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

For PKI-based authentication, NixOS must implement a local cache of revocation data to support path discovery and validation in case of the inability to access revocation information via the network.

DISA Rule

SV-268179r1131166_rule

Vulnerability Number

V-268179

Group Title

SRG-OS-000384-GPOS-00167

Rule Version

ANIX-00-002060

Severity

CAT II

CCI(s)

• CCI-004068 - For public key-based authentication, implement a local cache of revocation data to support path discovery and validation.

Weight

10

Fix Recommendation

Configure NixOS, for PKI-based authentication, to use local revocation data when unable to access the network to obtain it remotely.

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

security.pam.p11.enable = true;
environment.etc."pam_pkcs11/pam_pkcs11.conf".text = ''
cert_policy = ca,signature,ocsp_on, crl_auto;
'';

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

Check Contents

Verify NixOS, for PKI-based authentication, uses local revocation data when unable to access the network to obtain it remotely with the following command:

$ grep cert_policy /etc/pam_pkcs11/pam_pkcs11.conf

cert_policy = ca,signature,ocsp_on, crl_auto;

If the cert_policy does not contain the options in the example output, this is a finding.

Vulnerability Number

V-268179

Documentable

False

Rule Version

ANIX-00-002060

Severity Override Guidance

Verify NixOS, for PKI-based authentication, uses local revocation data when unable to access the network to obtain it remotely with the following command:

$ grep cert_policy /etc/pam_pkcs11/pam_pkcs11.conf

cert_policy = ca,signature,ocsp_on, crl_auto;

If the cert_policy does not contain the options in the example output, this is a finding.

Check Content Reference

M

Target Key

5658