USN-6427-1: .NET vulnerability

Releases

• Ubuntu 23.04
• Ubuntu 22.04 LTS

Packages

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

Details

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.

Update instructions

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

Ubuntu 23.04

• aspnetcore-runtime-6.0 - 6.0.123-0ubuntu1~23.04.1
• aspnetcore-runtime-7.0 - 7.0.112-0ubuntu1~23.04.1
• dotnet-host - 6.0.123-0ubuntu1~23.04.1
• dotnet-host-7.0 - 7.0.112-0ubuntu1~23.04.1
• dotnet-hostfxr-6.0 - 6.0.123-0ubuntu1~23.04.1
• dotnet-hostfxr-7.0 - 7.0.112-0ubuntu1~23.04.1
• dotnet-runtime-6.0 - 6.0.123-0ubuntu1~23.04.1
• dotnet-runtime-7.0 - 7.0.112-0ubuntu1~23.04.1
• dotnet-sdk-6.0 - 6.0.123-0ubuntu1~23.04.1
• dotnet-sdk-7.0 - 7.0.112-0ubuntu1~23.04.1
• dotnet6 - 6.0.123-0ubuntu1~23.04.1
• dotnet7 - 7.0.112-0ubuntu1~23.04.1

Ubuntu 22.04

• aspnetcore-runtime-6.0 - 6.0.123-0ubuntu1~22.04.1
• aspnetcore-runtime-7.0 - 7.0.112-0ubuntu1~22.04.1
• dotnet-host - 6.0.123-0ubuntu1~22.04.1
• dotnet-host-7.0 - 7.0.112-0ubuntu1~22.04.1
• dotnet-hostfxr-6.0 - 6.0.123-0ubuntu1~22.04.1
• dotnet-hostfxr-7.0 - 7.0.112-0ubuntu1~22.04.1
• dotnet-runtime-6.0 - 6.0.123-0ubuntu1~22.04.1
• dotnet-runtime-7.0 - 7.0.112-0ubuntu1~22.04.1
• dotnet-sdk-6.0 - 6.0.123-0ubuntu1~22.04.1
• dotnet-sdk-7.0 - 7.0.112-0ubuntu1~22.04.1
• dotnet6 - 6.0.123-0ubuntu1~22.04.1
• dotnet7 - 7.0.112-0ubuntu1~22.04.1

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

References

• CVE-2023-44487

Related notices

• USN-6427-2: dotnet8, aspnetcore-runtime-8.0, netstandard-targeting-pack-2.1-8.0, dotnet-runtime-8.0, dotnet-apphost-pack-8.0, aspnetcore-targeting-pack-8.0, dotnet-sdk-8.0, dotnet-targeting-pack-8.0, dotnet-host-8.0, dotnet-hostfxr-8.0, dotnet-templates-8.0, dotnet-sdk-8.0-source-built-artifacts
• USN-6438-1: dotnet-sdk-6.0-source-built-artifacts, dotnet-runtime-7.0, dotnet-sdk-7.0, dotnet-templates-7.0, dotnet-sdk-7.0-source-built-artifacts, dotnet-templates-6.0, dotnet6, dotnet-runtime-6.0, aspnetcore-runtime-6.0, dotnet-apphost-pack-6.0, aspnetcore-runtime-7.0, dotnet-sdk-6.0, netstandard-targeting-pack-2.1-7.0, dotnet-hostfxr-6.0, aspnetcore-targeting-pack-7.0, aspnetcore-targeting-pack-6.0, dotnet-apphost-pack-7.0, dotnet-hostfxr-7.0, dotnet-targeting-pack-7.0, dotnet-host-7.0, dotnet-host, dotnet7, netstandard-targeting-pack-2.1, dotnet-targeting-pack-6.0