Release Date:June 13, 2023

Version: .NET Framework 3.5 and 4.8

Note:

Revised Jun 15, 2023 to correct the wording of the known issue to X.509 certificate

Revised on Jun 20, 2023 to fix the link for CVE-2023-32030

Summary

This article describes the Cumulative Update for 3.5 and 4.8 for Azure Stack HCI, version 21H2.

Security Improvements

CVE-2023-24897 - .NET Framework Remote Code Execution Vulnerability This security update addresses a vulnerability in the MSDIA SDK where corrupted PDBs can cause heap overflow, leading to a crash or remove code execution. For more information see CVE 2023-24897.

CVE-2023-29326 - .NET Framework Remote Code Execution Vulnerability This security update addresses a vulnerability in WPF where the BAML offers other ways to instantiate types that leads to an elevation of privilege. For more information see CVE-2023-29326.

CVE-2023-24895 - .NET Framework Remote Code Execution Vulnerability This security update addresses a vulnerability in the WPF XAML parser where an unsandboxed parser can lead to remote code execution. For more information see CVE-2023-24895.

CVE-2023-24936 - .NET Framework Elevation of Privilege Vulnerability This security update addresses a vulnerability in bypass restrictions when deserializing a DataSet or DataTable from XML, leading to an elevation of privilege. For more information see CVE-2023-24936.

CVE-2023-29331 - .NET Framework Denial of Service Vulnerability This security update addresses a vulnerability where the AIA fetching process for client certificates can lead to denial of service. For more information see CVE 2023-29331.

CVE-2023-32030 - .NET Framework Denial of Service Vulnerability This security update addresses a vulnerability where X509Certificate2 file handling can lead to denial of service. For more information see CVE 2023-32030.

Quality and Reliability Improvements

For a list of improvements that were released with this update, please see the article links in the Additional Information section of this article.

Known issues in this update

Symptom

This update may impact how .NET Framework runtime imports X.509 certificates. For more information about this issue, see KB5025823

Workaround

To mitigate this issue, see KB5025823.

Additional information about this update

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

  • 5027127 Description of the Cumulative Update for .NET Framework 3.5 and 4.8 for Azure Stack HCI, version 21H2 (KB5027127)

How to get this update

Release Channel

Available

Next Step

Windows Update and Microsoft Update

Yes

None. This update will be downloaded and installed automatically from Windows Update.

Windows Update for Business

Yes

None. This update will be downloaded and installed automatically from Windows Update.

Microsoft Update Catalog

Yes

To get the standalone package for this update, go to the Microsoft Update Catalog website.

Windows Server Update Services (WSUS)

Yes

This operating system update will offer, as applicable, and individual .NET Framework product updates will be installed. For more information about individual .NET Framework product updates see additional information about this update section.

This update will automatically sync with WSUS if you configure as follows:

Product: Azure Stack HCI, version 21H2

Classification: Security Updates

How to obtain help and support for this update

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