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NixOS must take action when allocated audit record storage volume reaches 75 percent of the repository maximum audit record storage capacity.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-268103ANIX-00-000420SV-268103r1131008_ruleCCI-000139medium
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.
STIGDate
Anduril NixOS Security Technical Implementation Guide2025-08-19

Related Frameworks

1 mapping across 4 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

MON-05Response To Event Log Processing Failures
1.00
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (20) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-2(4)Automated Audit Actions
1.00
AU-10Non-repudiation
1.00
AU-12Audit Record Generation
1.00
AU-12(1)System-wide and Time-correlated Audit Trail
1.00
AU-14(1)System Start-up
1.00
AU-4(1)Transfer to Alternate Storage
1.00
AU-5Response to Audit Logging Process Failures
1.00
AU-5(1)Storage Capacity Warning
1.00
AU-5(2)Real-time Alerts
1.00
AU-6(4)Central Review and Analysis
1.00

+10 more (top 10 by confidence shown)

NIST 800-1710 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

3.3.4
1.00
CCI1 mapping
CCI-000139
1.00

Details

Check Text (C-268103r1131008_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-71930r1131007_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 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 = [ '' space_left = 25% '' ]; Rebuild and switch to the new NixOS configuration: $ sudo nixos-rebuild switch