January 9, 2024-KB5033917 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Microsoft server operating system, version 23H2

2024-03-2207:00:00

Microsoft

support.microsoft.com

microsoft server os

.net framework

security update

reliability improvement

version 23h2

cve-2023-36042

cve-2024-0056

cve-2024-0057

cve-2024-21312

remote code execution

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

8.8 High

AI Score

Confidence

High

0.009 Low

EPSS

Percentile

83.1%

JSON

January 9, 2024-KB5033917 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Microsoft server operating system, version 23H2

Release Date:
January 9, 2024 Version: ** .NET Framework 3.5 and 4.8.1**

The January 9, 2024 update for Microsoft server operating system, version 23H2 includes security and cumulative reliability improvements in .NET Framework 3.5 and 4.8.1. 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-2023-36042 – .NET Framework Denial of Service Vulnerability
This security update addresses a security feature bypass vulnerability detailed in CVE-2023-36042. CVE-2024-0056 – .NET Framework Security Feature Bypass Vulnerability
This security update addresses a security feature bypass vulnerability detailed in CVE-2024-0056 . CVE-2024-0057 – .NET Framework Security Feature Vulnerability
This security update addresses a elevation of privilege vulnerability detailed in CVE-2024-0057. CVE-2024-21312 – .NET Framework Denial of Service Vulnerability
This security update addresses a denial of service vulnerability detailed in CVE-2024-21312 . .NET Framework Remote Code Execution Vulnerability
This security update addresses a remote code execution vulnerability to HTTP .NET remoting server channel chain. Quality and Reliability ImprovementsThere are no new Quality and Reliability Improvements in this update.

Known issues in this update

Microsoft is not currently aware of any issues in this update.

How to get this update

Install this updateRelease 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 update will automatically sync with WSUS if you configure as follows: Product: Microsoft server operating system, version 23H2Classification: Security Updates 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 4.8.1 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.