A .NET security update has been released for Ubuntu Linux 23.10.

[USN-6427-2] .NET vulnerability

==========================================================================
Ubuntu Security Notice USN-6427-2
October 19, 2023

dotnet8 vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 23.10

Summary:

.NET could be made to crash if it received specially crafted network
traffic.

Software Description:
- dotnet8: .NET CLI tools and runtime

Details:

USN-6427-1 fixed a vulnerability in .NET. This update
provides the corresponding update for .NET 8.

Original advisory 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 23.10:
   aspnetcore-runtime-8.0    8.0.0~rc2-0ubuntu1
   dotnet-host-8.0                 8.0.0~rc2-0ubuntu1
   dotnet-hostfxr-8.0             8.0.0~rc2-0ubuntu1
   dotnet-runtime-8.0            8.0.0~rc2-0ubuntu1
   dotnet-sdk-8.0                   8.0.100~rc2-0ubuntu1
   dotnet8                              8.0.100-8.0.0~rc2-0ubuntu1

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

References:
    https://ubuntu.com/security/notices/USN-6427-2
    https://ubuntu.com/security/notices/USN-6427-1
   CVE-2023-44487

Package Information:
https://launchpad.net/ubuntu/+source/dotnet8/8.0.100-8.0.0~rc2-0ubuntu1