NixOS must take action when allocated audit record storage volume reaches 75 percent of the repository maximum audit record storage capacity.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-268103 | ANIX-00-000420 | SV-268103r1039197_rule | Medium |
| Description |
| If security personnel are not notified immediately when storage volume reaches 75 percent utilization, they are unable to plan for audit record storage capacity expansion. |
| STIG | Date |
| Anduril NixOS Security Technical Implementation Guide | 2024-10-25 |
Details
| Check Text (C-72027r1039195_chk) |
| Verify NixOS takes action when allocated audit record storage volume reaches 75 percent of the repository maximum audit record storage capacity with the following commands: $ sudo grep -w space_left /etc/audit/auditd.conf space_left = 25% If the value of the "space_left" keyword is not set to "25%" or if the line is commented out, this is a finding. |
| Fix Text (F-71930r1039196_fix) |
| Configure the operating system to initiate an action to notify the system administrator (SA) and information system security officer (ISSO) (at a minimum) when allocated audit record storage volume reaches 75 percent of the repository maximum audit record storage. Add or update the 'environment.etc."audit/auditd.conf".text' configuration in /etc/nixos/configuration.nix to include the following: environment.etc."audit/auditd.conf".text = [ '' space_left = 25% '' ]; Rebuild the NixOS configuration with the following command: $ sudo nixos-rebuild switch |