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

NixOS must prevent the installation of patches, service packs, device drivers, or operating system components without verification they have been digitally signed using a certificate that is recognized and approved by the organization.

DISA Rule

SV-268154r1131111_rule

Vulnerability Number

V-268154

Group Title

SRG-OS-000366-GPOS-00153

Rule Version

ANIX-00-001480

Severity

CAT I

CCI(s)

• CCI-003992 - Prevent the installation of organization-defined software and firmware components without verification that the component has been digitally signed using a certificate that is recognized and approved by the organization.

Weight

10

Fix Recommendation

Configure NixOS to require signatures.

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

nix.settings.require-sigs = true;

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

Check Contents

Verify NixOS prevents installations that have not been digitally signed with the following command:

$ grep -R require-sigs /etc/nix/nix.conf

require-sigs = true

If "require-sigs" is not set to "true" or is missing, this is a finding.

Vulnerability Number

V-268154

Documentable

False

Rule Version

ANIX-00-001480

Severity Override Guidance

Verify NixOS prevents installations that have not been digitally signed with the following command:

$ grep -R require-sigs /etc/nix/nix.conf

require-sigs = true

If "require-sigs" is not set to "true" or is missing, this is a finding.

Check Content Reference

M

Target Key

5658