NixOS must require users to reauthenticate when changing roles.

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

When operating systems provide the capability to change security roles, it is critical the user reauthenticate.

Verify NixOS requires users to reauthenticate when changing roles with the following command:

$ grep -iR "%wheel" /etc/sudoers

%wheel ALL=(ALL:ALL) SETENV: ALL

If the returned line contains "NOPASSWD", this is a finding.

Configure NixOS to require reauthentication for sudo.

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

security.sudo.wheelNeedsPassword = true;

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