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

NixOS system configuration file directories must have a mode of "0755" or less permissive.

DISA Rule

SV-268121r1131046_rule

Vulnerability Number

V-268121

Group Title

SRG-OS-000063-GPOS-00032

Rule Version

ANIX-00-000670

Severity

CAT II

CCI(s)

• CCI-000171 - Allow organization-defined personnel or roles to select the event types that are to be logged by specific components of the system.

Weight

10

Fix Recommendation

Update the NixOS config, typically stored either in /etc/nixos/configuration.nix or /etc/nixos/flake.nix, to use a mode of 755 or less for directories under /etc/audit.

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

Check Contents

Verify that the NixOS audit configuration directories have a mode of "755" or less permissive with the following commands:

$ sudo find -L /etc/audit -type d -exec stat -L -c "%a %n" {} \;

755 /etc/audit

If the audit configuration files have a mode more permissive than "755", this is a finding.

Vulnerability Number

V-268121

Documentable

False

Rule Version

ANIX-00-000670

Severity Override Guidance

Verify that the NixOS audit configuration directories have a mode of "755" or less permissive with the following commands:

$ sudo find -L /etc/audit -type d -exec stat -L -c "%a %n" {} \;

755 /etc/audit

If the audit configuration files have a mode more permissive than "755", this is a finding.

Check Content Reference

M

Target Key

5658