CVE-2024-21409

.NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability

.NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability

Microsoft Security Advisory CVE-2024-21409 | .NET Elevation of Privilege Vulnerability

<a name="executive-summary"></a>Executive summary

Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 6.0, .NET 7.0 ,and .NET 8.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

A use-after-free vulnerability exists in WPF which may result in Elevation of Privilege when viewing untrusted documents. This is a Windows only vulnerability.

Announcement

Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/303

<a name="mitigation-factors"></a>Mitigation factors

This vulnerability affects only WPF-based applications.

<a name="affected-software"></a>Affected software

• Any .NET 6.0 application running on .NET 6.0.28 or earlier.
• Any .NET 7.0 application running on .NET 7.0.17 or earlier.
• Any .NET 8.0 application running on .NET 8.0.3 or earlier.

<a name="affected-packages"></a>Affected Packages

The vulnerability affects any Microsoft .NET Core project if it uses any of affected packages versions listed below

<a name=".NET 7"></a>.NET 6.0

Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- Microsoft.WindowsDesktop.App.Runtime.win-arm64 | < = 6.0.28 | 6.0.29 Microsoft.WindowsDesktop.App.Runtime.win-x64 | < = 6.0.28 | 6.0.29 Microsoft.WindowsDesktop.App.Runtime.win-x86 | < = 6.0.28 | 6.0.29

<a name=".NET 7"></a>.NET 7.0

Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- Microsoft.WindowsDesktop.App.Runtime.win-arm64 | <= 7.0.17 | 7.0.18 Microsoft.WindowsDesktop.App.Runtime.win-x64 | <= 7.0.17 | 7.0.18 Microsoft.WindowsDesktop.App.Runtime.win-x86 | <= 7.0.17 | 7.0.18

<a name=".NET 7"></a>.NET 8.0

Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- Microsoft.WindowsDesktop.App.Runtime.win-arm64 | <= 8.0.3 | 8.0.4 Microsoft.WindowsDesktop.App.Runtime.win-x64 | <= 8.0.3 | 8.0.4 Microsoft.WindowsDesktop.App.Runtime.win-x86 | <= 8.0.3 | 8.0.4

Advisory FAQ

<a name="how-affected"></a>How do I know if I am affected?

If you have a runtime or SDK with a version listed, or an affected package listed in affected software or affected packages, you're exposed to the vulnerability.

<a name="how-fix"></a>How do I fix the issue?

• To fix the issue please install the latest version of .NET 8.0 or .NET 7.0 or .NET 6.0. If you have installed one or more .NET SDKs through Visual Studio, Visual Studio will prompt you to update Visual Studio, which will also update your .NET SDKs.
• If you have .NET 6.0 or greater installed, you can list the versions you have installed by running the dotnet --info command. You will see output like the following;

.NET Core SDK (reflecting any global.json):


 Version:   8.0.204
 Commit:    8473146e7d

Runtime Environment:

 OS Name:    …

.NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability

.NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability