.NET Denial of Service Vulnerability
Date: 2024-11
Affected: nuget/System.Formats.Nrbf
Attack vector: dos
Category: vulnerability-disclosure
Severity: High
CVE: CVE-2024-43499
CWE: CWE-409
CWE-606
CVSS: 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

# 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


Mitigations:

Architectural layers (MAESTRO):