DISA STIGS Viewer

NixOS must enforce password complexity by requiring that at least one numeric character be used.

Overview

Finding ID Version Rule ID IA Controls Severity
V-268128 ANIX-00-000750 SV-268128r1039272_rule   Medium
Description
Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks.
STIG Date
Anduril NixOS Security Technical Implementation Guide 2024-10-25

Details

Check Text (C-72052r1039270_chk)
Verify NixOS enforces password complexity by requiring at least one numeric character with the following command:

$ grep dcredit /etc/security/pwquality.conf

dcredit=-1

If the value of "dcredit" is a positive number or is commented out, this is a finding.
Fix Text (F-71955r1039271_fix)
Configure NixOS to enforce password complexity.

Add/modify /etc/nixos/configuration.nix to include the following lines:

environment.etc."/security/pwquality.conf".text = ''
dcredit=-1
'';

Rebuild the system with the following command:

$ sudo nixos-rebuild switch