| name | AU-5(1)_storage-capacity-warning |
| description | Provide a warning to [organization-defined] within [organization-defined] when allocated audit log storage volume reaches [organization-defined] of re |
| category | information-gathering |
| version | 5.2.0 |
| author | cyberstrike-official |
| tags | ["nist","sp800-53","rev5","au-5-1","au","enhancement"] |
| tech_stack | ["aws","azure","gcp","linux","windows"] |
| cwe_ids | ["CWE-778"] |
| chains_with | [] |
| prerequisites | ["AU-5"] |
| severity_boost | {} |
AU-5(1) Storage Capacity Warning
Enhancement of: AU-5
High-Level Description
Family: Audit and Accountability (AU)
Framework: NIST SP 800-53 Rev 5
Organizations may have multiple audit log storage repositories distributed across multiple system components with each repository having different storage volume capacities.
What to Check
How to Test
Step 1: Review Documentation
Examine the System Security Plan (SSP) and related artifacts for AU-5(1) implementation details. Verify the organization has documented how this control is satisfied.
Step 2: Validate Implementation
# For cloud environments, use cloud-audit-mcp tools
# For on-premises, review system configurations directly
# Example: Check if account management policies exist
grep -r "account.management\|access.control" /etc/security/ 2>/dev/null
Step 3: Test Operating Effectiveness
Verify the control is actively functioning, not just documented. Check logs, configurations, and operational evidence.
Tools
| Tool | Purpose | Usage |
|---|
| cloud-audit-mcp | Check logging configuration | cloud_audit_logging |
| AWS CLI | Review CloudTrail/CloudWatch | aws cloudtrail describe-trails |
Remediation Guide
Control Statement
Provide a warning to [organization-defined] within [organization-defined] when allocated audit log storage volume reaches [organization-defined] of repository maximum audit log storage capacity.
Implementation Guidance
Organizations may have multiple audit log storage repositories distributed across multiple system components with each repository having different storage volume capacities.
Risk Assessment
