.NET Core Remote Code Execution Vulnerability
.NET Core Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-24112.
Executive summary
Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 5.0, .NET Core 3.1, and .NET Core 2.1. 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 5 and .NET Core due to how text encoding is performed.
Discussion
Discussion for this issue can be found at dotnet/runtime#49377
Mitigation factors
Microsoft has not identified any mitigating factors for this vulnerability.
Affected software
The vulnerable package is System.Text.Encodings.Web . Upgrading your package and redeploying your app should be sufficient to address this vulnerability.
Vulnerable package versions:
Any .NET 5, .NET Core, or .NET Framework based application that uses the System.Text.Encodings.Web package with a vulnerable version listed below.
| Package Name | Vulnerable Versions | Secure Versions |
|---|---|---|
| System.Text.Encodings.Web | 4.0.0 - 4.5.0 | 4.5.1 |
| System.Text.Encodings.Web | 4.6.0-4.7.1 | 4.7.2 |
| System.Text.Encodings.Web | 5.0.0 | 5.0.1 |
Please validate that each of the .NET versions you are using is in support. Security updates are only provided for supported .NET versions.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| .NET (NuGet) | System.Text.Encodings.Web | >= 4.0.0, < 4.5.1, >= 4.6.0, < 4.7.2, >= 5.0.0, < 5.0.1 | 4.5.1, 4.7.2, 5.0.1 |
Referencias
- https://nvd.nist.gov/vuln/detail/CVE-2021-26701
- https://github.com/dotnet/announcements/issues/178
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S2AZOUKMCHT2WBHR7MYDTYXWOBHZW5P5
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TW3ZSJTTMZAFKGW7NJWTVVFZUYYU2SJZ
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UBOSSX7U6BSHV5RI74FCOW4ITJ5RRJR5
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WA5WQJVHUL5C4XMJTLY3C67R4WP35EF4
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XPUKFHIGP5YNJRRFWKDJ2XRS4WTFJNNK
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YLFATXASXW4OV2ZBSRP4G55HJH73QPBP
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S2AZOUKMCHT2WBHR7MYDTYXWOBHZW5P5
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TW3ZSJTTMZAFKGW7NJWTVVFZUYYU2SJZ
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UBOSSX7U6BSHV5RI74FCOW4ITJ5RRJR5
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WA5WQJVHUL5C4XMJTLY3C67R4WP35EF4
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XPUKFHIGP5YNJRRFWKDJ2XRS4WTFJNNK
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YLFATXASXW4OV2ZBSRP4G55HJH73QPBP
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26701
- Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Debilidad (CWE)
-- Plataforma
- .NET (NuGet)
- Paquete
System.Text.Encodings.Web- Publicada
- 21.04.2021
- Actualizado
- 11.10.2026 11:23
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-ghhp-997w-qr28 - CC BY 4.0
Historial de vulnerabilidades: System.Text.Encodings.Web
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
- 5
- Primera → última
- 10.2018 04.2021
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Crítica 1
- Alta 2
- Media 2
Divulgaciones por año
- 2018: 4
- 2019: 0
- 2020: 0
- 2021: 1
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
-
.NET Core Remote Code Execution Vulnerability esta entrada
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