AC-7(2)_purge-or-wipe-mobile-device

AC-7(2) Purge or Wipe Mobile Device

Enhancement of: AC-7

High-Level Description

Family: Access Control (AC) Framework: NIST SP 800-53 Rev 5

A mobile device is a computing device that has a small form factor such that it can be carried by a single individual; is designed to operate without a physical connection; possesses local, non-removable or removable data storage; and includes a self-contained power source. Purging or wiping the device applies only to mobile devices for which the organization-defined number of unsuccessful logons occurs. The logon is to the mobile device, not to any one account on the device. Successful logons to accounts on mobile devices reset the unsuccessful logon count to zero. Purging or wiping may be unnecessary if the information on the device is protected with sufficiently strong encryption mechanisms.

What to Check

• Verify AC-7(2) Purge or Wipe Mobile Device is documented in SSP
• Confirm control is operating effectively
• Review evidence of continuous monitoring for AC-7(2)
• Verify enhancement builds upon base control AC-7

How to Test

Step 1: Review Documentation

Examine the System Security Plan (SSP) and related artifacts for AC-7(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

Remediation Guide

Control Statement

Purge or wipe information from [organization-defined] based on [organization-defined] after [organization-defined] consecutive, unsuccessful device logon attempts.

Implementation Guidance

A mobile device is a computing device that has a small form factor such that it can be carried by a single individual; is designed to operate without a physical connection; possesses local, non-removable or removable data storage; and includes a self-contained power source. Purging or wiping the device applies only to mobile devices for which the organization-defined number of unsuccessful logons occurs. The logon is to the mobile device, not to any one account on the device. Successful logons to accounts on mobile devices reset the unsuccessful logon count to zero. Purging or wiping may be unnecessary if the information on the device is protected with sufficiently strong encryption mechanisms.

Risk Assessment

CWE Categories

References

• NIST SP 800-53 Rev 5 - AC-7(2)
• NIST SP 800-53A Rev 5 (Assessment Procedures)
• NIST SP 800-53 Rev 5 Full Catalog

Checklist

• Control documented in SSP
• Implementation evidence collected
• Operating effectiveness validated
• Continuous monitoring in place
• Related controls (AC-19, MP-5, MP-6) reviewed