STIGQter STIGQter: STIG Summary: Anduril NixOS Security Technical Implementation Guide Version: 1 Release: 2 Benchmark Date: 01 Oct 2025:

NixOS must prevent the use of dictionary words for passwords.

DISA Rule

SV-268169r1131144_rule

Vulnerability Number

V-268169

Group Title

SRG-OS-000480-GPOS-00225

Rule Version

ANIX-00-001860

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Configure NixOS to check password change attempts against a dictionary.

Add the following Nix code to the NixOS Configuration, usually located in /etc/nixos/configuration.nix or /etc/nixos/flake.nix:

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

Rebuild and switch to the new NixOS configuration:
$ sudo nixos-rebuild switch

Check Contents

Verify NixOS prevents the use of dictionary words for passwords with the following command:

$ grep dictcheck /etc/security/pwquality.conf

dictcheck=1

If the value of "ocredit" is a positive number or is commented out, this is a finding.

Vulnerability Number

V-268169

Documentable

False

Rule Version

ANIX-00-001860

Severity Override Guidance

Verify NixOS prevents the use of dictionary words for passwords with the following command:

$ grep dictcheck /etc/security/pwquality.conf

dictcheck=1

If the value of "ocredit" is a positive number or is commented out, this is a finding.

Check Content Reference

M

Target Key

5658