==========================================================================
Ubuntu Security Notice USN-6578-1
January 11, 2024

dotnet6, dotnet7, dotnet8 vulnerabilities
==========================================================================

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

- Ubuntu 23.10
- Ubuntu 23.04
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in dotnet6, dotnet7, and dotnet8.

Software Description:
- dotnet6: dotNET CLI tools and runtime
- dotnet7: dotNET CLI tools and runtime
- dotnet8: dotNET CLI tools and runtime

Details:

Vishal Mishra and Anita Gaud discovered that .NET did not properly
validate X.509 certificates with malformed signatures. An attacker
could possibly use this issue to bypass an application's typical
authentication logic. (CVE-2024-0057)

Morgan Brown discovered that .NET did not properly handle requests from
unauthenticated clients. An attacker could possibly use this issue to
cause a denial of service. (CVE-2024-21319)

Update instructions:

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

Ubuntu 23.10:
   aspnetcore-runtime-6.0          6.0.126-0ubuntu1~23.10.1
   aspnetcore-runtime-7.0          7.0.115-0ubuntu1~23.10.1
   aspnetcore-runtime-8.0          8.0.1-0ubuntu1~23.10.1
   dotnet-host                     6.0.126-0ubuntu1~23.10.1
   dotnet-host-7.0                 7.0.115-0ubuntu1~23.10.1
   dotnet-host-8.0                 8.0.1-0ubuntu1~23.10.1
   dotnet-hostfxr-6.0              6.0.126-0ubuntu1~23.10.1
   dotnet-hostfxr-7.0              7.0.115-0ubuntu1~23.10.1
   dotnet-hostfxr-8.0              8.0.1-0ubuntu1~23.10.1
   dotnet-runtime-6.0              6.0.126-0ubuntu1~23.10.1
   dotnet-runtime-7.0              7.0.115-0ubuntu1~23.10.1
   dotnet-runtime-8.0              8.0.1-0ubuntu1~23.10.1
   dotnet-sdk-6.0                  6.0.126-0ubuntu1~23.10.1
   dotnet-sdk-7.0                  7.0.115-0ubuntu1~23.10.1
   dotnet-sdk-8.0                  8.0.101-0ubuntu1~23.10.1
   dotnet6                         6.0.126-0ubuntu1~23.10.1
   dotnet7                         7.0.115-0ubuntu1~23.10.1
   dotnet8                         8.0.101-8.0.1-0ubuntu1~23.10.1

Ubuntu 23.04:
   aspnetcore-runtime-6.0          6.0.126-0ubuntu1~23.04.1
   aspnetcore-runtime-7.0          7.0.115-0ubuntu1~23.04.1
   dotnet-host                     6.0.126-0ubuntu1~23.04.1
   dotnet-host-7.0                 7.0.115-0ubuntu1~23.04.1
   dotnet-hostfxr-6.0              6.0.126-0ubuntu1~23.04.1
   dotnet-hostfxr-7.0              7.0.115-0ubuntu1~23.04.1
   dotnet-runtime-6.0              6.0.126-0ubuntu1~23.04.1
   dotnet-runtime-7.0              7.0.115-0ubuntu1~23.04.1
   dotnet-sdk-6.0                  6.0.126-0ubuntu1~23.04.1
   dotnet-sdk-7.0                  7.0.115-0ubuntu1~23.04.1
   dotnet6                         6.0.126-0ubuntu1~23.04.1
   dotnet7                         7.0.115-0ubuntu1~23.04.1

Ubuntu 22.04 LTS:
   aspnetcore-runtime-6.0          6.0.126-0ubuntu1~22.04.1
   aspnetcore-runtime-7.0          7.0.115-0ubuntu1~22.04.1
   dotnet-host                     6.0.126-0ubuntu1~22.04.1
   dotnet-host-7.0                 7.0.115-0ubuntu1~22.04.1
   dotnet-hostfxr-6.0              6.0.126-0ubuntu1~22.04.1
   dotnet-hostfxr-7.0              7.0.115-0ubuntu1~22.04.1
   dotnet-runtime-6.0              6.0.126-0ubuntu1~22.04.1
   dotnet-runtime-7.0              7.0.115-0ubuntu1~22.04.1
   dotnet-sdk-6.0                  6.0.126-0ubuntu1~22.04.1
   dotnet-sdk-7.0                  7.0.115-0ubuntu1~22.04.1
   dotnet6                         6.0.126-0ubuntu1~22.04.1
   dotnet7                         7.0.115-0ubuntu1~22.04.1

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

References:
   https://ubuntu.com/security/notices/USN-6578-1
   CVE-2024-0057, CVE-2024-21319

Package Information:
https://launchpad.net/ubuntu/+source/dotnet6/6.0.126-0ubuntu1~23.10.1
https://launchpad.net/ubuntu/+source/dotnet7/7.0.115-0ubuntu1~23.10.1
https://launchpad.net/ubuntu/+source/dotnet8/8.0.101-8.0.1-0ubuntu1~23.10.1
https://launchpad.net/ubuntu/+source/dotnet6/6.0.126-0ubuntu1~23.04.1
https://launchpad.net/ubuntu/+source/dotnet7/7.0.115-0ubuntu1~23.04.1
https://launchpad.net/ubuntu/+source/dotnet6/6.0.126-0ubuntu1~22.04.1
https://launchpad.net/ubuntu/+source/dotnet7/7.0.115-0ubuntu1~22.04.1