Title

NixOS must require users to reauthenticate when changing roles. (Cat II impact)

Discussion

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.

Check Content

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.

Fix Text

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

Additional Identifiers

Rule ID: SV-268156r1131116_rule

Vulnerability ID: V-268156

Group Title: SRG-OS-000480-GPOS-00227

Expert Comments

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