USN-6438-1: .NET vulnerabilities

Releases

• Ubuntu 23.10

Packages

• dotnet6 - dotNET CLI tools and runtime
• dotnet7 - dotNET CLI tools and runtime

Details

Kevin Jones discovered that .NET did not properly process certain
X.509 certificates. An attacker could possibly use this issue to
cause a denial of service. (CVE-2023-36799)

It was discovered that the .NET Kestrel web server did not properly
handle HTTP/2 requests. A remote attacker could possibly use this
issue to cause a denial of service. (CVE-2023-44487)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 23.10

• aspnetcore-runtime-6.0 - 6.0.123-0ubuntu1
• aspnetcore-runtime-7.0 - 7.0.112-0ubuntu1
• dotnet-host - 6.0.123-0ubuntu1
• dotnet-host-7.0 - 7.0.112-0ubuntu1
• dotnet-hostfxr-6.0 - 6.0.123-0ubuntu1
• dotnet-hostfxr-7.0 - 7.0.112-0ubuntu1
• dotnet-runtime-6.0 - 6.0.123-0ubuntu1
• dotnet-runtime-7.0 - 7.0.112-0ubuntu1
• dotnet-sdk-6.0 - 6.0.123-0ubuntu1
• dotnet-sdk-7.0 - 7.0.112-0ubuntu1
• dotnet6 - 6.0.123-0ubuntu1
• dotnet7 - 7.0.112-0ubuntu1

In general, a standard system update will make all the necessary changes.

References

• CVE-2023-36799
• CVE-2023-44487

Related notices

• USN-6362-1: dotnet-sdk-6.0-source-built-artifacts, dotnet-hostfxr-7.0, dotnet-sdk-7.0, dotnet-runtime-7.0, aspnetcore-targeting-pack-6.0, dotnet-apphost-pack-6.0, dotnet-runtime-6.0, aspnetcore-targeting-pack-7.0, dotnet-sdk-6.0, dotnet-hostfxr-6.0, netstandard-targeting-pack-2.1-7.0, aspnetcore-runtime-7.0, dotnet-host, dotnet7, dotnet-templates-7.0, dotnet-targeting-pack-6.0, dotnet-host-7.0, dotnet-apphost-pack-7.0, dotnet6, aspnetcore-runtime-6.0, dotnet-sdk-7.0-source-built-artifacts, dotnet-targeting-pack-7.0, netstandard-targeting-pack-2.1, dotnet-templates-6.0
• USN-6438-2: dotnet-sdk-6.0-source-built-artifacts, dotnet-hostfxr-7.0, dotnet-sdk-7.0, dotnet-runtime-7.0, aspnetcore-targeting-pack-6.0, dotnet-apphost-pack-6.0, dotnet-runtime-6.0, aspnetcore-targeting-pack-7.0, dotnet-sdk-6.0, dotnet-hostfxr-6.0, netstandard-targeting-pack-2.1-7.0, aspnetcore-runtime-7.0, dotnet-host, dotnet7, dotnet-templates-7.0, dotnet-targeting-pack-6.0, dotnet-host-7.0, dotnet-apphost-pack-7.0, dotnet6, aspnetcore-runtime-6.0, dotnet-sdk-7.0-source-built-artifacts, dotnet-targeting-pack-7.0, netstandard-targeting-pack-2.1, dotnet-templates-6.0
• USN-6362-2: dotnet-sdk-6.0-source-built-artifacts, dotnet-hostfxr-7.0, dotnet-sdk-7.0, dotnet-runtime-7.0, aspnetcore-targeting-pack-6.0, dotnet-apphost-pack-6.0, dotnet-runtime-6.0, aspnetcore-targeting-pack-7.0, dotnet-sdk-6.0, dotnet-hostfxr-6.0, netstandard-targeting-pack-2.1-7.0, aspnetcore-runtime-7.0, dotnet-host, dotnet7, dotnet-templates-7.0, dotnet-targeting-pack-6.0, dotnet-host-7.0, dotnet-apphost-pack-7.0, dotnet6, aspnetcore-runtime-6.0, dotnet-sdk-7.0-source-built-artifacts, dotnet-targeting-pack-7.0, netstandard-targeting-pack-2.1, dotnet-templates-6.0
• USN-6427-1: dotnet-sdk-6.0-source-built-artifacts, dotnet-hostfxr-7.0, dotnet-sdk-7.0, dotnet-runtime-7.0, aspnetcore-targeting-pack-6.0, dotnet-apphost-pack-6.0, dotnet-runtime-6.0, aspnetcore-targeting-pack-7.0, dotnet-sdk-6.0, dotnet-hostfxr-6.0, netstandard-targeting-pack-2.1-7.0, aspnetcore-runtime-7.0, dotnet-host, dotnet7, dotnet-templates-7.0, dotnet-targeting-pack-6.0, dotnet-host-7.0, dotnet-apphost-pack-7.0, dotnet6, aspnetcore-runtime-6.0, dotnet-sdk-7.0-source-built-artifacts, dotnet-targeting-pack-7.0, netstandard-targeting-pack-2.1, dotnet-templates-6.0
• USN-6427-2: dotnet-sdk-8.0, dotnet-templates-8.0, dotnet-host-8.0, dotnet-targeting-pack-8.0, dotnet8, dotnet-apphost-pack-8.0, netstandard-targeting-pack-2.1-8.0, dotnet-sdk-8.0-source-built-artifacts, dotnet-hostfxr-8.0, dotnet-runtime-8.0, aspnetcore-runtime-8.0, aspnetcore-targeting-pack-8.0
• USN-6505-1: libnghttp2-dev, libnghttp2-doc, nghttp2-client, nghttp2-server, nghttp2, libnghttp2-14, nghttp2-proxy