February 14, 2023-Security Only Update for .NET Framework 2.0, 3.0, 4.6.2 for Windows Server 2008 SP2 (KB5022786)

Applies to: Microsoft .NET Framework 2.0 Microsoft .NET Framework 3.0 Microsoft .NET Framework 4.6.2

**Note:**Revised on Jun 20, 2023 to add resolution to known issue.

REMINDER Windows Embedded 7 Standard and Windows Server 2008 R2 SP1 have reached the end of mainstream support and are now in extended security update (ESU) support. Starting in July 2020, there will no longer be optional, non-security releases (known as “C” releases) for this operating system. Operating systems in extended support have only cumulative monthly security updates (known as the “B” or Update Tuesday release). Verify that you have installed the required updates listed in theHow to get this update section before installing this update. Customers who have purchased the Extended Security Update (ESU) for on-premises versions of these operating systems must follow the procedures in KB4522133 to continue receiving security updates after extended support ends on January 14, 2020. For more information on ESU and which editions are supported, see KB4497181. For more information, see the ESU blog.

REMINDER All updates for .NET Framework 4.7.2, 4.7.1, 4.7, 4.6.2, 4.6.1, and 4.6 require that the d3dcompiler_47.dll update is installed. We recommend that you install the included d3dcompiler_47.dll update before you apply this update. For more information about the d3dcompiler_47.dll, see KB 4019990. 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.

Summary

CVE-2023-21808 - .NET Framework Remote Code Execution Vulnerability
This security update addresses a vulnerability in the MSDIA SDK where an untrusted pointer dereference can cause memory corruption, leading to a crash or remove code execution. For more information please see CVE-2023-21808. CVE-2023-21722 - .NET Framework Denial of Service Vulnerability
This security update addresses a vulnerability where the Visual Studio WMI Setup Provider Installer can be used by a low level, local attacker to corrupt local files that SYSTEM can writ to, leading to a potential denial of service. For more information please see CVE-2023-21722.

Known issues in this update

Additional information about this update

The following articles contain additional information about this update as it relates to individual product versions.

• 5022529 Description of the Security Only Update for .NET Framework 2.0, 3.0 for Windows Server 2008 SP2 (KB5022529)
• 5022526 Description of the Security Only Update for .NET Framework 4.6.2 for Windows Embedded 7 Standard and Windows Server 2008 R2 SP1 and Windows Server 2008 SP2 (KB5022526)

How to get this update

How to obtain help and support for this update

• Help for installing updates: Windows Update FAQ
• Protect yourself online and at home: Windows Security support
• Local support according to your country: International Support