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

From Apple OS X 10.8 (Mountain Lion) Workstation STIG

Associated with: CCI-000143

SV-65709r1_rule The operating system must provide a warning when allocated audit record storage volume reaches an organization-defined percentage of maximum audit record storage capacity.

Vulnerability discussion

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.

Check content

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

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

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