.NET March 2022 Updates – .NET 6.0.3, .NET 5.0.15 and, .NET Core 3.1.23

Rahul Bhandari (MSFT)

Today, we are releasing the .NET March 2022 Updates. These updates contain reliability and security improvements. See the individual release notes for details on updated packages.

You can download 6.0.3, 5.0.15 and, 3.1.23 versions for Windows, macOS, and Linux, for x86, x64, Arm32, and Arm64.

Improvements

Security

CVE-2020-8927: .NET Remote Code Execution Vulnerability

Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 5.0 and .NET Core 3.1. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

A vulnerability exists in .NET 5.0 and .NET Core 3.1 where a buffer overflow exists in the Brotli library versions prior to 1.0.8.

CVE-2022-24464: .NET Denial of Service Vulnerability

Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 6.0, .NET 5.0, and .NET CORE 3.1. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

Microsoft is aware of a Denial of Service vulnerability, which exists in .NET 6.0, .NET 5.0, and .NET CORE 3.1 when parsing certain types of http form requests.

CVE-2022-24512: .NET Remote Code Execution Vulnerability

Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 6.0, .NET 5.0, and .NET Core 3.1. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

A Remote Code Execution vulnerability exists in .NET 6.0, .NET 5.0, and .NET Core 3.1 where a stack buffer overrun occurs in .NET Double Parse routine.

Visual Studio

See release notes for Visual Studio compatibility for .NET 6.0, .NET 5.0 and, .NET Core 3.1.

6 comments

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  • Mike M

    1) When will .NET Runtime 6.0.3 be available on Azure App Services (Windows & Linux)?
    2) Can .NET App (deployed as “Framework-Dependent”) that uses NuGet packages (eg: Microsoft.EntityFrameworkCore.SqlServer version 6.0.3) run on Azure App Service that does not have latest version of .NET Runtime 6.0.3?

    • Christopher Henry

      1) I am also curious about when this will be released on Azure App Services (Windows).
      2) I can confirm it does work in the Azure environment, but we have an issue using Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation within the Azure environment with the 6.0.3 versions. We are hoping when Azure gets the latest runtimes, this will go away as it does not cause any issue locally.

    • Andreas S

      We just changed to self-contained deployement, because we saw that linux app services are still on .net6.0.0 and windows app services on .net6.0.1. Just add –runtime linux-x64 –self-contained true to your dotnet publish commands.

  • Dean Jackson

    For the .Net framework cumulative updates, they keep getting released as “Preview” (and they’re listed as Preview in Windows updates), and yet Windows Update auto-installs them. If it’s truly a preview and a there will be a later update coming that’s the real version, Windows update should not auto-install it. If it’s the real version and no later one is coming, then don’t call it a Preview.