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AC-3—Access Enforcement

LI-SaaS
Low
Moderate
High

>Control Description

Enforce approved authorizations for logical access to information and system resources in accordance with applicable access control policies.

>FedRAMP Baseline Requirements

No FedRAMP-specific parameter values or requirements for this baseline.

>Discussion

Access control policies control access between active entities or subjects (i.e., users or processes acting on behalf of users) and passive entities or objects (i.e., devices, files, records, domains) in organizational systems. In addition to enforcing authorized access at the system level and recognizing that systems can host many applications and services in support of mission and business functions, access enforcement mechanisms can also be employed at the application and service level to provide increased information security and privacy. In contrast to logical access controls that are implemented within the system, physical access controls are addressed by the controls in the Physical and Environmental Protection (PE) family.

>Cross-Framework Mappings

SCF

IAC-20
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>Programmatic Queries

Beta

Related Services

IAM Policies
S3 Bucket Policies
Resource Policies

CLI Commands

List attached user policies
aws iam list-attached-user-policies --user-name USERNAME
Get policy document
aws iam get-policy-version --policy-arn ARN --version-id v1
Check S3 bucket policy
aws s3api get-bucket-policy --bucket BUCKET_NAME
Simulate policy evaluation
aws iam simulate-principal-policy --policy-source-arn ARN --action-names ACTION
Open AWS ConsoleDocumentation

>Relevant Technologies

Technology-specific guidance with authoritative sources and verification commands.

OktaGoogle WorkspaceAWSMicrosoft AzureGoogle Cloud PlatformMicrosoft Entra IDZscaler Zero Trust ExchangePalo Alto Networks

>Assessment Interview Topics

Questions assessors commonly ask

Process & Governance:

  • •What formal policies and procedures govern the implementation of AC-3 (Access Enforcement)?
  • •Who are the designated roles responsible for implementing, maintaining, and monitoring AC-3?
  • •How frequently is the AC-3 policy reviewed and updated, and what triggers policy changes?
  • •What training or awareness programs ensure personnel understand their responsibilities related to AC-3?

Technical Implementation:

  • •Describe the specific technical mechanisms or controls used to enforce AC-3 requirements.
  • •What automated tools, systems, or technologies are deployed to implement AC-3?
  • •How is AC-3 integrated into your system architecture and overall security posture?
  • •What configuration settings, parameters, or technical specifications enforce AC-3 requirements?

Evidence & Documentation:

  • •What documentation demonstrates the complete implementation of AC-3?
  • •What audit logs, records, reports, or monitoring data validate AC-3 compliance?
  • •Can you provide evidence of periodic reviews, assessments, or testing of AC-3 effectiveness?
  • •What artifacts would you present during a FedRAMP assessment to demonstrate AC-3 compliance?

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