Title

NixOS must use multifactor authentication for network access to privileged accounts. (Cat II impact)

Discussion

Without the use of multifactor authentication, the ease of access to privileged functions is greatly increased. Multifactor authentication requires using two or more factors to achieve authentication. Factors include: 1) something a user knows (e.g., password/PIN); 2) something a user has (e.g., cryptographic identification device, token); and 3) something a user is (e.g., biometric). A privileged account is defined as an information system account with authorizations of a privileged user. Network access is defined as access to an information system by a user (or a process acting on behalf of a user) communicating through a network (e.g., local area network, wide area network, or the internet). The DOD CAC with DOD-approved PKI is an example of multifactor authentication. Satisfies: SRG-OS-000105-GPOS-00052, SRG-OS-000106-GPOS-00053, SRG-OS-000107-GPOS-00054, SRG-OS-000108-GPOS-00055

Check Content

Verify NixOS has the packages required for multifactor authentication installed with the following command: $ grep -R pkgs.opencrypto /etc/nixos pkgs.opencryptoki If the "pkgs.opencryptoki" package is not installed, this is a finding.

Fix Text

Configure NixOS to have a package that enforces multifactor authentication installed. Add the following Nix code to the NixOS Configuration, usually located in /etc/nixos/configuration.nix: environment.systemPackages = [ pkgs.opencryptoki ]; Rebuild the NixOS configuration with the following command: $ sudo nixos-rebuild switch

Additional Identifiers

Rule ID: SV-268136r1039296_rule

Vulnerability ID: V-268136

Group Title: SRG-OS-000105-GPOS-00052

Expert Comments

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