Applies to:
Microsoft .NET Framework 4.8
REMINDER
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As a reminder to advanced IT administrators, updates to .NET Framework 3.5 for Windows Server 2012 R2 should only be applied on systems where .NET Framework 3.5 is present and enabled. Customers who attempt to pre-install updates to .NET Framework 3.5 to offline images that do not contain the .NET Framework 3.5 product enabled will expose these systems to failures to enable .NET Framework 3.5 after the systems are online. For more extensive information about deploying .NET Framework 3.5, see Microsoft .NET Framework 3.5 Deployment Considerations.
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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.
The August 8, 2023 update for Windows Server 2012 R2 includes security improvements in .NET Framework 4.8. We recommend that you apply this update as part of your regular maintenance routines. Verify that you have installed the required updates listed in the How to get this update section before installing this update.
Summary
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.
Additional information about this update
The following articles contain additional information about this update as it relates to individual product versions.
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5029568 Description of the Security Only Update for .NET Framework 3.5, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Server 2012 R2 (KB5029568)
Known issues in this update
Microsoft is not currently aware of any issues in this update.
How to get this update
Before installing this update
Prerequisite:
To apply this update, you must have .NET Framework 4.8 installed.
Install this update
|
Release Channel |
Available |
Next Step |
|
Windows Update and Microsoft Update |
No |
See the other options below. |
|
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. |
Restart requirement
You may need to 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.
Update deployment information
For deployment details for this security update, go to the following article in the Microsoft Knowledge Base:
20230808 Security update deployment information: August 8, 2023
File Information
File hash information
|
File name |
SHA256 hash |
|
Windows8.1-KB5028974-x64.msu |
EDC1984BF1B5A16CAFF6871CD6C9FEE679D780382E56F1285D8BB440F7F460A5 |
|
File name |
File version |
File size |
Date |
Time |
Platform |
SP requirement |
Service branch |
|
Aspnet_perf.dll |
4.8.4654.0 |
42,888 |
04-Jul-2023 |
02:26 |
x64 |
SPN |
AMD64_NETFX4-ASP |
|
Aspnet_state_perf.h |
Not applicable |
318 |
04-Jul-2023 |
00:39 |
Not applicable |
SPN |
AMD64_NETFX4-ASP |
|
Aspnet_state_perf.ini |
Not applicable |
42,996 |
04-Jul-2023 |
02:27 |
Not applicable |
SPN |
AMD64_NETFX4-ASP |
|
Aspnet_wp.exe |
4.8.4654.0 |
46,480 |
04-Jul-2023 |
02:26 |
x64 |
SPN |
AMD64_NETFX4-ASP |
|
Dfdll.dll |
4.8.4654.0 |
215,944 |
04-Jul-2023 |
02:26 |
x64 |
None |
Not applicable |
|
System.deployment.dll |
4.8.4654.0 |
1,596,304 |
04-Jul-2023 |
02:35 |
x86 |
None |
Not applicable |
|
System.web.applicationservices.dll |
4.8.4654.0 |
65,904 |
04-Jul-2023 |
02:35 |
x86 |
None |
Not applicable |
|
System.web.extensions.dll |
4.8.4654.0 |
1,844,592 |
04-Jul-2023 |
02:35 |
x86 |
None |
Not applicable |
|
System.windows.forms.dll |
4.8.4654.0 |
5,922,672 |
04-Jul-2023 |
02:35 |
x86 |
None |
Not applicable |
|
Webengine4.dll |
4.8.4654.0 |
676,232 |
04-Jul-2023 |
02:26 |
x64 |
None |
Not applicable |
|
Webengine.dll |
4.8.4654.0 |
22,408 |
04-Jul-2023 |
02:26 |
x64 |
None |
Not applicable |
|
System.web.dll |
4.8.4654.0 |
5,399,448 |
04-Jul-2023 |
02:26 |
x64 |
None |
Not applicable |
|
System.deployment.dll |
4.8.4654.0 |
1,596,304 |
04-Jul-2023 |
02:35 |
x86 |
None |
Not applicable |
|
System.web.applicationservices.dll |
4.8.4654.0 |
65,904 |
04-Jul-2023 |
02:35 |
x86 |
None |
Not applicable |
|
System.web.extensions.dll |
4.8.4654.0 |
1,844,592 |
04-Jul-2023 |
02:35 |
x86 |
None |
Not applicable |
|
System.windows.forms.dll |
4.8.4654.0 |
5,922,672 |
04-Jul-2023 |
02:35 |
x86 |
None |
Not applicable |
|
Aspnet_perf.dll |
4.8.4654.0 |
37,256 |
04-Jul-2023 |
02:27 |
x86 |
SPN |
X86_NETFX4-ASP |
|
Aspnet_state_perf.h |
Not applicable |
318 |
04-Jul-2023 |
00:42 |
Not applicable |
SPN |
X86_NETFX4-ASP |
|
Aspnet_state_perf.ini |
Not applicable |
42,996 |
04-Jul-2023 |
02:29 |
Not applicable |
SPN |
X86_NETFX4-ASP |
|
Aspnet_wp.exe |
4.8.4654.0 |
40,888 |
04-Jul-2023 |
02:27 |
x86 |
SPN |
X86_NETFX4-ASP |
|
Dfdll.dll |
4.8.4654.0 |
179,080 |
04-Jul-2023 |
02:27 |
x86 |
None |
Not applicable |
|
System.web.extensions.dll |
4.8.4654.0 |
1,844,592 |
04-Jul-2023 |
02:35 |
x86 |
None |
Not applicable |
|
Webengine4.dll |
4.8.4654.0 |
565,656 |
04-Jul-2023 |
02:27 |
x86 |
None |
Not applicable |
|
Webengine.dll |
4.8.4654.0 |
20,376 |
04-Jul-2023 |
02:27 |
x86 |
None |
Not applicable |
|
System.web.dll |
4.8.4654.0 |
5,412,280 |
04-Jul-2023 |
02:35 |
x86 |
None |
Not applicable |
How to obtain help and support for this update
-
Help for installing updates: Windows Update FAQ
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Protect yourself online and at home: Windows Security support
-
Local support according to your country: International Support
