| name | AC-20(2)_portable-storage-devices-restricted-use |
| description | Restrict the use of organization-controlled portable storage devices by authorized individuals on external systems using [organization-defined]. |
| category | authorization |
| version | 5.2.0 |
| author | cyberstrike-official |
| tags | ["nist","sp800-53","rev5","ac-20-2","ac","enhancement"] |
| tech_stack | ["aws","azure","gcp","linux","windows"] |
| cwe_ids | ["CWE-284"] |
| chains_with | ["MP-7","SC-41"] |
| prerequisites | ["AC-20"] |
| severity_boost | {"MP-7":"Chain with MP-7 for comprehensive security coverage","SC-41":"Chain with SC-41 for comprehensive security coverage"} |
AC-20(2) Portable Storage Devices — Restricted Use
Enhancement of: AC-20
High-Level Description
Family: Access Control (AC)
Framework: NIST SP 800-53 Rev 5
Limits on the use of organization-controlled portable storage devices in external systems include restrictions on how the devices may be used and under what conditions the devices may be used.
What to Check
How to Test
Step 1: Review Documentation
Examine the System Security Plan (SSP) and related artifacts for AC-20(2) 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 IAM policies and access controls | cloud_audit_iam_policies |
| hackbrowser-mcp | Test web application access controls | browser_auth_test |
Remediation Guide
Control Statement
Restrict the use of organization-controlled portable storage devices by authorized individuals on external systems using [organization-defined].
Implementation Guidance
Limits on the use of organization-controlled portable storage devices in external systems include restrictions on how the devices may be used and under what conditions the devices may be used.
Risk Assessment
