.NET Core Elevation of Privilege 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 denial of service vulnerability exists in .NET 5.0, .NET Core 3.1 and .NET Core 2.1 where .NET (Core) server applications providing WebSocket endpoints could be tricked into endlessly looping while trying to read a single WebSocket frame.
Patches
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If you're using .NET 5.0, you should download and install Runtime 5.0.9 or SDK 5.0.206 (for Visual Studio 2019 v16.8) or SDK 5.0.303 (for Visual Studio 2019 V16.10) from https://dotnet.microsoft.com/download/dotnet-core/5.0.
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If you're using .NET Core 3.1, you should download and install Runtime 3.1.18 or SDK 3.1.118 (for Visual Studio 2019 v16.4) or 3.1.412 (for Visual Studio 2019 v16.7 or later) from https://dotnet.microsoft.com/download/dotnet-core/3.1.
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If you're using .NET Core 2.1, you should download and install Runtime 2.1.29 or SDK 2.1.525 (for Visual Studio 2019 v15.9) or 2.1.817 from https://dotnet.microsoft.com/download/dotnet-core/2.1.
Other Details
- Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/194
- An Issue for this can be found at https://github.com/dotnet/runtime/issues/57175
- MSRC details for this can be found at https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-26423
Software afectado
Haz clic en una tecnología para ver todas sus vulnerabilidades.
| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.linux-arm | >= 3.1.0, < 3.1.18, >= 5.0.0, < 5.0.9 | 3.1.18, 5.0.9 |
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.linux-arm64 | >= 3.1.0, < 3.1.18, >= 5.0.0, < 5.0.9 | 3.1.18, 5.0.9 |
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.linux-musl-arm | >= 5.0.0, < 5.0.9 | 5.0.9 |
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.linux-musl-arm64 | >= 3.1.0, < 3.1.18, >= 5.0.0, < 5.0.9 | 3.1.18, 5.0.9 |
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.linux-musl-x64 | >= 3.1.0, < 3.1.18, >= 5.0.0, < 5.0.9 | 3.1.18, 5.0.9 |
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.linux-x64 | >= 3.1.0, < 3.1.18, >= 5.0.0, < 5.0.9 | 3.1.18, 5.0.9 |
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.Mono.linux-arm | >= 5.0.0, < 5.0.9 | 5.0.9 |
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.Mono.linux-arm64 | >= 5.0.0, < 5.0.9 | 5.0.9 |
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.Mono.linux-musl-x64 | >= 5.0.0, < 5.0.9 | 5.0.9 |
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.Mono.linux-x64 | >= 5.0.0, < 5.0.9 | 5.0.9 |
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.Mono.LLVM.AOT.linux-arm64 | >= 5.0.0, < 5.0.9 | 5.0.9 |
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.Mono.LLVM.AOT.linux-x64 | >= 5.0.0, < 5.0.9 | 5.0.9 |
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.Mono.LLVM.AOT.osx-x64 | >= 5.0.0, < 5.0.9 | 5.0.9 |
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.Mono.LLVM.linux-arm64 | >= 5.0.0, < 5.0.9 | 5.0.9 |
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.Mono.LLVM.linux-x64 | >= 5.0.0, < 5.0.9 | 5.0.9 |
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.Mono.LLVM.osx-x64 | >= 5.0.0, < 5.0.9 | 5.0.9 |
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.Mono.osx-x64 | >= 5.0.0, < 5.0.9 | 5.0.9 |
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.osx-x64 | >= 3.1.0, < 3.1.18, >= 5.0.0, < 5.0.9 | 3.1.18, 5.0.9 |
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.rhel.6-x64 | >= 3.1.0, < 3.1.18 | 3.1.18 |
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.win-arm | >= 3.1.0, < 3.1.18, >= 5.0.0, < 5.0.9 | 3.1.18, 5.0.9 |
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.win-arm64 | >= 3.1.0, < 3.1.18, >= 5.0.0, < 5.0.9 | 3.1.18, 5.0.9 |
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.win-x64 | >= 3.1.0, < 3.1.18, >= 5.0.0, < 5.0.9 | 3.1.18, 5.0.9 |
| .NET (NuGet) | Microsoft.NETCore.App.Runtime.win-x86 | >= 3.1.0, < 3.1.18, >= 5.0.0, < 5.0.9 | 3.1.18, 5.0.9 |
Referencias
- Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Debilidad (CWE)
-- Plataforma
- .NET (NuGet)
- Paquete
Microsoft.NETCore.App.Runtime.linux-arm, Microsoft.NETCore.App.Runtime.linux-arm64, Microsoft.NETCore.App.Runtime.linux-musl-arm- Publicada
- 25.10.2022
- Actualizado
- 11.10.2026 11:23
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-rh58-r7jh-xhx3 - CC BY 4.0
Historial de vulnerabilidades: Microsoft.NETCore.App.Runtime.linux-musl-x64
Todas las vulnerabilidades publicadas de este paquete (.NET (NuGet)), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 35
- Primera → última
- 09.2020 10.2026
- Sin corrección
- 0
- Explotada en ataques
- 1
Distribución por gravedad
- Alta 22
- Media 12
- Baja 1
Divulgaciones por año
- 2020: 1
- 2021: 0
- 2022: 6
- 2023: 5
- 2024: 4
- 2025: 5
- 2026: 14
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.NET Core Elevation of Privilege Vulnerability esta entrada
Identifica las vulnerabilidades de tu aplicación
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