Netflix, you need to use either HTML5 player or Silverlight plug-ins. Both of them require different specifications to run effortlessly. Here are the complete PC requirements for different scenarios.
HTML5: Your PC needs to have MacOS 10.10 or later version to run Netflix. But if you wish to stream at 1080P, your PC should run on macOS 10.10.3 or later. And, to view at 4K, you need to have Intel 7th gen core CPU as well as a 4K capable display. On top of that, an HDCP 2.2 capable connection is also required.
Silverlight 4: Here, you need to have MacOS 10.4.11 or later, Safari 3-11 or later, and Intel Core 2 Duo 1.83 GHz or higher processors with at least 512 GB RAM.
Silverlight 5: This advanced version of Silverlight requires a more capable MacOS than its predecessor. It needs MacOS 10.5.7 or later, Safari 4-11 or later, and Intel Core 2 Duo 1.83 GHz or higher processors with at least 512 GB RAM.
Now you may ask how to install the Silverlight plug-in in your Macbook. Here’s how.
Silverlight Installation Guide
Follow the below process to get Silverlight on your Mac.
Step 1: Open Netflix from your PC and select a title to play
Step 2: When a dialogue box containing Silverlight plug-in appears, press Install Now
Step 3: Go to Safari’s download page and double-click on the recently downloaded Silverlight.dmg file
Step 4: Right-click on Silverlight.pkg file and press Save File on the pop-up box.
Step 5: A prompt quoting “Silverlight.pkg is not from the Mac App Store. Are you sure you want to open it?” will appear. Press Open on it
Step 6: Follow the upcoming prompts to complete the installation process
As you can see, streaming Netflix for Mac & Windows isn’t a tough process to replicate. You just need to follow some easy steps, and you’ll be able to enjoy the breathtaking video content of Netflix.
However, we’ve seen users complaining about their Netflix experience in Safari. This is mainly due to some common issues. Netflix, through browsers, are not as reliable as an official Netflix app.
How to Fix Netflix Not Working on Mac?
There’s no other thing more frustrating than finding Netflix having trouble loading in your Macbook. Netflix streaming problems on Mac are widespread. We’ve prepared a complete troubleshooting guide for all of the issues you might face during Netflix Mac access. But before that, Let’s take a look at the most common issues you might encounter on your Macbook as well as on your Windows PC.
Common Issues in Netflix for Mac & Windows
These following issues are quite common and can be seen in both Mac and Windows browsers while accessing Netflix.
- Cache problems
- Plugin failure issue
- Unexpected error message pop-up
- Black screen with no sign of player controls
- Monitor output issue
- Mysterious n8010, n8151, and 2015 error codes
- Issues caused by adware
If you’re a pre-2011 Mac owner and you updated the browser to Safari 12, then you might face a plug-in issue. The 2018 update, Safari 12, doesn’t support Silverline plug-ins, which pre 2011 Macs need to play Netflix.
These are the issues you might face. Now let’s move on to the solution part.
Netflix for Mac Troubleshooters
We are going to explain the top three fixes for Netflix viewing issues in Mac. If you apply these tricks, your viewing experience will greatly improve.
Use HTML5 to View Netflix Contents
Silverlight plugins have lots of issues hampering user experience. The most famous one occurs for Macs made before 2011. To eliminate those issues, you just need to shift to HTML5 Player from Silverlight.
Netflix introduced the HTML5 player in 2014. The best thing about the HTML5 player is, it can play content in 1080P.
To ensure you’re viewing Netflix with the help of an HTML5 player, ensure the following.
Newer Mac: Upgrade your PC to the latest version of macOS. If your PC is running above Mac 10.10 Yosemite or above, then Safari automatically streams in HTML5.
Older Mac: If you’re using an older Macbook, you have to use Google Chrome to access HTML5 that, too, after forcing Chrome to play on HTML5. Open Netflix in Chrome and navigate to Netflix Playback Setting. Then select “Prefer HTML5 instead of Silverlight” option.
Clear Browser Cookies for Netflix
When your browser cookies get corrupted or outdated, you might face a couple of problems streaming Netflix. You need to clear cookies in this scenario. Thanks to Netflix, this is pretty easy to fix, however.
Step 1: Open netflix.com/clearcookies from your browser
Step 2: Netflix automatically clears out all the existing cookies
Step 3: Log in to your Netflix account to continue streaming
Use Netflix Streaming Devices
If you’re frequently having issues while opening Netflix in your Mac PC and want to get rid of these issues once and for all, then you should buy a streaming device that supports the Netflix app. Streaming devices have the ability to stream Netflix without a glitch.
Nowadays, we have multiple attractive options in streaming devices. Buy one of your choices and plug it into the USB port of your Mac, and that it. Not only these modern-day devices are much more efficient at accessing Netflix, but they can also stream other popular video streaming platforms like Amazon Prime, Disney+, ESPN, HBO Now, and Hulu.
We hope now you got it right how to download and run Netflix for Mac & Windows. Now let’s move onto helping our viewer with Windows PC.
How to Watch Netflix on Windows?
Unlike Mac, you have a proper app to access Netflix in Windows. This official app is only available in Windows 8 or later versions. If you’re using Windows 7 or any earlier version of Windows, you can stream Netflix from a browser, just like you do on a Mac. Setting up the Netflix app in your Windows PC is a fairly simple process. Just follow our guide thoroughly, and you will be good to go.
Netflix for Windows App Set-Up Procedures
Netflix is available in Microsoft Store for Windows 8, 8.1, and 10 users. Before accessing it in the Microsoft store, make sure you have signed into the store with your valid Microsoft login details. Then follow these steps.
Step 1: From the Start Menu, go to Microsoft store
Step 2: Navigate to the Search option
Step 3: Type Netflix on Search Box and press Search
Step 4: Select Netflix app from the result page
Step 5: Press Get, situated on the right side of your screen
Step 6: After the installation process completes, go to Search Menu and search for Netflix
Step 7: After finding it, double click on the app
Step 8: Go to Sign In page and enter your Netflix credentials carefully
Step 9: Upon entering your login details, press Sign In
This whole process of getting Netflix is as convenient as getting an app on your smartphone. It doesn’t require any application file download and later runs it as administrator. You just need to press the Install button, and the app automatically gets installed.
Although the task of streaming Netflix isn’t as easy for older Microsoft OS users. They can’t get their hands onto the Netflix app. Here is a brief discussion about streaming Netflix in old Windows OS.
Netflix for Windows 7 or Earlier
As the Microsoft store doesn’t exist in Windows 7 or earlier Windows versions, you can not get the official Netflix app. You need to use your browsers to access Netflix. Here’s the whole process in simple steps.
Step 1: Open a Browser (preferably Google Chrome) on your PC
Step 2: Go to address bar and put www.netflix.com before pressing Enter
Step 3: After Netflix opens, Sign In with your credentials to stream Netflix on your PC
This is as simple as it sounds. However, your experience on a web browser will not be as great as the Netflix app. Still, many people binge-watch their favorite shows on a browser. So, this is a workable option to consider if you can get upgraded to Windows 8 or later.
To have an effortless viewing, you should use the HTML5 player. Otherwise, you might face some issues. HTML5 is supported on Chrome V68 or later, and Opera V55 or later in Windows 7. However, you can only stream up to 720P in your browser.
Netflix Viewing in Ultra HD
Netflix can be viewed in Ultra HD mode from your Windows PC if your PC can match with the following list of criteria.
- Windows 10 OS with latest updates installed
- Netflix app or Microsoft Edge installed
- A 4K 60Hz display and an HDCP 2.2 connection (only for desktops)
- A 7th gen Intel core CPU or newer with matching NVIDIA GPU
- A Netflix monthly plan that offers Ultra HD viewing
- A steady network connection with at least 25 megabits per second speed
- Quality of streaming set to High or Auto
If you can meet these requirements, you can watch Ultra HD contents on your Windows PC.
Netflix Viewing in HDR
HDR streaming is also available on Netflix. Whether you can access it or not depends on your Graphics Processing Unit (GPU) and your PC’s configuration. Here’s what you need.
For Intel GPU:
- Windows 10 Creator update (v 1709)
- At least 7th gen Intel CPU
- 22.XX.XX series Graphics Driver, Version 4708 or better
For Nvidia GPU:
- Windows 10 Creator update (v 1709)
- 1080, 1070, 1060, and 1050 cards with a minimum of 3GB Video RAM
- 387.68 (23.21.13.8768) Graphics Driver or higher
These are the requirements for the HDR playback of Netflix on your PC. Also, your device should be enabled for HDR viewing by the manufacturing company, and it should support PlayReady 3.0 or higher.
Final Thoughts
There goes all the detailed discussion regarding Netflix for Mac & Windows. Keeping in mind about its growing popularity, we sincerely hope that Netflix will listen to its consumers and soon develop a MacOS specific app. Till then, Mac users have only two choices left. Watch it on Safari or change your Mac PC with the latest Windows PC that supports the Netflix app.
If you have any questions in your mind, comment it down in the comment box. We wholeheartedly thank you for staying with us this far into the article. Keep following us for more informative blogs coming shortly.
-->Microsoft silverlight for mac free download - Microsoft Silverlight, Microsoft Silverlight, Microsoft Silverlight Software Development Kit Update 5/21/2007 for Mac, and many more programs. The file that was tested for Microsoft Silverlight was Silverlight.exe. These tests apply to Microsoft Silverlight 5.1.50918.0 which is the latest version last time we checked. According to our test on Jan 25, 2019, this program.is. a clean download and virus-free; it should be safe to run.
Vulnerability in Silverlight Could Allow Security Feature Bypass (2932677)
Published: March 11, 2014
Version: 1.0
- Our built-in antivirus scanned this Mac download and rated it as 100% safe. Silverlight is a cross-browser, cross-platform plug-in for delivering the next generation of Microsoft.NET-based media experiences and rich interactive applications for the Web.
- The Microsoft Silverlight 5 for Windows download version 5.1.40620.0 is available. It includes all security fixes in MS15-044 and is functionally identical to Microsoft Silverlight 5 for Windows version 5.1.40416.0. This download is an upgrade for earlier versions of Silverlight.
General Information
Executive Summary
This security update resolves a privately reported vulnerability in Microsoft Silverlight. The vulnerability could allow security feature bypass if an attacker hosts a website that contains specially crafted Silverlight content that is designed to exploit the vulnerability, and then convinces a user to view the website. In all cases, however, an attacker would have no way to force users to visit a website. Instead, an attacker would have to convince users to visit a website, typically by getting them to click a link in an email message or in an Instant Messenger message that takes them to the attacker's website. It could also be possible to display specially crafted web content by using banner advertisements or by using other methods to deliver web content to affected systems.
This security update is rated Important for Microsoft Silverlight 5 and Microsoft Silverlight 5 Developer Runtime when installed on Mac and all supported releases of Microsoft Windows. For more information, see the subsection, Affected and Non-Affected Software, in this section.
The security update upgrades previous versions of Silverlight to Silverlight version 5.1.30214.0, which is the first version of Silverlight 5 that is not affected by the vulnerability. The update addresses the vulnerability by modifying functionality to maintain the integrity of DEP (Data Execution Prevention) and Address Space Layout Randomization (ASLR) in Silverlight. For more information about the vulnerability, see the Frequently Asked Questions (FAQ) subsection under the next section, Vulnerability Information.
Recommendation. Most customers have automatic updating enabled and will not need to take any action because this security update will be downloaded and installed automatically. Customers who have not enabled automatic updating need to check for updates and install this update manually. For information about specific configuration options in automatic updating, see Microsoft Knowledge Base Article 294871.
For administrators and enterprise installations, or end users who want to install this security update manually, Microsoft recommends that customers apply the update at the earliest using update management software, or by checking for updates using the Microsoft Update service.
See also the section, Detection and Deployment Tools and Guidance, later in this bulletin.
Silverlight Mac Download Netflix
Knowledge Base Article
- Knowledge Base Article: 2932677
- File information: Yes
- SHA1/SHA2 hashes: Yes
- Known Issues: None
Affected and Non-Affected Software
The following software has been tested to determine which versions or editions are affected. Other versions or editions are either past their support life cycle or are not affected. To determine the support life cycle for your software version or edition, see Microsoft Support Lifecycle.
Affected Software
| Operating System | Maximum Security Impact | Aggregate Severity Rating | Updates Replaced |
|---|---|---|---|
| **Microsoft Silverlight 5** | |||
| [Microsoft Silverlight 5](https://www.microsoft.com/download/details.aspx?familyid=6995908d-7948-416d-a0a0-253c0fe90537) when installed on Mac (2932677) | Security Feature Bypass | Important | 2890788 in [MS13-087](http://go.microsoft.com/fwlink/?linkid=324590) |
| [Microsoft Silverlight 5 Developer Runtime](https://www.microsoft.com/download/details.aspx?familyid=6995908d-7948-416d-a0a0-253c0fe90537) when installed on Mac (2932677) | Security Feature Bypass | Important | 2890788 in [MS13-087](http://go.microsoft.com/fwlink/?linkid=324590) |
| [Microsoft Silverlight 5](https://www.microsoft.com/download/details.aspx?familyid=6995908d-7948-416d-a0a0-253c0fe90537) when installed on all supported releases of Microsoft Windows clients (2932677) | Security Feature Bypass | Important | 2890788 in [MS13-087](http://go.microsoft.com/fwlink/?linkid=324590) |
| [Microsoft Silverlight 5 Developer Runtime](https://www.microsoft.com/download/details.aspx?familyid=6995908d-7948-416d-a0a0-253c0fe90537) when installed on all supported releases of Microsoft Windows clients (2932677) | Security Feature Bypass | Important | 2890788 in [MS13-087](http://go.microsoft.com/fwlink/?linkid=324590) |
| [Microsoft Silverlight 5](https://www.microsoft.com/download/details.aspx?familyid=6995908d-7948-416d-a0a0-253c0fe90537) when installed on all supported releases of Microsoft Windows servers (2932677) | Security Feature Bypass | Important | 2890788 in [MS13-087](http://go.microsoft.com/fwlink/?linkid=324590) |
| [Microsoft Silverlight 5 Developer Runtime](https://www.microsoft.com/download/details.aspx?familyid=6995908d-7948-416d-a0a0-253c0fe90537) when installed on all supported releases of Microsoft Windows servers (2932677) | Security Feature Bypass | Important | 2890788 in [MS13-087](http://go.microsoft.com/fwlink/?linkid=324590) |
Which web browsers support Microsoft Silverlight applications ?
In order to run Microsoft Silverlight applications, most web browsers, including Microsoft Internet Explorer, require Microsoft Silverlight to be installed and the corresponding plug-in to be enabled. For more information about Microsoft Silverlight, see the official site, Microsoft Silverlight. Please refer to the documentation of your browser to learn more about how to disable or remove plug-ins.
What versions of Microsoft Silverlight 5 are affected by the vulnerability ?
Microsoft Silverlight build 5.1.30214.0, which was the current build of Microsoft Silverlight as of when this bulletin was first released, addresses the vulnerability and is not affected. Builds of Microsoft Silverlight previous to 5.1.30214.0 are affected.
How do I know which version and build of Microsoft Silverlight is currently installed on my system?
If Microsoft Silverlight is already installed on your computer, you can visit the Get Microsoft Silverlight page, which will indicate which version and build of Microsoft Silverlight is currently installed on your system. Alternatively, you can use the Manage Add-Ons feature of current versions of Microsoft Internet Explorer to determine the version and build information that is currently installed on your system.
You can also manually check the version number of sllauncher.exe located in the '%ProgramFiles%Microsoft Silverlight' directory (on x86 Microsoft Windows systems) or in the '%ProgramFiles(x86)%Microsoft Silverlight' directory (on x64 Microsoft Windows systems).
In addition, on Microsoft Windows, the version and build information of the currently installed version of Microsoft Silverlight can be found in the registry at [HKEY_LOCAL_MACHINESOFTWAREMicrosoftSilverlight]:Version on x86 Microsoft Windows systems, or [HKEY_LOCAL_MACHINESOFTWAREWow6432NodeMicrosoftSilverlight]:Version on x64 Microsoft Windows systems.
On Apple Mac OS, the version and build information of the currently installed version of Microsoft Silverlight can be found as follows:
- Open the Finder
- Select the system drive and go to the folder Internet Plug-ins - Library
- Right-click the file Silverlight.Plugin (if your mouse has only one button, press the Ctrl key while clicking on the file) to bring up the context menu, then click Show Package Contents
- Inside the contents folder, locate the file info.plist and open it with an editor. It will contain an entry like this, which shows you the version number:SilverlightVersion5.1.30214.0
The version installed with this security update for Microsoft Silverlight 5 is 5.1.30214.0. If your Microsoft Silverlight 5 version number is higher than or equal to this version number, your system is not vulnerable.
How do I upgrade my version of Microsoft Silverlight?
The Microsoft Silverlight auto-update feature helps make sure that your Microsoft Silverlight installation is kept up to date with the latest version of Microsoft Silverlight, Microsoft Silverlight functionality, and security features. For more information about the Microsoft Silverlight auto-update feature, see the Microsoft Silverlight Updater. Windows users who have disabled the Microsoft Silverlight auto-update feature can enroll in Microsoft Update to obtain the latest version of Microsoft Silverlight, or can download the latest version of Microsoft Silverlight manually using the download link in the Affected Software table in the earlier section, Affected and Non-Affected Software. For information about deploying Microsoft Silverlight in an enterprise environment, see the Silverlight Enterprise Deployment Guide.
Will this update upgrade my version of Silverlight?
The 2932677 update upgrades previous versions of Silverlight to Silverlight version 5.1.30214.0. Microsoft recommends upgrading to be protected against the vulnerability described in this bulletin.
Where can I find additional information about the Silverlight product lifecycle ?
For lifecycle information specific to Silverlight, see the Microsoft Silverlight Support Lifecycle Policy.
I am using an older release of the software discussed in this security bulletin. What should I do?
The affected software listed in this bulletin has been tested to determine which releases are affected. Other releases are past their support life cycle. For more information about the product lifecycle, see the Microsoft Support Lifecycle website.
It should be a priority for customers who have older releases of the software to migrate to supported releases to prevent potential exposure to vulnerabilities. To determine the support lifecycle for your software release, see Select a Product for Lifecycle Information. For more information about service packs for these software releases, see Service Pack Lifecycle Support Policy.
Customers who require custom support for older software must contact their Microsoft account team representative, their Technical Account Manager, or the appropriate Microsoft partner representative for custom support options. Customers without an Alliance, Premier, or Authorized Contract can contact their local Microsoft sales office. For contact information, see the Microsoft Worldwide Information website, select the country in the Contact Information list, and then click Go to see a list of telephone numbers. When you call, ask to speak with the local Premier Support sales manager. For more information, see the Microsoft Support Lifecycle Policy FAQ.
Severity Ratings and Vulnerability Identifiers
The following severity ratings assume the potential maximum impact of the vulnerability. For information regarding the likelihood, within 30 days of this security bulletin's release, of the exploitability of the vulnerability in relation to its severity rating and security impact, please see the Exploitability Index in the March bulletin summary. For more information, see Microsoft Exploitability Index.
| Vulnerability Severity Rating and Maximum Security Impact by Affected Software | ||
|---|---|---|
| **Affected Software** | **Silverlight DEP/ASLR Bypass Vulnerability - CVE-2014-0319** | **Aggregate Severity Rating** |
| **Microsoft Silverlight 5** | ||
| Microsoft Silverlight 5 when installed on Mac | **Important** Security Feature Bypass | **Important** |
| Microsoft Silverlight 5 Developer Runtime when installed on Mac | **Important** Security Feature Bypass | **Important** |
| Microsoft Silverlight 5 when installed on all supported releases of Microsoft Windows clients | **Important** Security Feature Bypass | **Important** |
| Microsoft Silverlight 5 Developer Runtime when installed on all supported releases of Microsoft Windows clients | **Important** Security Feature Bypass | **Important** |
| Microsoft Silverlight 5 when installed on all supported releases of Microsoft Windows servers | **Important** Security Feature Bypass | **Important** |
| Microsoft Silverlight 5 Developer Runtime when installed on all supported releases of Microsoft Windows servers | **Important** Security Feature Bypass | **Important** |
Silverlight DEP/ASLR Bypass Vulnerability - CVE-2014-0319
Microsoft Silverlight Update Mac Virus Windows 10
A security feature bypass vulnerability exists in Silverlight due to improper implementation of Data Execution Protection (DEP) and Address Space Layout Randomization (ASLR). The vulnerability could allow an attacker to bypass the DEP/ASLR security feature, most likely during or in the course of exploiting a remote code execution vulnerability.
To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2014-0319.
Mitigating Factors
Mitigation refers to a setting, common configuration, or general best-practice, existing in a default state, that could reduce the severity of exploitation of a vulnerability. The following mitigating factors may be helpful in your situation:
- In a web browsing attack scenario, an attacker could host a website that contains a webpage that is used to exploit this vulnerability. In addition, compromised websites and websites that accept or host user-provided content or advertisements could contain specially crafted content that could exploit this vulnerability. In all cases, however, an attacker would have no way to force users to visit these websites. Instead, an attacker would have to convince users to visit the website, typically by getting them to click a link in an email message or Instant Messenger message that takes users to the attacker's website.
- An attacker who successfully exploited this vulnerability in conjunction with another vulnerability, such as a remote code execution vulnerability, could gain the same user rights as the current user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
- By default, Internet Explorer on Windows Server 2003, Windows Server 2008, Windows Server 2008 R2, and Windows Server 2012 runs in a restricted mode that is known as Enhanced Security Configuration. This mode mitigates this vulnerability. See the FAQ section of this security update for more information about Internet Explorer Enhanced Security Configuration.
Workarounds
Workaround refers to a setting or configuration change that does not correct the underlying vulnerability but would help block known attack vectors before you apply the update. Quick style microsoft word mac. Microsoft has tested the following workarounds and states in the discussion whether a workaround reduces functionality:
Temporarily prevent Microsoft Silverlight from running in Internet Explorer
Temporarily disabling Silverlight in Internet Explorer can help protect against this vulnerability. To disable Silverlight in Internet Explorer, follow these steps:
- In Internet Explorer, click the Tools menu and then click Internet Options.
- Click the Programs tab and then click Manage add-ons.
- In the Toolbars and Extensions list, find 'Microsoft Silverlight,' and then click Disable.
Temporarily prevent Microsoft Silverlight from running in Mozilla Firefox
Temporarily disabling Silverlight in Mozilla Firefox can help protect against this vulnerability. To disable Silverlight in Firefox, follow these steps:
- In Firefox, click the Tools menu and then click Addons.
- In the Addons window, click the Plugins tab.
- Find the Silverlight plugin and then click Disable.
Temporarily prevent Microsoft Silverlight from running in Google Chrome
Temporarily disabling Silverlight in Google Chrome can help protect against this vulnerability. To disable Silverlight in Chrome, follow these steps:
- In Chrome's address bar, type about:plugins.
- In the page that appears, find the Silverlight plugin and disable it.
FAQ
What is the scope of the vulnerability?
This is a security feature bypass vulnerability.
What causes the vulnerability?
The vulnerability is caused when Microsoft Silverlight incorrectly implements DEP/ASLR security features, allowing an attacker to more reliably predict the memory offsets of specific instructions in a given call stack.
What is Microsoft Silverlight?
Microsoft Silverlight is a cross-browser, cross-platform implementation of the Microsoft .NET Framework for building media experiences and rich interactive applications for the web. For more information, see the official site of Microsoft Silverlight.
What is ASLR?
Address Space Layout Randomization (ASLR) moves executable images into random locations when a system boots, which helps prevent an attacker from leveraging data at predictable locations. For a component to support ASLR, all components that it loads must also support ASLR. For example, if A.exe consumes B.dll and C.dll, all three must support ASLR. By default, Windows Vista, Windows Server 2008, Windows 7, Windows Server 2008 R2, Windows 8, Windows 8.1, Windows RT, Windows RT 8.1, Windows Server 2012, and Windows Server 2012 R2 will randomize system DLLs and EXEs, but DLLs and EXEs created by Independent Software Vendors (ISVs) must opt in to support ASLR using the /DYNAMICBASE linker option.
ASLR also randomizes heap and stack memory:
- When an application creates a heap in Windows Vista, Windows Server 2008, Windows 7, Windows Server 2008 R2, Windows 8, Windows 8.1, Windows RT, Windows RT 8.1, Windows Server 2012, and Windows Server 2012 R2, the heap manager will create that heap at a random location to help reduce the chance that an attempt to exploit a heap-based buffer overrun succeeds. Heap randomization is enabled by default for all applications running on Windows Vista and later.
- When a thread starts in a process linked with /DYNAMICBASE, Windows Vista, Windows Server 2008, Windows 7, Windows Server 2008 R2, Windows 8, Windows 8.1, Windows RT, Windows RT 8.1, Windows Server 2012, and Windows Server 2012 R2 move the thread's stack to a random location to help reduce the chance that a stack-based buffer overrun exploit will succeed.
What is DEP?
DEP (Data Execution Prevention) is a hardware and software solution for preventing the execution of code from pages of memory that are not explicitly marked as executable. Windows XP SP2, Windows Server 2003 SP1, and later operating systems check if the CPU supports enforcement of the ‘no execute’ or ‘execute disable bit’ for a page of memory.
- Before Windows XP SP2, an exploit ('code') could execute from memory allocated without the execute memory protection constant set. For example, if a page of memory were allocated using the VirtualAlloc() function specifying PAGE_READWRITE, it was still possible to execute code from that page of memory. Starting with Windows XP SP2 and Windows Server 2003 SP1, if the CPU supports the execute disable (XD – Intel CPUs) or no execute (NX – AMD CPUs) bits, any attempts to execute code from a page of memory with a (for example) PAGE_READWRITE memory protection will generate a STATUS_ACCESS_VIOLATION (0xC0000005) access violation exception. For more information on how hardware enforced DEP works please refer to Memory Protection Technologies.
- DEP is 'always on' for 64bit processes on 64bit versions of Windows and it cannot be disabled. The Windows DEP policy can be managed on both a system-wide and per-process basis and both approaches will be discussed below. This blog post will apply specifically to 32bit processes running on either a 32bit or 64bit version of Windows.
What might an attacker use the vulnerability to do?
In a web-browsing attack scenario, an attacker who successfully exploited this vulnerability could bypass the DEP/ASLR security feature, which protects users from a broad class of vulnerabilities. The security feature bypass by itself does not allow arbitrary code execution. However, an attacker could use this DEP/ASLR bypass vulnerability in conjunction with another vulnerability, such as a remote code execution vulnerability that could take advantage of the DEP/ASLR bypass to run arbitrary code.
How could an attacker exploit the vulnerability?
In a web-based attack scenario, an attacker could host a website with specially crafted Silverlight content to attempt to exploit this vulnerability. In addition, compromised websites and websites that accept or host user-provided content could contain specially crafted content that could exploit this vulnerability. An attacker would have no way to force users to visit a specially crafted website. Instead, an attacker would have to convince users to take action. For example, an attacker could trick users into clicking a link that takes them to the attacker's site.
When a user visits a website that contains malicious Silverlight content using a web browser, such as Internet Explorer, a DEP/ASLR bypass could be achieved.
An attacker could tie this security feature bypass vulnerability to an additional vulnerability, most likely a remote code execution vulnerability. The additional vulnerability could leverage the security feature bypass to effect exploitation. For example, a remote code execution vulnerability that is blocked by DEP/ASLR could be exploited after a successful DEP/ASLR bypass.
Microsoft Silverlight Update Windows 7
I am running Internet Explorer for Windows Server 2003, Windows Server 2008, Windows Server 2008 R2, or Windows Server 2012. Does this mitigate this vulnerability?
Yes. By default, Internet Explorer on Windows Server 2003, Windows Server 2008, Windows Server 2008 R2, and Windows Server 2012 runs in a restricted mode that is known as Enhanced Security Configuration. Enhanced Security Configuration is a group of preconfigured settings in Internet Explorer that can reduce the likelihood of a user or administrator downloading and running specially crafted web content on a server. This is a mitigating factor for websites that you have not added to the Internet Explorer Trusted sites zone.
Does EMET help mitigate attacks that could attempt to exploit this vulnerability?
Yes. The Enhanced Mitigation Experience Toolkit (EMET) enables users to manage security mitigation technologies that help make it more difficult for attackers to exploit vulnerabilities in a given piece of software. EMET helps to mitigate these vulnerabilities in Silverlight on systems where EMET is installed and configured to work with Internet Explorer.
For more information about EMET, see The Enhanced Mitigation Experience Toolkit.
What systems are primarily at risk from the vulnerability?
Workstations and terminal servers are primarily at risk. Servers could be at more risk if administrators allow users to log on to servers and to run programs. However, best practices strongly discourage allowing this.
What does the update do?
The update addresses the vulnerability by modifying functionality to maintain the integrity of DEP/ASLR in Silverlight.
When this security bulletin was issued, had this vulnerability been publicly disclosed?
No. Microsoft received information about this vulnerability through coordinated vulnerability disclosure.
When this security bulletin was issued, had Microsoft received any reports that this vulnerability was being exploited?
No. Microsoft had not received any information to indicate that this vulnerability had been publicly used to attack customers when this security bulletin was originally issued.
Detection and Deployment Tools and Guidance
Several resources are available to help administrators deploy security updates.
- Microsoft Baseline Security Analyzer (MBSA) lets administrators scan local and remote systems for missing security updates and common security misconfigurations.
- Windows Server Update Services (WSUS), Systems Management Server (SMS), and System Center Configuration Manager help administrators distribute security updates.
- The Update Compatibility Evaluator components included with Application Compatibility Toolkit aid in streamlining the testing and validation of Windows updates against installed applications.
For information about these and other tools that are available, see Security Tools for IT Pros.
Note Windows detection and deployment tools do not apply to Mac systems. However, Mac users can use the Microsoft Silverlight auto-update feature, which helps ensure that systems are up-to-date with the latest version of Microsoft Silverlight, Microsoft Silverlight functionality, and security features. For more information about the Microsoft Silverlight auto-update feature, see Microsoft Silverlight Updater.
Security Update Deployment
Silverlight 5 for Mac (all editions)
Reference Table
The following table contains the security update information for this software.
| Security update file names | For Microsoft Silverlight 5 when installed on Mac: Silverlight.dmg |
| For Microsoft Silverlight 5 Developer Runtime when installed on Mac: silverlight_developer.dmg | |
| Restart requirement | This update does not require a restart. |
| Removal information | Open the Finder, select the system drive, go to the folder Internet Plug-ins - Library, and delete the file Silverlight.Plugin. (Note that the update cannot be removed without removing the Silverlight plug-in.) |
| File information | See Microsoft Knowledge Base Article 2932677 |
| Installation verification | See the Update FAQ section in this bulletin that addresses the question, 'How do I know which version and build of Microsoft Silverlight is currently installed?' |
| Security update file names | For Microsoft Silverlight 5 when installed on all supported 32-bit releases of Microsoft Windows: silverlight.exe |
| For Microsoft Silverlight 5 Developer Runtime when installed on all supported 32-bit releases of Microsoft Windows: silverlight_developer.exe | |
| For Microsoft Silverlight 5 when installed on all supported 64-bit releases of Microsoft Windows: silverlight_x64.exe | |
| For Microsoft Silverlight 5 Developer Runtime when installed on all supported 64-bit releases of Microsoft Windows: silverlight_developer_x64.exe | |
| Installation switches | See the Silverlight Enterprise Deployment Guide |
| Restart requirement | This update does not require a restart. |
| Removal information | Use Add or Remove Programs item in Control Panel. (Note that the update cannot be removed without removing Silverlight.) |
| File information | See Microsoft Knowledge Base Article 2932677 |
| Registry key verification | For 32-bit installations of Microsoft Silverlight 5: HKEY_LOCAL_MACHINESOFTWAREMicrosoftSilverlight 'Version' = '5.1.30214.0' |
| For 64-bit installations of Microsoft Silverlight 5: HKEY_LOCAL_MACHINESOFTWAREWow6432NodeMicrosoftSilverlight 'Version' = '5.1.30214.0' and HKEY_LOCAL_MACHINESOFTWAREMicrosoftSilverlight 'Version' = '5.1.30214.0' |
Acknowledgments
Microsoft thanks the following for working with us to help protect customers:
- NSFOCUS Information Technology Co., Ltd. for reporting the Silverlight DEP/ASLR Bypass Vulnerability (CVE-2014-0319)
Other Information
Microsoft Active Protections Program (MAPP)
To improve security protections for customers, Microsoft provides vulnerability information to major security software providers in advance of each monthly security update release. Security software providers can then use this vulnerability information to provide updated protections to customers via their security software or devices, such as antivirus, network-based intrusion detection systems, or host-based intrusion prevention systems. To determine whether active protections are available from security software providers, please go to the active protections websites provided by program partners, listed in Microsoft Active Protections Program (MAPP) Partners.
Support
How to obtain help and support for this security update
Download Silverlight For Mac
- Help installing updates: Support for Microsoft Update
- Security solutions for IT professionals: TechNet Security Troubleshooting and Support
- Help protect your computer that is running Windows from viruses and malware: Virus Solution and Security Center
- Local support according to your country: International Support
Disclaimer
The information provided in the Microsoft Knowledge Base is provided 'as is' without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
Revisions
Hulu
- V1.0 (March 11, 2014): Bulletin published.
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