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ALSA-2024:9543 — Important: .NET 9.0 security update

Affected: AlmaLinux:9: aspnetcore-runtime-9.0, AlmaLinux:9: aspnetcore-runtime-dbg-9.0, AlmaLinux:9: aspnetcore-targeting-pack-9.0, AlmaLinux:9: dotnet-apphost-pack-9.0, AlmaLinux:9: dotnet-host, AlmaLinux:9: dotnet-hostfxr-9.0, AlmaLinux:9: dotnet-runtime-9.0, AlmaLinux:9: dotnet-runtime-dbg-9.0, AlmaLinux:9: dotnet-sdk-9.0, AlmaLinux:9: dotnet-sdk-9.0-source-built-artifacts and 5 more

.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 9.0.100 and .NET Runtime 9.0.1.0.

Security Fix(es):

* dotnet: Type confusion vulnerability leads to AV in .NET Core NrbfDecoder component (CVE-2024-43498) * dotnet: .NET Core - DoS - (unbounded work factor) in NrbfDecoder component (CVE-2024-43499)

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.Security Fix(es):

* dotnet: Type confusion vulnerability leads to AV in .NET Core NrbfDecoder component (CVE-2024-43498) * dotnet: .NET Core - DoS - (unbounded work factor) in NrbfDecoder component (CVE-2024-43499)

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.

BIT-dotnet-2024-43499 — .NET and Visual Studio Denial of Service Vulnerability

Affected: Bitnami: dotnet

.NET and Visual Studio Denial of Service Vulnerability

certfr-2024-avi-0976 — De multiples vulnérabilités ont été découvertes dans Microsoft .Net. Elles permettent à un attaquant de provoquer une e…

certfr-2024-avi-0976

EUVD-2026-251211

fkie_cve-2024-43499

.NET and Visual Studio Denial of Service Vulnerability

GHSA-6x36-qxmj-rv4p — .NET Denial of Service Vulnerability

Affected: NuGet: System.Formats.Nrbf

# Microsoft Security Advisory CVE-2024-43499 | .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 9.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

The NrbfDecoder component in .NET 9 contains a denial of service vulnerability due to incorrect input validation.

## Announcement

Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/333

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

Applications that do not use the NrbfDecoder component are not affected by this vulnerability. By default, .NET console apps and web apps do not reference this component.

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

* Any .NET 9.0 application running on .NET 9.0.0.RC.2 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 9"></a>.NET 9 Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- [System.Formats.Nrbf](https://www.nuget.org/packages/System.Formats.Nrbf) | <9.0.0 | 9.0.0

## 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…

msrc_CVE-2024-43499 — .NET and Visual Studio Denial of Service Vulnerability

msrc_CVE-2024-43499

RHSA-2024:9543 — Red Hat Security Advisory: .NET 9.0 security update

dotnet: Type confusion vulnerability leads to AV in .NET Core NrbfDecoder component dotnet: .NET Core - DoS - (unbounded work factor) in NrbfDecoder component

UBUNTU-CVE-2024-43499

Affected: Ubuntu:22.04:LTS: dotnet7

.NET and Visual Studio Denial of Service Vulnerability

WID-SEC-W-2024-3452 — Microsoft DeveloperTools: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Microsoft Visual Studio Code, Microsoft Visual Studio 2022 und Microsoft Windows ausnutzen, um seine Privilegien zu erhöhen, beliebigen Code auszuführen und einen Denial-of-Service-Zustand zu erzeugen.