|AU-12 (1) System-Wide / Time-Correlated Audit Trail ||HIGH |
Audit trails are time-correlated if the time stamps in the individual audit records can be reliably related to the time stamps in other audit records to achieve a time ordering of the records within organizational tolerances.
The information system compiles audit records from Assignment: organization-defined information system components into a system-wide (logical or physical) audit trail that is time-correlated to within Assignment: organization-defined level of tolerance for relationship between time stamps of individual records in the audit trail.
|AU-12 (2) Standardized Formats || |
Audit information that is normalized to common standards promotes interoperability and exchange of such information between dissimilar devices and information systems. This facilitates production of event information that can be more readily analyzed and correlated. Standard formats for audit records include, for example, system log records and audit records compliant with Common Event Expressions (CEE). If logging mechanisms within information systems do not conform to standardized formats, systems may convert individual audit records into standardized formats when compiling system-wide audit trails.
The information system produces a system-wide (logical or physical) audit trail composed of audit records in a standardized format.
|AU-12 (3) Changes By Authorized Individuals ||HIGH |
This control enhancement enables organizations to extend or limit auditing as necessary to meet organizational requirements. Auditing that is limited to conserve information system resources may be extended to address certain threat situations. In addition, auditing may be limited to a specific set of events to facilitate audit reduction, analysis, and reporting. Organizations can establish time thresholds in which audit actions are changed, for example, near real-time, within minutes, or within hours.
The information system provides the capability for Assignment: organization-defined individuals or roles to change the auditing to be performed on Assignment: organization-defined information system components based on Assignment: organization-defined selectable event criteria within Assignment: organization-defined time thresholds.