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id: "AU-09(01)" title: "Hardware Write-once Media" family: "AU" family_name: "Audit and Accountability" sort_id: "au-09.01" priority: "P2" implementation_level: "system" parent: "AU-09" enhancement: True

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Statement

Write audit trails to hardware-enforced, write-once media.

Guidance

Writing audit trails to hardware-enforced, write-once media applies to the initial generation of audit trails (i.e., the collection of audit records that represents the information to be used for detection, analysis, and reporting purposes) and to the backup of those audit trails. Writing audit trails to hardware-enforced, write-once media does not apply to the initial generation of audit records prior to being written to an audit trail. Write-once, read-many (WORM) media includes Compact Disc-Recordable (CD-R), Blu-Ray Disc Recordable (BD-R), and Digital Versatile Disc-Recordable (DVD-R). In contrast, the use of switchable write-protection media, such as tape cartridges, Universal Serial Bus (USB) drives, Compact Disc Re-Writeable (CD-RW), and Digital Versatile Disc-Read Write (DVD-RW) results in write-protected but not write-once media.

Assessment Objective

audit trails are written to hardware-enforced, write-once media.

Audit and accountability policy

system security plan

privacy plan

access control policy and procedures

procedures addressing protection of audit information

system design documentation

system hardware settings

system configuration settings and associated documentation

system storage media

system audit records

other relevant documents or records

Organizational personnel with audit and accountability responsibilities

organizational personnel with information security and privacy responsibilities

system/network administrators

system developers

System media storing audit trails