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 wheelneedspassword /etc/nixos/ /etc/nixos/configuration.nix:security.sudo.wheelNeedsPassword = true; If the returned line does not have a value of "true" or is commented out, this is a finding.

Fix Text

Configure NixOS to require reauthentication for sudo by editing the /etc/nixos/configuration.nix with the following: security.sudo.wheelNeedsPassword = true; Rebuild the system configuration with the following command: $ sudo nixos-rebuild switch

Additional Identifiers

Rule ID: SV-268156r1039539_rule

Vulnerability ID: V-268156

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

Expert Comments

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