Notice: This website is an unofficial Microsoft Knowledge Base (hereinafter KB) archive and is intended to provide a reliable access to deleted content from Microsoft KB. All KB articles are owned by Microsoft Corporation. Read full disclaimer for more details.

Security Only update for the .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, and 4.7 updates for Windows 8.1, Windows RT 8.1 and Windows Server 2012 R2: September 12, 2017


View products that this article applies to.

Summary

This security update resolves a vulnerability in the Microsoft .NET Framework that could allow remote code execution when Microsoft .NET Framework processes untrusted input. An attacker who successfully exploits this vulnerability in software by using the .NET Framework could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts that have full user rights. Users whose accounts are configured to have fewer user rights on the system could be less affected than users who operate by using administrative user rights.

To exploit the vulnerability, an attacker must first convince the user to open a malicious document or application.

This security update addresses the vulnerability by correcting how the .NET Framework validates untrusted input. To learn more about this vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2017-8759.

↑ Back to the top


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.

Update replacement information

This update replaces updates 4019114, 4035038, 4014983, and 4032115.

↑ Back to the top


Additional information about this security update

The following articles contain additional information about this security update as it relates to individual product versions.
 
  • 4040956 Description of the Security Only update for the .NET Framework 4.6, 4.6.1, 4.6.2, and 4.7 for Windows 8.1, Windows RT 8.1 and Windows Server 2012 R2: September 12, 2017
  • 4040958 Description of the Security Only update for the .NET Framework 4.5.2 for Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2: September 12, 2017
  • 4040967 Description of the Security Only update for the .NET Framework 3.5 for Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2: September 12, 2017

↑ Back to the top


How to obtain help and support for this security update

↑ Back to the top


Applies to

This article applies to the following:

 

  • Microsoft .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, and 4.7 when used with:
    • Windows Server 2012 R2
    • Windows RT 8.1
    • Windows 8.1
 

↑ Back to the top


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

↑ Back to the top

Article Info
Article ID : 4041092
Revision : 13
Created on : 9/12/2017
Published on : 9/12/2017
Exists online : False
Views : 201