==========================================================================
Ubuntu Security Notice USN-6480-1
November 15, 2023

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 .NET.

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

Details:

Barry Dorrans discovered that .NET did not properly implement certain
security features for Blazor server forms. An attacker could possibly
use this issue to bypass validation, which could trigger unintended
actions. (CVE-2023-36558)

Piotr Bazydlo discovered that .NET did not properly handle untrusted
URIs provided to System.Net.WebRequest.Create. An attacker could possibly
use this issue to inject arbitrary commands to backend FTP servers.
(CVE-2023-36049)

Update instructions:

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

Ubuntu 23.10:
   aspnetcore-runtime-6.0          6.0.125-0ubuntu1~23.10.1
   aspnetcore-runtime-7.0          7.0.114-0ubuntu1~23.10.1
   aspnetcore-runtime-8.0          8.0.0-0ubuntu1~23.10.1
   dotnet-host                     6.0.125-0ubuntu1~23.10.1
   dotnet-host-7.0                 7.0.114-0ubuntu1~23.10.1
   dotnet-host-8.0                 8.0.0-0ubuntu1~23.10.1
   dotnet-hostfxr-6.0              6.0.125-0ubuntu1~23.10.1
   dotnet-hostfxr-7.0              7.0.114-0ubuntu1~23.10.1
   dotnet-hostfxr-8.0              8.0.0-0ubuntu1~23.10.1
   dotnet-runtime-6.0              6.0.125-0ubuntu1~23.10.1
   dotnet-runtime-7.0              7.0.114-0ubuntu1~23.10.1
   dotnet-runtime-8.0              8.0.0-0ubuntu1~23.10.1
   dotnet-sdk-6.0                  6.0.125-0ubuntu1~23.10.1
   dotnet-sdk-7.0                  7.0.114-0ubuntu1~23.10.1
   dotnet-sdk-8.0                  8.0.100-0ubuntu1~23.10.1
   dotnet6                         6.0.125-0ubuntu1~23.10.1
   dotnet7                         7.0.114-0ubuntu1~23.10.1
   dotnet8                         8.0.100-8.0.0-0ubuntu1~23.10.1

Ubuntu 23.04:
   aspnetcore-runtime-6.0          6.0.125-0ubuntu1~23.04.1
   aspnetcore-runtime-7.0          7.0.114-0ubuntu1~23.04.1
   dotnet-host                     6.0.125-0ubuntu1~23.04.1
   dotnet-host-7.0                 7.0.114-0ubuntu1~23.04.1
   dotnet-hostfxr-6.0              6.0.125-0ubuntu1~23.04.1
   dotnet-hostfxr-7.0              7.0.114-0ubuntu1~23.04.1
   dotnet-runtime-6.0              6.0.125-0ubuntu1~23.04.1
   dotnet-runtime-7.0              7.0.114-0ubuntu1~23.04.1
   dotnet-sdk-6.0                  6.0.125-0ubuntu1~23.04.1
   dotnet-sdk-7.0                  7.0.114-0ubuntu1~23.04.1
   dotnet6                         6.0.125-0ubuntu1~23.04.1
   dotnet7                         7.0.114-0ubuntu1~23.04.1

Ubuntu 22.04 LTS:
   aspnetcore-runtime-6.0          6.0.125-0ubuntu1~22.04.1
   aspnetcore-runtime-7.0          7.0.114-0ubuntu1~22.04.1
   dotnet-host                     6.0.125-0ubuntu1~22.04.1
   dotnet-host-7.0                 7.0.114-0ubuntu1~22.04.1
   dotnet-hostfxr-6.0              6.0.125-0ubuntu1~22.04.1
   dotnet-hostfxr-7.0              7.0.114-0ubuntu1~22.04.1
   dotnet-runtime-6.0              6.0.125-0ubuntu1~22.04.1
   dotnet-runtime-7.0              7.0.114-0ubuntu1~22.04.1
   dotnet-sdk-6.0                  6.0.125-0ubuntu1~22.04.1
   dotnet-sdk-7.0                  7.0.114-0ubuntu1~22.04.1
   dotnet6                         6.0.125-0ubuntu1~22.04.1
   dotnet7                         7.0.114-0ubuntu1~22.04.1

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

References:
   https://ubuntu.com/security/notices/USN-6480-1
   CVE-2023-36049, CVE-2023-36558

Package Information:
https://launchpad.net/ubuntu/+source/dotnet6/6.0.125-0ubuntu1~23.10.1
https://launchpad.net/ubuntu/+source/dotnet7/7.0.114-0ubuntu1~23.10.1
https://launchpad.net/ubuntu/+source/dotnet8/8.0.100-8.0.0-0ubuntu1~23.10.1
https://launchpad.net/ubuntu/+source/dotnet6/6.0.125-0ubuntu1~23.04.1
https://launchpad.net/ubuntu/+source/dotnet7/7.0.114-0ubuntu1~23.04.1
https://launchpad.net/ubuntu/+source/dotnet6/6.0.125-0ubuntu1~22.04.1
https://launchpad.net/ubuntu/+source/dotnet7/7.0.114-0ubuntu1~22.04.1