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V-275682

CAT III (Low)

Ubuntu OS 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.

Rule ID

SV-275682r1148096_rule

STIG

Riverbed NetIM OS Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-001855

Discussion

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.

Check Content

Verify Ubuntu OS 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

Configure Ubuntu OS 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.