Security and Quality Rollup for .NET Framework 2.0 SP2 for Windows Server 2008 SP2 (KB 4040978)


Notice


This update is included in the Security and Quality Rollup that's dated November 14, 2017. This update was previously released as part of the Preview of Quality Rollup on October 17, 2017, the Security and Quality Rollup on October 10, 2017, and the Security and Quality Rollup on September 12, 2017.

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 by using the .NET Framework could take control of an affected system. The 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 with administrative user rights.

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

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

Important

  • 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.

Quality and reliability fixes


Area

Description of improvements

CLR1
  • Very rarely, an instance of ReaderWriterLock may hang in the process of releasing a lock. A new configuration variable is introduced to allow opting in to the fix. To fix this issue, set the COMPlus_ReaderWriterLock_UseFixedIdGeneration environment variable to 1 before you start the application.

Networking

  • A fix that was included in the May Monthly Security and Quality Rollup is changed to improve the performance of a network latency. This latency affects Active Directory lookups for the enhanced key usage (EKU) object identifiers (OIDs) function that's used in TLS (Transport Layer Security) and SSL (Secure Sockets Layer) certificates.

1 Common Language Runtime (CLR)

More information


The following article provides information about supported .NET Framework versions for this Windows version. This includes the month and year of release, update replacement information, and help and support information for the update.

4049019 November 2017 Security and Quality Rollup for .NET Framework 2.0 SP2, 4.5.2, and 4.6 updates for Windows Server 2008 SP2 (KB 4049019)

4042201 October 2017 Preview of Quality Rollup for .NET Framework 2.0 SP2, 4.5.2 and 4.6 updates for Windows Server 2008 SP2 (KB 4042201)

4043768 October 2017 Security and Quality Rollup for .NET Framework 2.0 SP2, 4.5.2, and 4.6 updates for Windows Server 2008 SP2 (KB 4043768)

4041086 September 2017 Security and Quality Rollup for .NET Framework 2.0 SP2, 4.5.2, and 4.6 updates for Windows Server 2008 SP2 (KB 4041086)

How to obtain and install the update


Method 1: Windows Update

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

Method 2: Microsoft Update Catalog

To get the stand-alone package for this update, go to the Microsoft Update Catalog.

Method 3: Windows Software Update Services (WSUS)

On your WSUS server, follow these steps:

  1. Select Start, select Administrative Tools, and then select Microsoft Windows Server Update Services 3.0.
  2. Expand ComputerName, and then select Action.
  3. Select Import Updates.
  4. WSUS opens a browser window, in which you may be prompted to install an ActiveX control. Install the ActiveX control to continue.
  5. After the control is installed, you see the Microsoft Update Catalog screen. Enter 4049019 in the Search box, and then select Search.
  6. Locate the .NET Framework packages that match the operating systems, languages, and processors in your environment. Select Add to add them to your basket.
  7. After you select all the packages that you need, select View Basket.
  8. Select Import to import the packages to your WSUS server.
  9. To return to WSUS, select Close after the packages have been imported.

The updates are now available for installation through WSUS.

Update deployment information

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

20170912 Security update deployment information: September 12, 2017

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 updates 4035039 and 4032116.

File information


How to obtain help and support for this security update


Applies to


This article applies to the following:
 
  • Microsoft .NET Framework 2.0 Service Pack 2 when used with:
    • Windows Server 2008 Service Pack 2