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ALSA-2023:3581 — Important: .NET 6.0 security, bug fix, and enhancement update

Affected: AlmaLinux:9: aspnetcore-runtime-6.0, AlmaLinux:9: aspnetcore-targeting-pack-6.0, AlmaLinux:9: dotnet-apphost-pack-6.0, AlmaLinux:9: dotnet-hostfxr-6.0, AlmaLinux:9: dotnet-runtime-6.0, AlmaLinux:9: dotnet-sdk-6.0, AlmaLinux:9: dotnet-sdk-6.0-source-built-artifacts, AlmaLinux:9: dotnet-targeting-pack-6.0, AlmaLinux:9: dotnet-templates-6.0

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 6.0.118 and .NET Runtime 6.0.18.

The following packages have been upgraded to a later upstream version: dotnet6.0 (6.0.118). (BZ#2212379)

Security Fix(es):

* dotnet: .NET Kestrel: Denial of Service processing X509 Certificates (CVE-2023-29331) * dotnet: vulnerability exists in NuGet where a potential race condition can lead to a symlink attack (CVE-2023-29337) * dotnet: Remote Code Execution - Source generators issue can lead to a crash due to unmanaged heap corruption (CVE-2023-33128) * dotnet: Bypass restrictions when deserializing a DataSet or DataTable from XML (CVE-2023-24936)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

bdu:2023-03439

BIT-dotnet-2023-29331 — .NET, .NET Framework, and Visual Studio Denial of Service Vulnerability

Affected: Bitnami: dotnet

.NET, .NET Framework, and Visual Studio Denial of Service Vulnerability

certfr-2023-avi-0463 — De multiples vulnérabilités ont été corrigées dans Microsoft .Net. Elles permettent à un at…

certfr-2023-avi-0463

CLEANSTART-2025-IL60395 — .NET, .NET Framework, and Visual Studio Denial of Service Vulnerability

Affected: CleanStart: dotnet6-build, CleanStart: dotnet6-runtime

CVE-2023-29331 affects multiple packages. . See references for individual vulnerability details.

EUVD-2026-220125

fkie_cve-2023-29331

.NET, .NET Framework, and Visual Studio Denial of Service Vulnerability

GHSA-555c-2p6r-68mm — .NET Denial of Service vulnerability

Affected: NuGet: Microsoft.Windows.Compatibility, NuGet: System.Security.Cryptography.Pkcs, NuGet: Microsoft.NETCore.App.Runtime.linux-arm, NuGet: Microsoft.NETCore.App.Runtime.linux-arm64, NuGet: Microsoft.NETCore.App.Runtime.linux-musl-arm, NuGet: Microsoft.NETCore.App.Runtime.linux-musl-arm64, NuGet: Microsoft.NETCore.App.Runtime.linux-musl-x64, NuGet: Microsoft.NETCore.App.Runtime.linux-x64, NuGet: Microsoft.NETCore.App.Runtime.osx-arm64, NuGet: Microsoft.NETCore.App.Runtime.osx-x64 and 4 more

# Microsoft Security Advisory CVE-2023-29331: .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 6.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

A vulnerability exists in .NET when processing X.509 certificates that may result in Denial of Service.

Details: [KB5025823 ](https://support.microsoft.com/kb/5025823)

## Announcement

Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/257

### <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 7.0.5 or earlier. * Any .NET 6.0 application running on .NET 6.0.16 or earlier.

If your application uses the following package versions, ensure you update to the latest version of .NET.

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

Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- [Microsoft.Windows.Compatibility](https://www.nuget.org/packages/Microsoft.Windows.Compatibility) | >= 7.0.0, < 7.0.1 | 7.0.3 [System.Security.Cryptography.Pkcs](https://www.nuget.org/packages/System.Security.Cryptography.Pkcs) | >= 7.0.0, < 7.0.1 |…

gsd-2023-29331

ICSA-23-320-12 — Siemens PNI

.NET and Visual Studio Information Disclosure Vulnerability. zlib through 1.2.12 has a heap-based buffer over-read or buffer overflow in inflate in inflate.c via a large gzip header extra field. NOTE: only applications that call inflateGetHeader are affected. Some common applications bundle the affected zlib source code but may be unable to call inflateGetHeader (e.g., see the nodejs/node reference). NuGet Client Elevation of Privilege Vulnerability. .NET and Visual Studio Remote Code Execution Vulnerability .NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability .NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability .NET, .NET Framework, and Visual Studio Elevation of Privilege Vulnerability .NET DLL Hijacking Remote Code Execution Vulnerability .NET, .NET Framework, and Visual Studio Denial of Service Vulnerability .NET and Visual Studio Elevation of Privilege Vulnerability .NET and Visual Studio Remote Code Execution Vulnerability .NET and Visual Studio Remote Code Execution Vulnerability .NET and Visual Studio Elevation of Privilege Vulnerability

msrc_CVE-2023-29331 — .NET, .NET Framework, and Visual Studio Denial of Service Vulnerability

msrc_CVE-2023-29331

RHSA-2023:3580 — Red Hat Security Advisory: .NET 6.0 security, bug fix, and enhancement update

dotnet: Bypass restrictions when deserializing a DataSet or DataTable from XML dotnet: .NET Kestrel: Denial of Service processing X509 Certificates dotnet: vulnerability exists in NuGet where a potential race condition can lead to a symlink attack dotnet: Remote Code Execution - Source generators issue can lead to a crash due to unmanaged heap corruption

RHSA-2023:3581 — Red Hat Security Advisory: .NET 6.0 security, bug fix, and enhancement update

UBUNTU-CVE-2023-29331

Affected: Ubuntu:22.04:LTS: dotnet6, Ubuntu:22.04:LTS: dotnet7

.NET, .NET Framework, and Visual Studio Denial of Service Vulnerability

VDE-2026-064 — METTLER TOLEDO: LabX Standard Report on External Component Analysis - v21.3

Multiple vulnerabilities have been discovered in LabX Standard v21.3.22. Most of the vulnerabilities are fixed in LabX Standard v21.4.23. The Vulnerabilities CVE-2025-69419, CVE-2026-0915, CVE-2025-15467 and CVE-2025-58187 are not yet fixed. The fix will be available in the upcoming releases.

Notice: LabX Standard was formerly known as LabX Cloud Local.

WID-SEC-W-2023-1446 — Microsoft Developer Tools: Mehrere Schwachstellen

Ein entfernter, anonymer, authentisierter oder lokaler Angreifer kann mehrere Schwachstellen in Microsoft .NET Framework, Microsoft Azure DevOps Server, Microsoft NuGet, Microsoft Visual Studio und Microsoft Visual Studio Code ausnutzen, um beliebigen Code auszuführen, vertrauliche Informationen offenzulegen, einen Denial-of-Service-Zustand herbeizuführen, seine Rechte zu erweitern und Daten zu manipulieren.