Ubuntu 22.04 LTS must immediately notify the system administrator (SA) and information system security officer (ISSO) when the audit record storage volume reaches 25 percent remaining of the allocated capacity.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-260596	UBTU-22-653040	SV-260596r971542_rule	CCI-001855	low
Description
If security personnel are not notified immediately when storage volume reaches 25 percent remaining of the allocated capacity, they are unable to plan for audit record storage capacity expansion.
STIG			Date
Canonical Ubuntu 22.04 LTS Security Technical Implementation Guide			2025-05-16

Details

Check Text (C-260596r971542_chk)

Verify Ubuntu 22.04 LTS is configured to notify the SA and ISSO when the audit record storage volume reaches 25 percent remaining of the allocated capacity by using the following command: $ sudo grep -i space_left /etc/audit/auditd.conf space_left = 25% space_left_action = email If "space_left" is set to a value less than "25%", is commented out, or is missing, this is a finding. If "space_left_action" is not set to "email", is commented out, or is missing, this is a finding. Note: If the "space_left_action" is set to "exec", the system executes a designated script. If this script informs the SA of the event, this is not a finding.

Fix Text (F-64233r953600_fix)

Configure Ubuntu 22.04 LTS to notify the SA and ISSO when the audit record storage volume reaches 25 percent remaining of the allocated capacity. Add or modify the following lines in the "/etc/audit/auditd.conf " file: space_left = 25% space_left_action = email Restart the "auditd" service for the changes to take effect: $ sudo systemctl restart auditd.service Note: If the "space_left_action" parameter is set to "exec", ensure the command being executed notifies the SA and ISSO.