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V-268110

CAT II (Medium)

NixOS audit daemon must generate logs that are group-owned by root.

Rule ID

SV-268110r1131025_rule

STIG

Anduril NixOS Security Technical Implementation Guide

Version

V1R2

CCIs

CCI-000162, CCI-001314

Discussion

Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the NixOS system or platform. Additionally, Personally Identifiable Information (PII) and operational information must not be revealed through error messages to unauthorized personnel or their designated representatives. The structure and content of error messages must be carefully considered by the organization and development team. The extent to which the information system is able to identify and handle error conditions is guided by organizational policy and operational requirements. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000206-GPOS-00084

Check Content

Verify the audit daemon is configured to generate logs that are group-owned by root with the following command:

$ sudo grep log_group /etc/audit/auditd.conf

log_group = root

If the audit daemon is not configured to generate logs that are group-owned by "root", this is a finding.

Fix Text

Configure the audit daemon to generate logs that are group-owned by root.

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

 environment.etc."audit/auditd.conf".text = [
  ''
   log_group = root
  ''
 ];

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