NixOS must require users to reauthenticate for privilege escalation.

Without reauthentication, users may access resources or perform tasks for which they do not have authorization.

When operating systems provide the capability to escalate a functional capability, it is critical the user reauthenticate.

Verify NixOS enforces reauthentication with sudo with the following command:

$ sudo grep timestamp_timeout /etc/sudoers

Defaults timestamp_timeout=0

If "timestamp_timeout" is greater than 0, is commented out, or is missing, this is a finding.

Configure NixOS to enforce reauthentication with sudo.

Add the following Nix code to the NixOS Configuration, usually located in /etc/nixos/configuration.nix or /etc/nixos/flake.nix:

security.sudo.extraConfig = '' Defaults timestamp_timeout=0 '';

Rebuild and switch to the new NixOS configuration: $ sudo nixos-rebuild switch