Revised on August 13th, 2023 to add a known issue.
Release Date:
August 8, 2023
Version:
.NET Framework 3.5 and 4.8
The August 8, 2023 update for Windows 10 Version 21H2 and Windows 10 Version 22H2 includes security and cumulative reliability improvements in .NET Framework 3.5 and 4.8. We recommend that you apply this update as part of your regular maintenance routines. Before you install this update, see the Prerequisites and Restart requirement sections.
Summary
Security Improvements
CVE-2023-36899 - .NET Framework Remote Code Execution Vulnerability
This security update addresses a vulnerability in applications on IIS using their parent application’s Application Pool which can lead to privilege escalation or other security bypasses. For more information see CVE 2023-36899.
CVE-2023-36873 - .NET Framework Spoofing Vulnerability
This security update addresses a vulnerability where unauthenticated remote attacker can sign ClickOnce deployments without a valid code signing certificate. For more information see CVE-2023-36873.
Quality and Reliability Improvements
|
WPF |
- Addresses an issue where XPS documents using LinkTarget aren't rendering properly. |
|
Networking |
- Addresses an issue where using proxy with continuous load may lead to memory leak resulting in high memory usage, or potentially OutOfMemoryException. |
1Windows Presentation Foundation (WPF)
Additional information about this update
The following articles contain additional information about this update as it relates to individual product versions.
Known issues in this update
|
Product Version |
Symptom |
Resolution |
|
Windows 11, version 22H2 |
After installing windows KB5028244, applications which were deployed using ClickOnce might begin to prompt for installation even when the ClickOnce apps are already installed and marked as “trusted”. |
To mitigate the issue, see Windows 10, version 22H2 resolved issues. |
|
Windows 11, version 21H2 |
After installing windows KB5029244, applications which were deployed using ClickOnce might begin to prompt for installation even when the ClickOnce apps are already installed and marked as “trusted”. |
To mitigate the issue, see Windows 10, version 21H2 resolved issues. |
How to get this update
Install 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 individual .NET Framework product update will be installed, as applicable, by applying the operating system update. For more information about operating system updates see additional information about this update section. |
File information
For a list of the files that are provided in this update, download the file information for cumulative update.
Prerequisites
To apply this update, you must have .NET Framework 3.5 or 4.8 installed.
Restart requirement
You must restart the computer after you apply this update if any affected files are being used. We recommend that you exit all .NET Framework-based applications before you apply 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
