NixOS must use multifactor authentication for network access to privileged accounts.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-268136	SRG-OS-000105-GPOS-00052	ANIX-00-000850	SV-268136r1039296_rule	2024-10-25	1

Description
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

Description

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

ℹ️ Check
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
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