A .Net regressions update has been released for Ubuntu Linux 22.04 LTS and 23.04.

[USN-6362-2] .Net regressions

=========================================================================
Ubuntu Security Notice USN-6362-2
October 25, 2023

.Net regressions
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 23.04
- Ubuntu 22.04 LTS

Summary:

An incomplete fix was discovered in .Net.

Software Description:
- dotnet6: dotNET CLI tools and runtime
- dotnet7: dotNET CLI tools and runtime

Details:

USN-6362-1 fixed vulnerabilities in .Net. It was discovered that the fix
for [CVE-2023-36799]( https://ubuntu.com/security/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.

Update instructions:

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

Ubuntu 23.04:
aspnetcore-runtime-6.0 6.0.124-0ubuntu1~23.04.1
aspnetcore-runtime-7.0 7.0.113-0ubuntu1~23.04.1
dotnet-host 6.0.124-0ubuntu1~23.04.1
dotnet-host-7.0 7.0.113-0ubuntu1~23.04.1
dotnet-hostfxr-6.0 6.0.124-0ubuntu1~23.04.1
dotnet-hostfxr-7.0 7.0.113-0ubuntu1~23.04.1
dotnet-runtime-6.0 6.0.124-0ubuntu1~23.04.1
dotnet-runtime-7.0 7.0.113-0ubuntu1~23.04.1
dotnet-sdk-6.0 6.0.124-0ubuntu1~23.04.1
dotnet-sdk-7.0 7.0.113-0ubuntu1~23.04.1
dotnet6 6.0.124-0ubuntu1~23.04.1
dotnet7 7.0.113-0ubuntu1~23.04.1

Ubuntu 22.04 LTS:
aspnetcore-runtime-6.0 6.0.124-0ubuntu1~22.04.1
aspnetcore-runtime-7.0 7.0.113-0ubuntu1~22.04.1
dotnet-host 6.0.124-0ubuntu1~22.04.1
dotnet-host-7.0 7.0.113-0ubuntu1~22.04.1
dotnet-hostfxr-6.0 6.0.124-0ubuntu1~22.04.1
dotnet-hostfxr-7.0 7.0.113-0ubuntu1~22.04.1
dotnet-runtime-6.0 6.0.124-0ubuntu1~22.04.1
dotnet-runtime-7.0 7.0.113-0ubuntu1~22.04.1
dotnet-sdk-6.0 6.0.124-0ubuntu1~22.04.1
dotnet-sdk-7.0 7.0.113-0ubuntu1~22.04.1
dotnet6 6.0.124-0ubuntu1~22.04.1
dotnet7 7.0.113-0ubuntu1~22.04.1

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

References:
https://ubuntu.com/security/notices/USN-6362-2
https://ubuntu.com/security/notices/USN-6362-1
CVE-2023-36799, https://launchpad.net/bugs/2040207, https://launchpad.net/bugs/2040208

Package Information:
https://launchpad.net/ubuntu/+source/dotnet6/6.0.124-0ubuntu1~23.04.1
https://launchpad.net/ubuntu/+source/dotnet7/7.0.113-0ubuntu1~23.04.1
https://launchpad.net/ubuntu/+source/dotnet6/6.0.124-0ubuntu1~22.04.1
https://launchpad.net/ubuntu/+source/dotnet7/7.0.113-0ubuntu1~22.04.1