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

NixOS must provide the capability for users to directly initiate a session lock for all connection types.

DISA Rule

SV-268087r1130972_rule

Vulnerability Number

V-268087

Group Title

SRG-OS-000030-GPOS-00011

Rule Version

ANIX-00-000120

Severity

CAT II

CCI(s)

• CCI-000057 - The information system initiates a session lock after the organization-defined time period of inactivity.
• CCI-000056 - Retain the device lock until the user reestablishes access using established identification and authentication procedures.
• CCI-000060 - Conceal, via the device lock, information previously visible on the display with a publicly viewable image.

Weight

10

Fix Recommendation

Configure NixOS to have a package that allows user to lock session.

Update the NixOS config, typically stored either in /etc/nixos/configuration.nix or /etc/nixos/flake.nix:

environment.systemPackages = [
pkgs.vlock
];

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

Check Contents

Verify the NixOS operating system has the "vlock" package installed by running the following command:

$ which vlock
/run/current-system/sw/bin/vlock

If the "vlock" package is not installed, this is a finding.

Vulnerability Number

V-268087

Documentable

False

Rule Version

ANIX-00-000120

Severity Override Guidance

Verify the NixOS operating system has the "vlock" package installed by running the following command:

$ which vlock
/run/current-system/sw/bin/vlock

If the "vlock" package is not installed, this is a finding.

Check Content Reference

M

Target Key

5658