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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.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-268154ANIX-00-001480SV-268154r1131111_ruleCCI-003992high
Description
Changes to any software components can have significant effects on the overall security of the operating system. This requirement ensures the software has not been tampered with and that it has been provided by a trusted vendor. Accordingly, patches, service packs, device drivers, or operating system components must be signed with a certificate recognized and approved by the organization. Verifying the authenticity of the software prior to installation validates the integrity of the patch or upgrade received from a vendor. This ensures the software has not been tampered with and that it has been provided by a trusted vendor. Self-signed certificates are disallowed by this requirement. The operating system should not have to verify the software again. This requirement does not mandate DOD certificates for this purpose; however, the certificate used to verify the software must be from an approved certificate authority (CA).
STIGDate
Anduril NixOS Security Technical Implementation Guide2025-08-19

Related Frameworks

1 mapping across 3 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

CHG-04.2Signed Components
0.50
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (8) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-2(10)Shared and Group Account Credential Change
1.00
CM-14Signed Components
1.00
CM-5(3)Signed Components
1.00
CM-7(5)Authorized Software — Allow-by-exception
1.00
IA-2(5)Individual Authentication with Group Authentication
1.00
SC-23Session Authenticity
1.00
SC-3Security Function Isolation
1.00
SI-2Flaw Remediation
1.00
CCI1 mapping
CCI-003992
1.00

Details

Check Text (C-268154r1131111_chk)

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.

Fix Text (F-71981r1131110_fix)

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