What This Objective Requires
AC.L2-3.1.1[f] focuses on verifying that access restrictions you define in policy and procedures are actually implemented at the system configuration level. This means assessors will look at real system settings — such as user directory permissions, file system access control lists (ACLs), group policies, and application roles — to confirm that only authorized users have access to systems that handle Controlled Unclassified Information (CUI).
This check goes beyond documentation. Even if your policies are sound, a misconfiguration could leave access improperly granted. This objective ensures technical enforcement matches written intent.
Why System-Level Verification Matters
Policies and procedures are important, but without system-level enforcement, they do not actually protect sensitive resources. Misalignments between documented access rights and configured permissions are a common gap during compliance assessments.
Verifying access restrictions at the configuration layer helps ensure your environment’s actual permissions reflect your security design and business requirements. It also improves your ability to detect and correct inconsistencies before they become security incidents.
How to Verify Access Restrictions Technically
To satisfy AC.L2-3.1.1[f], review access configurations across key systems:
- Examine user accounts and group memberships in Active Directory or local IAM systems.
- Review file system ACLs to see who can read, write, or execute specific resources.
- Check application permissions and role assignments for internal and third-party software.
- Remove or restrict access for disabled, terminated, generic, or over-privileged accounts.
- Use identity governance or access review tooling to validate configurations against documented roles and responsibilities.
These reviews should be repeatable and documented so that you can show an assessor that configurations were evaluated and discrepancies remedied.
Access Restriction Verification Table
| Area | What to Verify | Example Evidence | Typical Tools |
|---|---|---|---|
| User directories | Group memberships, role assignments | Screenshots or exports of directory policies | Active Directory, Azure AD, LDAP |
| File system ACLs | Access rights on sensitive folders and files | ACL exports or permissions summaries | Windows ACL tools, Linux getfacl |
| Application permissions | Role assignments and permission sets | Permission matrix or application screenshots | SaaS admin consoles, database role exports |
| Access review logs | Records of recent access validation | Review reports, ticket records | IAM governance tools, GRC platforms |
| Orphaned/legacy accounts | Disabled or unused accounts with access | Account status reports | Directory queries, audit logs |
Evidence Assessors Commonly Expect
Assessors typically expect screenshots or exports of system configuration settings that show access permissions. This includes user and group listings, file ACLs, application role assignments, and evidence that disabled or unnecessary accounts have been removed or restricted.
They may also look for records of periodic access reviews and logs of recent account changes showing that configurations are actively maintained and aligned with documented access control requirements.
Common Gaps to Avoid
Common gaps include having policies that restrict access on paper, but system configurations that still allow broad access. Another frequent issue is the presence of legacy, generic, or orphaned accounts that retain access despite no longer being needed.
Failing to regularly review and update system configurations can lead to unnoticed privilege creep and increase risk over time.
How Cuick Trac Supports This Objective
Cuick Trac helps teams verify and enforce system configuration access controls by centralizing identity and permission data, providing visibility into who has access where, and supporting review workflows that can be exported as assessment evidence.
This visibility helps ensure technical enforcement aligns with policy intent, reduces misconfigurations, and strengthens both security and compliance readiness.
FAQ
What does AC.L2-3.1.1[f] require?
It requires verifying that access restrictions defined in policy and procedures are actually enforced through system configurations.
Where do assessors check access restrictions?
Assessors check system settings including directories, file ACLs, group policies, and application permissions to confirm only authorized users have access.
What evidence demonstrates compliance?
Typical evidence includes screenshots of configurations, access management reports, and records of recent access reviews and changes.