Check: AOSX-09-000305
Apple OS X 10.9 Workstation STIG:
AOSX-09-000305
(in version v1 r2)
Title
The operating system must provide an immediate warning to the SA and ISSO (at a minimum) when allocated audit record storage volume reaches 75% of repository maximum audit record storage capacity. (Cat II impact)
Discussion
The audit service must be configured to require a minimum percentage of free disk space in order to run. This ensures that audit will notify the administrator that action is required to free up more disk space for audit logs. When minfree is set to 25%, security personnel are notified immediately when the storage volume is 75% full and are able to plan for audit record storage capacity expansion.
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 If this returns no results, or does not contain 25, this is a finding.
Fix Text
Edit the /etc/security/audit_control file, and change the value for 'minfree' to 25. Use the following command to set the 'minfree' value to '25%': sudo sed -i.bak 's/.*minfree.*/minfree:25/' /etc/security/audit_control; sudo audit -s A text editor may also be used to implement the required update to the /etc/security/audit_control file.
Additional Identifiers
Rule ID: SV-72753r1_rule
Vulnerability ID: V-58323
Group Title:
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-001855 |
The information system provides a warning to organization-defined personnel, roles, and/or locations within an organization-defined time period when allocated audit record storage volume reaches an organization-defined percentage of repository maximum audit record storage capacity. |
Controls
Number | Title |
---|---|
AU-5 (1) |
Audit Storage Capacity |