Microsoft Security Advisory CVE-2023-36799: .NET Denial of Service Vulnerability
Date: 2023-09
Affected: nuget/Microsoft.NETCore.App.Runtime.linux-musl-arm64, nuget/Microsoft.NETCore.App.Runtime.linux-arm64, nuget/Microsoft.NETCore.App.Runtime.linux-arm
Attack vector: dos
Category: vulnerability-disclosure
Severity: Medium
CVE: CVE-2023-36799
CWE: CWE-400
CVSS: 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)

# Microsoft Security Advisory CVE-2023-36799: .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 where reading a maliciously crafted X.509 certificate may result in Denial of Service. This issue only affects Linux systems. ## Announcement Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/275 ### <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 7.0.10 or earlier. * Any .NET 6.0 application running on .NET 6.0.21 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.NETCore.App.Runtime.linux-arm64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-arm64) | >= 7.0.0, <= 7.0.10 | 7.0.11 [Microsoft.NETCore.App.Runtime.linux-musl-arm64](https://www.nuget.org/packages/Microsoft.NETCore.App.Runtime.linux-musl-arm64) | >= 7.0.0


Mitigations:

Architectural layers (MAESTRO):