USN-6438-2: .Net regressions

Releases

• Ubuntu 23.10

Packages

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

Details

USN-6438-1 fixed vulnerabilities in .Net. It was discovered that the fix
for CVE-2023-36799 was incomplete. This update fixes the problem.

Original advisory 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 - 6.0.124-0ubuntu1~23.10.1
• aspnetcore-runtime-7.0 - 7.0.113-0ubuntu1~23.10.1
• dotnet-host - 6.0.124-0ubuntu1~23.10.1
• dotnet-host-7.0 - 7.0.113-0ubuntu1~23.10.1
• dotnet-hostfxr-6.0 - 6.0.124-0ubuntu1~23.10.1
• dotnet-hostfxr-7.0 - 7.0.113-0ubuntu1~23.10.1
• dotnet-runtime-6.0 - 6.0.124-0ubuntu1~23.10.1
• dotnet-runtime-7.0 - 7.0.113-0ubuntu1~23.10.1
• dotnet-sdk-6.0 - 6.0.124-0ubuntu1~23.10.1
• dotnet-sdk-7.0 - 7.0.113-0ubuntu1~23.10.1
• dotnet6 - 6.0.124-0ubuntu1~23.10.1
• dotnet7 - 7.0.113-0ubuntu1~23.10.1

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

References

• CVE-2023-36799
• https://launchpad.net/bugs/2040207
• https://launchpad.net/bugs/2040208

Related notices

• USN-6362-1: netstandard-targeting-pack-2.1, dotnet-runtime-6.0, dotnet7, dotnet-apphost-pack-6.0, dotnet6, dotnet-host, dotnet-targeting-pack-7.0, aspnetcore-runtime-7.0, dotnet-hostfxr-6.0, aspnetcore-targeting-pack-6.0, dotnet-sdk-7.0, dotnet-templates-7.0, dotnet-sdk-6.0-source-built-artifacts, dotnet-runtime-7.0, dotnet-templates-6.0, dotnet-targeting-pack-6.0, aspnetcore-targeting-pack-7.0, dotnet-apphost-pack-7.0, netstandard-targeting-pack-2.1-7.0, dotnet-sdk-7.0-source-built-artifacts, dotnet-sdk-6.0, aspnetcore-runtime-6.0, dotnet-hostfxr-7.0, dotnet-host-7.0
• USN-6438-1: netstandard-targeting-pack-2.1, dotnet-runtime-6.0, dotnet7, dotnet-apphost-pack-6.0, dotnet6, dotnet-host, dotnet-targeting-pack-7.0, aspnetcore-runtime-7.0, dotnet-hostfxr-6.0, aspnetcore-targeting-pack-6.0, dotnet-sdk-7.0, dotnet-templates-7.0, dotnet-sdk-6.0-source-built-artifacts, dotnet-runtime-7.0, dotnet-templates-6.0, dotnet-targeting-pack-6.0, aspnetcore-targeting-pack-7.0, dotnet-apphost-pack-7.0, netstandard-targeting-pack-2.1-7.0, dotnet-sdk-7.0-source-built-artifacts, dotnet-sdk-6.0, aspnetcore-runtime-6.0, dotnet-hostfxr-7.0, dotnet-host-7.0
• USN-6362-2: netstandard-targeting-pack-2.1, dotnet-runtime-6.0, dotnet7, dotnet-apphost-pack-6.0, dotnet6, dotnet-host, dotnet-targeting-pack-7.0, aspnetcore-runtime-7.0, dotnet-hostfxr-6.0, aspnetcore-targeting-pack-6.0, dotnet-sdk-7.0, dotnet-templates-7.0, dotnet-sdk-6.0-source-built-artifacts, dotnet-runtime-7.0, dotnet-templates-6.0, dotnet-targeting-pack-6.0, aspnetcore-targeting-pack-7.0, dotnet-apphost-pack-7.0, netstandard-targeting-pack-2.1-7.0, dotnet-sdk-7.0-source-built-artifacts, dotnet-sdk-6.0, aspnetcore-runtime-6.0, dotnet-hostfxr-7.0, dotnet-host-7.0