.NET and Visual Studio Information Disclosure Vulnerability
.NET and Visual Studio Denial of Service Vulnerability
Information Disclosure: MD.SqlClient(MDS) & System.data.SQLClient (SDS) - client library supports establishing non-ssl TCP connection
Description 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 address this vulnerability.
A security feature bypass vulnerability exists when Microsoft .NET Framework-based applications use X.509 chain building APIs but do not completely validate the X.509 certificate due to a logic flaw. An attacker could present an arbitrary untrusted certificate with malformed signatures, triggering a bug in the framework. The framework will correctly report that X.509 chain building failed, but it will return an incorrect reason code for the failure. Applications which utilize this reason code to make their own chain building trust decisions may inadvertently treat this scenario as a successful chain build. This could allow an adversary to subvert the app's typical authentication logic.
Affected software NuGet & NuGet Packages - Any NuGet.exe, NuGet.CommandLine, NuGet.Packaging 6.8.0 version or earlier. - Any NuGet.exe, NuGet.CommandLine, NuGet.Packaging 6.7.0 version or earlier. - Any NuGet.exe, NuGet.CommandLine, NuGet.Packaging 6.6.1 version or earlier. - Any NuGet.exe, NuGet.CommandLine, NuGet.Packaging 6.4.2 version or earlier. - Any NuGet.exe, NuGet.CommandLine, NuGet.Packaging 6.3.3 version or earlier. - Any NuGet.exe, NuGet.CommandLine, NuGet.Packaging 6.0.5 version or earlier. - Any NuGet.exe, NuGet.CommandLine, NuGet.Packaging 5.11.5 version or earlier.
.NET SDK(s) - Any .NET SDK 6.0.126 or earlier, or 6.0.418 or earlier. - Any .NET SDK 7.0.115 or earlier, or 7.0.312 or earlier, or 7.0.405 or earlier. - Any .NET SDK 8.0.101 or earlier. Patches To fix the issue, please install the latest version of .NET 6.0, .NET 7.0 or .NET 8.0 and NuGet (NuGet.exe, NuGet.CommandLine, NuGet. Packaging versions). 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're using NuGet.exe 6.8.0 or lower, you should download and install 6.8.1 from https://dist.nuget.org/win-x86-commandline/v6.8.1/nuget.exe. - If you're using NuGet.exe 6.7.0 or lower, you should download and install 6.7.1 from https://dist.nuget.org/win-x86-commandline/v6.7.1/nuget.exe. - If you're using NuGet.exe 6.6.1 or lower, you should download and install 6.6.2 from https://dist.nuget.org/win-x86-commandline/v6.6.2/nuget.exe. - If you're using NuGet.exe 6.4.2 or lower, you should download and install 6.4.3 from https://dist.nuget.org/win-x86-commandline/v6.4.3/nuget.exe. - If you're using NuGet.exe 6.3.3 or lower, you should download and install 6.3.4 from https://dist.nuget.org/win-x86-commandline/v6.3.4/nuget.exe. - If you're using NuGet.exe 6.0.5 or lower, you should download and install 6.0.6 from https://dist.nuget.org/win-x86-commandline/v6.0.6/nuget.exe. - If you're using NuGet.exe 5.11.5 or lower, you should download and install 5.11.6 from https://dist.nuget.org/win-x86-commandline/v5.11.6/nuget.exe. - If you're using .NET 8.0, you should download and install .NET 8.0.102 SDK (for Visual Studio 2022 v17.8) from https://dotnet.microsoft.com/download/dotnet-core/8.0 . - If you're using .NET 7.0, you should download and install SDK 7.0.116 (for Visual Studio 2022 v17.4), or SDK 7.0.313 (for Visual Studio 2022 v17.6), or 7.0.406 (for Visual Studio 2022 v17.7) from https://dotnet.microsoft.com/download/dotnet-core/7.0 . - If you're using .NET 6.0, you should download and install SDK 6.0.127 or SDK 6.0.419 (for Visual Studio 2022 v17.3) from https://dotnet.microsoft.com/download/dotnet-core/6.0 .
Other details Announcement for this issue can be found at https://github.com/NuGet/Announcements/issues/71
MSRC details for this can be found at CVE-2024-0057 - Security Update Guide - Microsoft - NET, .NET Framework, and Visual Studio Security Feature Bypass Vulnerability
Microsoft QUIC Denial of Service Vulnerability
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.NET and Visual Studio Remote Code Execution Vulnerability
Microsoft Security Advisory CVE-2024-30046 | .NET Denial of Service Vulnerability
<a name="executive-summary"></a>Executive summary
Microsoft is releasing this security advisory to provide information about a vulnerability in .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 Vulnerability exist in Microsoft.AspNetCore.Server.Kestrel.Core.dll where a dead-lock can occur resulting in Denial of Service.
Discussion
Discussion for this issue can be found at https://github.com/dotnet/aspnetcore/issues/55714
<a name="mitigation-factors"></a>Mitigation factors
Microsoft has not identified any mitigating factors for this vulnerability.
<a name="affected-software"></a>Affected software
Any .NET 7.0 application running on .NET 7.0.18 or earlier. Any .NET 8.0 application running on .NET 8.0.4 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="ASP.NET 7"></a>ASP.NET 7
Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- Microsoft.AspNetCore.App.Runtime.linux-arm | <= 7.0.18 | 7.0.19 Microsoft.AspNetCore.App.Runtime.linux-arm64 | <= 7.0.18 | 7.0.19 Microsoft.AspNetCore.App.Runtime.linux-musl-arm | <= 7.0.18 | 7.0.19 Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 | <= 7.0.18 | 7.0.19 Microsoft.AspNetCore.App.Runtime.linux-musl-x64 | <= 7.0.18 | 7.0.19 Microsoft.AspNetCore.App.Runtime.linux-x64 | <= 7.0.18 | 7.0.19 Microsoft.AspNetCore.App.Runtime.osx-arm64 | <= 7.0.18 | 7.0.19 Microsoft.AspNetCore.App.Runtime.osx-x64 | <= 7.0.18 | 7.0.19 Microsoft.AspNetCore.App.Runtime.win-arm | <= 7.0.18 | 7.0.19 Microsoft.AspNetCore.App.Runtime.win-arm64 | <= 7.0.18 | 7.0.19 Microsoft.AspNetCore.App.Runtime.win-x64 | <= 7.0.18 | 7.0.19 Microsoft.AspNetCore.App.Runtime.win-x86 | <= 7.0.18 | 7.0.19
<a name="ASP.NET 8"></a>ASP.NET 8 Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- Microsoft.AspNetCore.App.Runtime.linux-arm | <= 8.0.4 | 8.0.5 Microsoft.AspNetCore.App.Runtime.linux-arm64 | <= 8.0.4 | 8.0.5 Microsoft.AspNetCore.App.Runtime.linux-musl-arm | <= 8.0.4 | 8.0.5 Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 | <= 8.0.4 | 8.0.5 Microsoft.AspNetCore.App.Runtime.linux-musl-x64 | <= 8.0.4 | 8.0.5 Microsoft.AspNetCore.App.Runtime.linux-x64 | <= 8.0.4 | 8.0.5 Microsoft.AspNetCore.App.Runtime.osx-arm64 | <= 8.0.4 | 8.0.5 Microsoft.AspNetCore.App.Runtime.osx-x64 | <= 8.0.4 | 8.0.5 Microsoft.AspNetCore.App.Runtime.win-arm | <= 8.0.4 | 8.0.5 Microsoft.AspNetCore.App.Runtime.win-arm64 | <= 8.0.4 | 8.0.5 Microsoft.AspNetCore.App.Runtime.win-x64 | <= 8.0.4 | 8.0.5 Microsoft.AspNetCore.App.Runtime.win-x86 | <= 8.0.4 | 8.0.5
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: 8.0.200 Commit: 8473146e7d
Runtime Environment:
OS Name: Windows OS Version: 10.0.18363 OS Platform: Windows RID: win10-x64 Base Path: C:\Program Files\dotnet\sdk\6.0.300\
Host (useful for support):
Version: 8.0.3 Commit: 8473146e7d
.NET Core SDKs installed:
8.0.200 [C:\Program Files\dotnet\sdk]
.NET Core runtimes installed:
Microsoft.AspAspNetCore.App 8.0.3 [C:\Program Files\dotnet\shared\Microsoft.AspAspNetCore.App] Microsoft.AspNetCore.App 8.0.3 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.WindowsDesktop.App 8.0.3 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
To install additional .NET Core runtimes or SDKs: https://aka.ms/dotnet-download
If you're using .NET 8.0, you should download and install .NET 8.0.5 Runtime or .NET 8.0.105 SDK (for Visual Studio 2022 v17.8) from https://dotnet.microsoft.com/download/dotnet-core/8.0. If you're using .NET 7.0, you should download and install Runtime 7.0.19 or SDK 7.0.119 (for Visual Studio 2022 v17.4) from https://dotnet.microsoft.com/download/dotnet-core/7.0.
.NET 7.0 and, .NET 8.0 updates are also available from Microsoft Update. To access this either type "Check for updates" in your Windows search, or open Settings, choose Update & Security and then click Check for Updates.
Once you have installed the updated runtime or SDK, restart your apps for the update to take effect.
Additionally, if you've deployed self-contained applications targeting any of the impacted versions, these applications are also vulnerable and must be recompiled and redeployed.
Other Information
Reporting Security Issues
If you have found a potential security issue in .NET 8.0 or .NET 7.0 or .NET 6.0, please email details to secure@microsoft.com. Reports may qualify for the Microsoft .NET Core & .NET 5 Bounty. Details of the Microsoft .NET Bounty Program including terms and conditions are at <https://aka.ms/corebounty>.
Support
You can ask questions about this issue on GitHub in the .NET GitHub organization. The main repos are located at https://github.com/dotnet/runtime and https://github.com/dotnet/aspnet/. The Announcements repo (https://github.com/dotnet/Announcements) will contain this bulletin as an issue and will include a link to a discussion issue. You can ask questions in the linked discussion issue.
Disclaimer
The information provided in this advisory is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
External Links
CVE-2024-30046
Revisions
V1.0 (May 14, 2024): Advisory published.
Version 1.0
Last Updated 2024-05-14