The operating system must provide a warning when allocated audit record storage volume reaches an organization-defined percentage of maximum audit record storage capacity.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-51499	OSX8-00-00305	SV-65709r1_rule		Medium

Description
It is critical for the appropriate personnel to be aware if a system is at risk of failing to process audit logs as required. Audit processing failures include, software/hardware errors, failures in the audit capturing mechanisms, and audit storage capacity being reached or exceeded. If audit log capacity were to be exceeded then events that subsequently occur will not be recorded.

STIG	Date
Apple OS X 10.8 (Mountain Lion) Workstation STIG	2015-02-10

Details

Check Text ( C-53843r1_chk )
The check displays the "% free" to leave available for the system. The audit system will not write logs if the volume has less than this percentage of free disk space To view the current setting, run the following command: sudo grep minfree /etc/security/audit_control | awk -F: '{ print $2 }' If this returns no results, or an incorrect setting for the organization, this is a finding.

Fix Text (F-56303r1_fix)
To set the value for "minfree" in the "audit_control" configuration file, run the following command: sudo sed -i.bak 's/.*minfree.*/minfree:10/' /etc/security/audit_control; sudo audit -s