.NET Framework August 2023 Security and Quality Rollup Updates
[08/14/2023] revised to update known issues.
[08/13/2023] revised to add known issues.
Today, we are releasing the August 2023 Security and Quality Rollup Updates for .NET Framework.
Security
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.
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.
Quality and Reliability
This release contains the following quality and reliability improvements.
WPF1
- 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.
1 Windows Presentation Foundation (WPF)
Known issue:
| 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, apply the resolution from 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, apply the resolution from Windows 10, version 21H2 resolved issues. |
Getting the Update
The Security and Quality Rollup is available via Windows Update, Windows Server Update Services, and Microsoft Update Catalog.
Note: Customers that rely on Windows Update and Windows Server Update Services will automatically receive the .NET Framework version-specific updates. Advanced system administrators can also take use of the below direct Microsoft Update Catalog download links to .NET Framework-specific updates. Before applying these updates, please ensure that you carefully review the .NET Framework version applicability, to ensure that you only install updates on systems where they apply.
The following table is for Windows 10, version 1507 and Windows Server 2016 versions and newer operating systems.
| Product Version | Cumulative Update | |
|---|---|---|
| Windows 11, version 22H2 | ||
| .NET Framework 3.5, 4.8.1 | Catalog | 5028948 |
| Windows 11, version 21H2 | 5029650 | |
| .NET Framework 3.5, 4.8 | Catalog | 5028954 |
| .NET Framework 3.5, 4.8.1 | Catalog | 5028947 |
| Microsoft server operating system, version 22H2 | 5029646 | |
| .NET Framework 3.5, 4.8 | Catalog | 5028956 |
| Microsoft server operating system version 21H2 | 5029655 | |
| .NET Framework 3.5, 4.8 | Catalog | 5028956 |
| .NET Framework 3.5, 4.8.1 | Catalog | 5028950 |
| Windows 10, version 22H2 | 5029649 | |
| .NET Framework 3.5, 4.8 | Catalog | 5028951 |
| .NET Framework 3.5, 4.8.1 | Catalog | 5028946 |
| Windows 10, version 21H2 | 5029648 | |
| .NET Framework 3.5, 4.8 | Catalog | 5028951 |
| .NET Framework 3.5, 4.8.1 | Catalog | 5028946 |
| Windows 10 1809 (October 2018 Update) and Windows Server 2019 | 5029647 | |
| .NET Framework 3.5, 4.7.2 | Catalog | 5028960 |
| .NET Framework 3.5, 4.8 | Catalog | 5028953 |
| Windows 10 1607 (Anniversary Update) and Windows Server 2016 | ||
| .NET Framework 3.5, 4.6.2, 4.7, 4.7.1, 4.7.2 | Catalog | 5029242 |
| .NET Framework 4.8 | Catalog | 5028952 |
| Windows 10 1507 | ||
| .NET Framework 3.5, 4.6, 4.6.2 | Catalog | 5029259 |
The following table is for earlier Windows and Windows Server versions.
| Product Version | Security and Quality Rollup | Security Only Update | ||
|---|---|---|---|---|
| Windows Server 2012 R2 | 5029653 | 5029568 | ||
| .NET Framework 3.5 | Catalog | 5028970 | Catalog | 5028982 |
| .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 | Catalog | 5028962 | Catalog | 5028977 |
| .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 | Catalog | 5029312 | Catalog | 5028977 |
| .NET Framework 4.8 | Catalog | 5028957 | Catalog | 5028974 |
| Windows Server 2012 | 5029652 | 5029567 | ||
| .NET Framework 3.5 | Catalog | 5028967 | Catalog | 5028979 |
| .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 | Catalog | 5028961 | Catalog | 5028976 |
| .NET Framework 4.8 | Catalog | 5028955 | Catalog | 5028973 |
| Windows Embedded 7 and Windows Server 2008 R2 SP1 | 5029651 | 5029566 | ||
| .NET Framework 3.5.1 | Catalog | 5028969 | Catalog | 5028981 |
| .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2 | Catalog | 5028963 | Catalog | 5028978 |
| .NET Framework 4.8 | Catalog | 5028958 | Catalog | 5028975 |
| Windows Server 2008 | 5029654 | 5029569 | ||
| .NET Framework 2.0, 3.0 | Catalog | 5028968 | Catalog | 5028980 |
| .NET Framework 4.6.2 | Catalog | 5028963 | Catalog | 5028978 |
Previous Monthly Rollups
The last few .NET Framework Monthly updates are listed below for your convenience:
- .NET Framework July 2023 Cumulative Update Preview
- .NET Framework July 2023 Security and Quality Rollup Updates
- .NET Framework June 2023 Security and Quality Rollup
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6 comments
Issues with KB5028949 for W11 Canary folk
The problem with ClickOnce is NOT resolved (contrary to https://learn.microsoft.com/en-us/windows/release-health/resolved-issues-windows-10-22h2#3145msgdesc). Our users are still encountering Install dialog, eventhough the app is installed.
Can you clarify that the machine has, KB5028244, installed and is still having the issue. The resolution is when the Windows update referenced in https://learn.microsoft.com/en-us/windows/release-health/resolved-issues-windows-10-22h2#3145msgdesc is installed. If this updated does not resolve the issue, please reach out to Windows and CSS partners owning that update.
The problem is that KB5029331 is only an optional update, i.e. it doesn’t install automatically. After I installed it manually and restarted PC, it asked my again to install the app. But now, few days later it didn’t prompt for installation so I hope it solved the problem.
We’ve been using ClickOnce since 2013 to deploy our mission critical app (it’s secure message exchange app in healthcare, doctors receive e.g. lab results). During the years we faced many obstacles:
1) ClickOnce sometimes fails to start app, see e.g.: https://stackoverflow.com/questions/1166233/clickonce-error-value-does-not-fall-within-the-expected-range
2) reputation of code signing certificate cannot be transferred to new certificate for the same company
3) bug KB5028244 – user clicks don’t install and then calls support. Since we have thousands of users, this caused us a great pain.
So my main question is: why this critical update (KB5029331) doesn’t install automatically? Will we have to connect to every affected doctor and install the update manually?
We develop applications that use ClickOnce deployments – our customers are reporting that after the update is installed, they receive 500 errors when going to the ClickOnce URL – they removed the update and the ClickOnce works – we need an immediate response to the issues our customers are encountering
They installed 5028960 on Windows Server 2019
Hello Ron,
This is first reported issue with Windows Server 2019. Can you please share more details on errors you are getting in the email .