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Description of the Security and Quality Rollup for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, and 4.7.2 for Windows 8.1, RT 8.1, and Server 2012 R2 (KB 4344145)


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Summary

This update resolves an information disclosure vulnerability in Microsoft .NET Framework that could allow an attacker to access information in multi-tenant environments. The vulnerability is caused when .NET Framework is used in high-load/high-density network connections in which content from one stream can blend into another stream.

To exploit the vulnerability, an attacker who can access one tenant in a high-load/high-density environment could potentially trigger multi-tenanted data exposure from one customer to another.

This security update addresses the vulnerability by correcting the way that .NET Framework handles high-load/high-density network connections.

To learn more about this vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2018-8360.

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Important

  • All updates for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 require update 2919355 to be installed. We recommend that you install update 2919355 on your Windows RT 8.1-based, Windows 8.1-based, or Windows Server 2012 R2-based computer so that you receive updates in the future.
  • If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

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Additional information about this security update

For more information about this security update as it relates to Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2, see the following article in the Microsoft Knowledge Base:

4345592 Security and Quality Rollup updates for .NET Framework 3.5 SP1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, and 4.7.2 for Windows 8.1, RT 8.1 and Server 2012 R2 (KB 4345592)

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How to obtain and install the update

Method 1: Windows Update

This update is available through Windows Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to get security updates automatically, see Windows Update: FAQ.
 

Method 2: Windows Software Update Services (WSUS)

On your WSUS server, follow these steps:

  1. Click Start, click Administrative Tools, and then click Microsoft Windows Server Update Services 3.0.
  2. Expand ComputerName, and then click Action.
  3. Click Import Updates.
  4. WSUS opens a browser window in which you may be prompted to install an ActiveX control. You must install the ActiveX control to continue.
  5. After the ActiveX control is installed, you see the Microsoft Update Catalog screen. Type 4345592 in the Search box, and then click Search.
  6. Locate the .NET Framework packages that match the operating systems, languages, and processors in your environment. Click Add to add them to your basket.
  7. After you select all the packages that you require, click View Basket.
  8. To import the packages to your WSUS server, click Import.
  9. After the packages are imported, click Close to return to WSUS.

The updates are now available for installation through WSUS.

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Update deployment information

For deployment details for this security update, go to the following article in the Microsoft Knowledge Base:

20180814 Security update deployment information: August 14, 2018

Update removal information

Note We do not recommend that you remove any security update. To remove this update, use the Programs and Features item in Control Panel.

Update restart information

This update does not require a system restart after you apply it unless files that are being updated are locked or are being used.

Update replacement information

This update replaces previously released updates 4340558 and 4291497.

 

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File information

File hash
 
File name SHA1 hash SHA256 hash
Windows8.1-KB4344145-arm.msu 79E7BCA34766841838888F6D1CF14E1A7F2EECA2 E22A403C70B93809CB05BB1EE20E1815678C16606F5140DB3618587D82932774
Windows8.1-KB4344145-x64.msu 3A78DEA3BDA5A3C8F65BAEB2C27DECF4563D6359 3FBB3C24C72C791532D3916EDA8F8E5A0765E959E34118F96CABECC79BBB184A
Windows8.1-KB4344145-x86.msu 7D19DF08FB4D7CE730FE81081781E90CB72572FE 16253BAF2788050BD5DA987CC03EB6BD05A902239A417810E62B31998BB144FD

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How to obtain help and support for this security update

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Keywords: kb, atdownload, kbbug, kbexpertiseinter, kbfix, kblangall, kbmustloc, kbsecbulletin, kbsecreview, kbsecurity, kbsecvulnerability, kbsurveynew

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Article Info
Article ID : 4344145
Revision : 16
Created on : 8/10/2018
Published on : 8/14/2018
Exists online : False
Views : 99