==========================================================================
Ubuntu Security Notice USN-6634-1
February 13, 2024

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

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

- Ubuntu 23.10
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in .NET.

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

Details:

Brennan Conroy discovered that .NET with SignalR did not properly
handle malicious clients. An attacker could possibly use this issue
to cause a denial of service. (CVE-2024-21386)

Bahaa Naamneh discovered that .NET with OpenSSL support did not
properly parse X509 certificates. An attacker could possibly use
this issue to cause a denial of service. (CVE-2024-21404)

Update instructions:

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

Ubuntu 23.10:
   aspnetcore-runtime-6.0          6.0.127-0ubuntu1~23.10.1
   aspnetcore-runtime-7.0          7.0.116-0ubuntu1~23.10.1
   aspnetcore-runtime-8.0          8.0.2-0ubuntu1~23.10.1
   dotnet-host                     6.0.127-0ubuntu1~23.10.1
   dotnet-host-7.0                 7.0.116-0ubuntu1~23.10.1
   dotnet-host-8.0                 8.0.2-0ubuntu1~23.10.1
   dotnet-hostfxr-6.0              6.0.127-0ubuntu1~23.10.1
   dotnet-hostfxr-7.0              7.0.116-0ubuntu1~23.10.1
   dotnet-hostfxr-8.0              8.0.2-0ubuntu1~23.10.1
   dotnet-runtime-6.0              6.0.127-0ubuntu1~23.10.1
   dotnet-runtime-7.0              7.0.116-0ubuntu1~23.10.1
   dotnet-runtime-8.0              8.0.2-0ubuntu1~23.10.1
   dotnet-sdk-6.0                  6.0.127-0ubuntu1~23.10.1
   dotnet-sdk-7.0                  7.0.116-0ubuntu1~23.10.1
   dotnet-sdk-8.0                  8.0.102-0ubuntu1~23.10.1
   dotnet6                         6.0.127-0ubuntu1~23.10.1
   dotnet7                         7.0.116-0ubuntu1~23.10.1
   dotnet8                         8.0.102-8.0.2-0ubuntu1~23.10.1

Ubuntu 22.04 LTS:
   aspnetcore-runtime-6.0          6.0.127-0ubuntu1~22.04.1
   aspnetcore-runtime-7.0          7.0.116-0ubuntu1~22.04.1
   aspnetcore-runtime-8.0          8.0.2-0ubuntu1~22.04.1
   dotnet-host                     6.0.127-0ubuntu1~22.04.1
   dotnet-host-7.0                 7.0.116-0ubuntu1~22.04.1
   dotnet-host-8.0                 8.0.2-0ubuntu1~22.04.1
   dotnet-hostfxr-6.0              6.0.127-0ubuntu1~22.04.1
   dotnet-hostfxr-7.0              7.0.116-0ubuntu1~22.04.1
   dotnet-hostfxr-8.0              8.0.2-0ubuntu1~22.04.1
   dotnet-runtime-6.0              6.0.127-0ubuntu1~22.04.1
   dotnet-runtime-7.0              7.0.116-0ubuntu1~22.04.1
   dotnet-runtime-8.0              8.0.2-0ubuntu1~22.04.1
   dotnet-sdk-6.0                  6.0.127-0ubuntu1~22.04.1
   dotnet-sdk-7.0                  7.0.116-0ubuntu1~22.04.1
   dotnet-sdk-8.0                  8.0.102-0ubuntu1~22.04.1
   dotnet6                         6.0.127-0ubuntu1~22.04.1
   dotnet7                         7.0.116-0ubuntu1~22.04.1
   dotnet8                         8.0.102-8.0.2-0ubuntu1~22.04.1

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

References:
   https://ubuntu.com/security/notices/USN-6634-1
   CVE-2024-21386, CVE-2024-21404

Package Information:
https://launchpad.net/ubuntu/+source/dotnet6/6.0.127-0ubuntu1~23.10.1
https://launchpad.net/ubuntu/+source/dotnet7/7.0.116-0ubuntu1~23.10.1
https://launchpad.net/ubuntu/+source/dotnet8/8.0.102-8.0.2-0ubuntu1~23.10.1
https://launchpad.net/ubuntu/+source/dotnet6/6.0.127-0ubuntu1~22.04.1
https://launchpad.net/ubuntu/+source/dotnet7/7.0.116-0ubuntu1~22.04.1
https://launchpad.net/ubuntu/+source/dotnet8/8.0.102-8.0.2-0ubuntu1~22.04.1