Operational Best Practices for CMMC 2.0 Level 1

Conformance packs provide a general-purpose compliance framework designed to enable you to create security, operational or cost-optimization governance checks using managed or custom AWS Config rules and AWS Config remediation actions. Conformance Packs, as sample templates, are not designed to fully ensure compliance with a specific governance or compliance standard. You are responsible for making your own assessment of whether your use of the Services meets applicable legal and regulatory requirements.

The following provides a sample mapping between the Cybersecurity Maturity Model Certification (CMMC) 2.0 Level 1 and AWS managed Config rules. Each Config rule applies to a specific AWS resource, and relates to one or more CMMC 2.0 Level 1 controls. A CMMC 2.0 Level 1 control can be related to multiple Config rules. Refer to the table below for more detail and guidance related to these mappings.

Control ID	Control Description	AWS Config Rule	Guidance
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	access-keys-rotated	The credentials are audited for authorized devices, users, and processes by ensuring IAM access keys are rotated as specified by the organizational policy. Changing the access keys on a regular schedule is a security best practice. It shortens the period an access key is active and reduces the business impact if the keys are compromised. This rule requires an access key rotation value (Config Default: 90). The actual value should reflect your organization's policies.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	dms-replication-not-public	Manage access to the AWS Cloud by ensuring DMS replication instances cannot be publicly accessed. DMS replication instances can contain sensitive information and access control is required for such accounts.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	ebs-snapshot-public-restorable-check	Manage access to the AWS Cloud by ensuring EBS snapshots are not publicly restorable. EBS volume snapshots can contain sensitive information and access control is required for such accounts.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	ec2-imdsv2-check	Ensure the Instance Metadata Service Version 2 (IMDSv2) method is enabled to help protect access and control of Amazon Elastic Compute Cloud (Amazon EC2) instance metadata. The IMDSv2 method uses session-based controls. With IMDSv2, controls can be implemented to restrict changes to instance metadata.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	ec2-instance-no-public-ip	Manage access to the AWS Cloud by ensuring Amazon Elastic Compute Cloud (Amazon EC2) instances cannot be publicly accessed. Amazon EC2 instances can contain sensitive information and access control is required for such accounts.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	ec2-instance-profile-attached	EC2 instance profiles pass an IAM role to an EC2 instance. Attaching an instance profile to your instances can assist with least privilege and permissions management.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	elasticsearch-in-vpc-only	Manage access to the AWS Cloud by ensuring Amazon OpenSearch Service (OpenSearch Service) Domains are within an Amazon Virtual Private Cloud (Amazon VPC). An OpenSearch Service domain within an Amazon VPC enables secure communication between OpenSearch Service and other services within the Amazon VPC without the need for an internet gateway, NAT device, or VPN connection.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	emr-kerberos-enabled	The access permissions and authorizations can be managed and incorporated with the principles of least privilege and separation of duties, by enabling Kerberos for Amazon EMR clusters. In Kerberos, the services and the users that need to authenticate are known as principals. The principals exist within a Kerberos realm. Within the realm, a Kerberos server is known as the key distribution center (KDC). It provides a means for the principals to authenticate. The KDC authenticates by issuing tickets for authentication. The KDC maintains a database of the principals within its realm, their passwords, and other administrative information about each principal.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	emr-master-no-public-ip	Manage access to the AWS Cloud by ensuring Amazon EMR cluster master nodes cannot be publicly accessed. Amazon EMR cluster master nodes can contain sensitive information and access control is required for such accounts.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	iam-customer-policy-blocked-kms-actions	AWS Identity and Access Management (IAM) can help you incorporate the principles of least privilege and separation of duties with access permissions and authorizations, restricting policies from containing blocked actions on all AWS Key Management Service keys. Having more privileges than needed to complete a task may violate the principle of least privilege and separation of duties. This rule allows you to set the blockedActionsPatterns parameter. (AWS Foundational Security Best Practices value: kms:Decrypt, kms:ReEncryptFrom). The actual values should reflect your organization's policies
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	iam-group-has-users-check	AWS Identity and Access Management (IAM) can help you incorporate the principles of least privilege and separation of duties with access permissions and authorizations, by ensuring that IAM groups have at least one user. Placing users in groups based on their associated permissions or job function is one way to incorporate least privilege.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	iam-inline-policy-blocked-kms-actions	Ensure an AWS Identity and Access Management (IAM) user, IAM role or IAM group does not have an inline policy to allow blocked actions on all AWS Key Management Service keys. AWS recommends to use managed policies instead of inline policies. The managed policies allow reusability, versioning, rolling back, and delegating permissions management. This rule allows you to set the blockedActionsPatterns parameter. (AWS Foundational Security Best Practices value: kms:Decrypt, kms:ReEncryptFrom). The actual values should reflect your organization's policies.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	iam-no-inline-policy-check	Ensure an AWS Identity and Access Management (IAM) user, IAM role or IAM group does not have an inline policy to control access to systems and assets. AWS recommends to use managed policies instead of inline policies. The managed policies allow reusability, versioning and rolling back, and delegating permissions management.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	iam-policy-no-statements-with-admin-access	AWS Identity and Access Management (IAM) can help you incorporate the principles of least privilege and separation of duties with access permissions and authorizations, restricting policies from containing "Effect": "Allow" with "Action": "" over "Resource": "". Allowing users to have more privileges than needed to complete a task may violate the principle of least privilege and separation of duties.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	iam-policy-no-statements-with-full-access	Ensure IAM Actions are restricted to only those actions that are needed. Allowing users to have more privileges than needed to complete a task may violate the principle of least privilege and separation of duties.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	iam-root-access-key-check	Access to systems and assets can be controlled by checking that the root user does not have access keys attached to their AWS Identity and Access Management (IAM) role. Ensure that the root access keys are deleted. Instead, create and use role-based AWS accounts to help to incorporate the principle of least functionality.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	iam-user-group-membership-check	AWS Identity and Access Management (IAM) can help you restrict access permissions and authorizations, by ensuring users are members of at least one group. Allowing users more privileges than needed to complete a task may violate the principle of least privilege and separation of duties.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	iam-user-mfa-enabled	Enable this rule to restrict access to resources in the AWS Cloud. This rule ensures multi-factor authentication (MFA) is enabled for all users. MFA adds an extra layer of protection on top of sign-in credentials. Reduce the incidents of compromised accounts by requiring MFA for users.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	iam-user-no-policies-check	This rule ensures AWS Identity and Access Management (IAM) policies are attached only to groups or roles to control access to systems and assets. Assigning privileges at the group or the role level helps to reduce opportunity for an identity to receive or retain excessive privileges.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	iam-user-unused-credentials-check	AWS Identity and Access Management (IAM) can help you with access permissions and authorizations by checking for IAM passwords and access keys that are not used for a specified time period. If these unused credentials are identified, you should disable and/or remove the credentials, as this may violate the principle of least privilege. This rule requires you to set a value to the maxCredentialUsageAge (Config Default: 90). The actual value should reflect your organization's policies.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	restricted-ssh	Amazon Elastic Compute Cloud (Amazon EC2) Security Groups can help manage network access by providing stateful filtering of ingress and egress network traffic to AWS resources. Not allowing ingress (or remote) traffic from 0.0.0.0/0 to port 22 on your resources help you restricting remote access.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	ec2-instances-in-vpc	Deploy Amazon Elastic Compute Cloud (Amazon EC2) instances within an Amazon Virtual Private Cloud (Amazon VPC) to enable secure communication between an instance and other services within the amazon VPC, without requiring an internet gateway, NAT device, or VPN connection. All traffic remains securely within the AWS Cloud. Because of their logical isolation, domains that reside within an Amazon VPC have an extra layer of security when compared to domains that use public endpoints. Assign Amazon EC2 instances to an Amazon VPC to properly manage access.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	internet-gateway-authorized-vpc-only	Manage access to resources in the AWS Cloud by ensuring that internet gateways are only attached to authorized Amazon Virtual Private Cloud (Amazon VPC). Internet gateways allow bi-directional internet access to and from the Amazon VPC that can potentially lead to unauthorized access to Amazon VPC resources.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	lambda-function-public-access-prohibited	Manage access to resources in the AWS Cloud by ensuring AWS Lambda functions cannot be publicly accessed. Public access can potentially lead to degradation of availability of resources.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	lambda-inside-vpc	Deploy AWS Lambda functions within an Amazon Virtual Private Cloud (Amazon VPC) for a secure communication between a function and other services within the Amazon VPC. With this configuration, there is no requirement for an internet gateway, NAT device, or VPN connection. All the traffic remains securely within the AWS Cloud. Because of their logical isolation, domains that reside within an Amazon VPC have an extra layer of security when compared to domains that use public endpoints. To properly manage access, AWS Lambda functions should be assigned to a VPC.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	mfa-enabled-for-iam-console-access	Manage access to resources in the AWS Cloud by ensuring that MFA is enabled for all AWS Identity and Access Management (IAM) users that have a console password. MFA adds an extra layer of protection on top of sign-in credentials. By requiring MFA for users, you can reduce incidents of compromised accounts and keep sensitive data from being accessed by unauthorized users.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	rds-instance-public-access-check	Manage access to resources in the AWS Cloud by ensuring that Amazon Relational Database Service (Amazon RDS) instances are not public. Amazon RDS database instances can contain sensitive information, and principles and access control is required for such accounts.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	rds-snapshots-public-prohibited	Manage access to resources in the AWS Cloud by ensuring that Amazon Relational Database Service (Amazon RDS) instances are not public. Amazon RDS database instances can contain sensitive information and principles and access control is required for such accounts.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	redshift-cluster-public-access-check	Manage access to resources in the AWS Cloud by ensuring that Amazon Redshift clusters are not public. Amazon Redshift clusters can contain sensitive information and principles and access control is required for such accounts.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	restricted-common-ports	Manage access to resources in the AWS Cloud by ensuring common ports are restricted on Amazon Elastic Compute Cloud (Amazon EC2) security groups. Not restricting access to ports to trusted sources can lead to attacks against the availability, integrity and confidentiality of systems. This rule allows you to optionally set blockedPort1 - blockedPort5 parameters (Config Defaults: 20,21,3389,3306,4333). The actual values should reflect your organization's policies.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	root-account-hardware-mfa-enabled	Manage access to resources in the AWS Cloud by ensuring hardware MFA is enabled for the root user. The root user is the most privileged user in an AWS account. The MFA adds an extra layer of protection for sign-in credentials. By requiring MFA for the root user, you can reduce the incidents of compromised AWS accounts.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	root-account-mfa-enabled	Manage access to resources in the AWS Cloud by ensuring MFA is enabled for the root user. The root user is the most privileged user in an AWS account. The MFA adds an extra layer of protection for sign-in credentials. By requiring MFA for the root user, you can reduce the incidents of compromised AWS accounts.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	s3-account-level-public-access-blocks-periodic	Manage access to resources in the AWS Cloud by ensuring that Amazon Simple Storage Service (Amazon S3) buckets cannot be publicly accessed. This rule helps keeping sensitive data safe from unauthorized remote users by preventing public access. This rule allows you to optionally set the ignorePublicAcls (Config Default: True), blockPublicPolicy (Config Default: True), blockPublicAcls (Config Default: True), and restrictPublicBuckets parameters (Config Default: True). The actual values should reflect your organization's policies.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	s3-bucket-level-public-access-prohibited	Manage access to resources in the AWS Cloud by ensuring that Amazon Simple Storage Service (Amazon S3) buckets cannot be publicly accessed. This rule helps keeping sensitive data safe from unauthorized remote users by preventing public access at the bucket level.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	s3-bucket-policy-grantee-check	Manage access to the AWS Cloud by enabling s3_ bucket_policy_grantee_check. This rule checks that the access granted by the Amazon S3 bucket is restricted by any of the AWS principals, federated users, service principals, IP addresses, or Amazon Virtual Private Cloud (Amazon VPC) IDs that you provide.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	s3-bucket-public-read-prohibited	Manage access to resources in the AWS Cloud by only allowing authorized users, processes, and devices access to Amazon Simple Storage Service (Amazon S3) buckets. The management of access should be consistent with the classification of the data.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	s3-bucket-public-write-prohibited	Manage access to resources in the AWS Cloud by only allowing authorized users, processes, and devices access to Amazon Simple Storage Service (Amazon S3) buckets. The management of access should be consistent with the classification of the data.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	sagemaker-notebook-no-direct-internet-access	Manage access to resources in the AWS Cloud by ensuring that Amazon SageMaker notebooks do not allow direct internet access. By preventing direct internet access, you can keep sensitive data from being accessed by unauthorized users.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	secretsmanager-rotation-enabled-check	This rule ensures AWS Secrets Manager secrets have rotation enabled. Rotating secrets on a regular schedule can shorten the period a secret is active, and potentially reduce the business impact if the secret is compromised.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	secretsmanager-scheduled-rotation-success-check	This rule ensures that AWS Secrets Manager secrets have rotated successfully according to the rotation schedule. Rotating secrets on a regular schedule can shorten the period that a secret is active, and potentially reduce the business impact if it is compromised.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	ssm-document-not-public	Ensure AWS Systems Manager (SSM) documents are not public, as this may allow unintended access to your SSM documents. A public SSM document can expose information about your account, resources and internal processes.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	vpc-default-security-group-closed	Amazon Elastic Compute Cloud (Amazon EC2) security groups can help in the management of network access by providing stateful filtering of ingress and egress network traffic to AWS resources. Restricting all the traffic on the default security group helps in restricting remote access to your AWS resources.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	vpc-sg-open-only-to-authorized-ports	Manage access to resources in the AWS Cloud by ensuring common ports are restricted on Amazon Elastic Compute Cloud (Amazon EC2) Security Groups. Not restricting access on ports to trusted sources can lead to attacks against the availability, integrity and confidentiality of systems. By restricting access to resources within a security group from the internet (0.0.0.0/0) remote access can be controlled to internal systems.
AC.L1-3.1.1	Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).	opensearch-in-vpc-only	Manage access to the AWS Cloud by ensuring Amazon OpenSearch Service domains are within an Amazon Virtual Private Cloud (Amazon VPC). An Amazon OpenSearch Service domain within an Amazon VPC enables secure communication between Amazon OpenSearch Service and other services within the Amazon VPC without the need for an internet gateway, NAT device, or VPN connection.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	dms-replication-not-public	Manage access to the AWS Cloud by ensuring DMS replication instances cannot be publicly accessed. DMS replication instances can contain sensitive information and access control is required for such accounts.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	ebs-snapshot-public-restorable-check	Manage access to the AWS Cloud by ensuring EBS snapshots are not publicly restorable. EBS volume snapshots can contain sensitive information and access control is required for such accounts.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	ec2-imdsv2-check	Ensure the Instance Metadata Service Version 2 (IMDSv2) method is enabled to help protect access and control of Amazon Elastic Compute Cloud (Amazon EC2) instance metadata. The IMDSv2 method uses session-based controls. With IMDSv2, controls can be implemented to restrict changes to instance metadata.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	ec2-instance-no-public-ip	Manage access to the AWS Cloud by ensuring Amazon Elastic Compute Cloud (Amazon EC2) instances cannot be publicly accessed. Amazon EC2 instances can contain sensitive information and access control is required for such accounts.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	elasticsearch-in-vpc-only	Manage access to the AWS Cloud by ensuring Amazon OpenSearch Service (OpenSearch Service) Domains are within an Amazon Virtual Private Cloud (Amazon VPC). An OpenSearch Service domain within an Amazon VPC enables secure communication between OpenSearch Service and other services within the Amazon VPC without the need for an internet gateway, NAT device, or VPN connection.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	emr-kerberos-enabled	The access permissions and authorizations can be managed and incorporated with the principles of least privilege and separation of duties, by enabling Kerberos for Amazon EMR clusters. In Kerberos, the services and the users that need to authenticate are known as principals. The principals exist within a Kerberos realm. Within the realm, a Kerberos server is known as the key distribution center (KDC). It provides a means for the principals to authenticate. The KDC authenticates by issuing tickets for authentication. The KDC maintains a database of the principals within its realm, their passwords, and other administrative information about each principal.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	emr-master-no-public-ip	Manage access to the AWS Cloud by ensuring Amazon EMR cluster master nodes cannot be publicly accessed. Amazon EMR cluster master nodes can contain sensitive information and access control is required for such accounts.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	iam-no-inline-policy-check	Ensure an AWS Identity and Access Management (IAM) user, IAM role or IAM group does not have an inline policy to control access to systems and assets. AWS recommends to use managed policies instead of inline policies. The managed policies allow reusability, versioning and rolling back, and delegating permissions management.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	iam-password-policy	The identities and the credentials are issued, managed, and verified based on an organizational IAM password policy. They meet or exceed requirements as stated by NIST SP 800-63 and the AWS Foundational Security Best Practices standard for password strength. This rule allows you to optionally set RequireUppercaseCharacters (AWS Foundational Security Best Practices value: true), RequireLowercaseCharacters (AWS Foundational Security Best Practices value: true), RequireSymbols (AWS Foundational Security Best Practices value: true), RequireNumbers (AWS Foundational Security Best Practices value: true), MinimumPasswordLength (AWS Foundational Security Best Practices value: 14), PasswordReusePrevention (AWS Foundational Security Best Practices value: 24), and MaxPasswordAge (AWS Foundational Security Best Practices value: 90) for your IAM Password Policy. The actual values should reflect your organization's policies.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	iam-policy-no-statements-with-admin-access	AWS Identity and Access Management (IAM) can help you incorporate the principles of least privilege and separation of duties with access permissions and authorizations, restricting policies from containing "Effect": "Allow" with "Action": "" over "Resource": "". Allowing users to have more privileges than needed to complete a task may violate the principle of least privilege and separation of duties.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	iam-root-access-key-check	Access to systems and assets can be controlled by checking that the root user does not have access keys attached to their AWS Identity and Access Management (IAM) role. Ensure that the root access keys are deleted. Instead, create and use role-based AWS accounts to help to incorporate the principle of least functionality.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	iam-user-group-membership-check	AWS Identity and Access Management (IAM) can help you restrict access permissions and authorizations, by ensuring users are members of at least one group. Allowing users more privileges than needed to complete a task may violate the principle of least privilege and separation of duties.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	iam-user-mfa-enabled	Enable this rule to restrict access to resources in the AWS Cloud. This rule ensures multi-factor authentication (MFA) is enabled for all users. MFA adds an extra layer of protection on top of sign-in credentials. Reduce the incidents of compromised accounts by requiring MFA for users.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	iam-user-no-policies-check	This rule ensures AWS Identity and Access Management (IAM) policies are attached only to groups or roles to control access to systems and assets. Assigning privileges at the group or the role level helps to reduce opportunity for an identity to receive or retain excessive privileges.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	restricted-ssh	Amazon Elastic Compute Cloud (Amazon EC2) Security Groups can help manage network access by providing stateful filtering of ingress and egress network traffic to AWS resources. Not allowing ingress (or remote) traffic from 0.0.0.0/0 to port 22 on your resources help you restricting remote access.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	ec2-instances-in-vpc	Deploy Amazon Elastic Compute Cloud (Amazon EC2) instances within an Amazon Virtual Private Cloud (Amazon VPC) to enable secure communication between an instance and other services within the amazon VPC, without requiring an internet gateway, NAT device, or VPN connection. All traffic remains securely within the AWS Cloud. Because of their logical isolation, domains that reside within an Amazon VPC have an extra layer of security when compared to domains that use public endpoints. Assign Amazon EC2 instances to an Amazon VPC to properly manage access.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	internet-gateway-authorized-vpc-only	Manage access to resources in the AWS Cloud by ensuring that internet gateways are only attached to authorized Amazon Virtual Private Cloud (Amazon VPC). Internet gateways allow bi-directional internet access to and from the Amazon VPC that can potentially lead to unauthorized access to Amazon VPC resources.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	lambda-function-public-access-prohibited	Manage access to resources in the AWS Cloud by ensuring AWS Lambda functions cannot be publicly accessed. Public access can potentially lead to degradation of availability of resources.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	lambda-inside-vpc	Deploy AWS Lambda functions within an Amazon Virtual Private Cloud (Amazon VPC) for a secure communication between a function and other services within the Amazon VPC. With this configuration, there is no requirement for an internet gateway, NAT device, or VPN connection. All the traffic remains securely within the AWS Cloud. Because of their logical isolation, domains that reside within an Amazon VPC have an extra layer of security when compared to domains that use public endpoints. To properly manage access, AWS Lambda functions should be assigned to a VPC.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	mfa-enabled-for-iam-console-access	Manage access to resources in the AWS Cloud by ensuring that MFA is enabled for all AWS Identity and Access Management (IAM) users that have a console password. MFA adds an extra layer of protection on top of sign-in credentials. By requiring MFA for users, you can reduce incidents of compromised accounts and keep sensitive data from being accessed by unauthorized users.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	rds-instance-public-access-check	Manage access to resources in the AWS Cloud by ensuring that Amazon Relational Database Service (Amazon RDS) instances are not public. Amazon RDS database instances can contain sensitive information, and principles and access control is required for such accounts.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	rds-snapshots-public-prohibited	Manage access to resources in the AWS Cloud by ensuring that Amazon Relational Database Service (Amazon RDS) instances are not public. Amazon RDS database instances can contain sensitive information and principles and access control is required for such accounts.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	redshift-cluster-public-access-check	Manage access to resources in the AWS Cloud by ensuring that Amazon Redshift clusters are not public. Amazon Redshift clusters can contain sensitive information and principles and access control is required for such accounts.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	restricted-common-ports	Manage access to resources in the AWS Cloud by ensuring common ports are restricted on Amazon Elastic Compute Cloud (Amazon EC2) security groups. Not restricting access to ports to trusted sources can lead to attacks against the availability, integrity and confidentiality of systems. This rule allows you to optionally set blockedPort1 - blockedPort5 parameters (Config Defaults: 20,21,3389,3306,4333). The actual values should reflect your organization's policies.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	root-account-hardware-mfa-enabled	Manage access to resources in the AWS Cloud by ensuring hardware MFA is enabled for the root user. The root user is the most privileged user in an AWS account. The MFA adds an extra layer of protection for sign-in credentials. By requiring MFA for the root user, you can reduce the incidents of compromised AWS accounts.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	root-account-mfa-enabled	Manage access to resources in the AWS Cloud by ensuring MFA is enabled for the root user. The root user is the most privileged user in an AWS account. The MFA adds an extra layer of protection for sign-in credentials. By requiring MFA for the root user, you can reduce the incidents of compromised AWS accounts.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	s3-account-level-public-access-blocks-periodic	Manage access to resources in the AWS Cloud by ensuring that Amazon Simple Storage Service (Amazon S3) buckets cannot be publicly accessed. This rule helps keeping sensitive data safe from unauthorized remote users by preventing public access. This rule allows you to optionally set the ignorePublicAcls (Config Default: True), blockPublicPolicy (Config Default: True), blockPublicAcls (Config Default: True), and restrictPublicBuckets parameters (Config Default: True). The actual values should reflect your organization's policies.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	s3-bucket-level-public-access-prohibited	Manage access to resources in the AWS Cloud by ensuring that Amazon Simple Storage Service (Amazon S3) buckets cannot be publicly accessed. This rule helps keeping sensitive data safe from unauthorized remote users by preventing public access at the bucket level.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	s3-bucket-policy-grantee-check	Manage access to the AWS Cloud by enabling s3_ bucket_policy_grantee_check. This rule checks that the access granted by the Amazon S3 bucket is restricted by any of the AWS principals, federated users, service principals, IP addresses, or Amazon Virtual Private Cloud (Amazon VPC) IDs that you provide.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	s3-bucket-public-read-prohibited	Manage access to resources in the AWS Cloud by only allowing authorized users, processes, and devices access to Amazon Simple Storage Service (Amazon S3) buckets. The management of access should be consistent with the classification of the data.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	s3-bucket-public-write-prohibited	Manage access to resources in the AWS Cloud by only allowing authorized users, processes, and devices access to Amazon Simple Storage Service (Amazon S3) buckets. The management of access should be consistent with the classification of the data.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	sagemaker-notebook-no-direct-internet-access	Manage access to resources in the AWS Cloud by ensuring that Amazon SageMaker notebooks do not allow direct internet access. By preventing direct internet access, you can keep sensitive data from being accessed by unauthorized users.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	vpc-default-security-group-closed	Amazon Elastic Compute Cloud (Amazon EC2) security groups can help in the management of network access by providing stateful filtering of ingress and egress network traffic to AWS resources. Restricting all the traffic on the default security group helps in restricting remote access to your AWS resources.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	vpc-sg-open-only-to-authorized-ports	Manage access to resources in the AWS Cloud by ensuring common ports are restricted on Amazon Elastic Compute Cloud (Amazon EC2) Security Groups. Not restricting access on ports to trusted sources can lead to attacks against the availability, integrity and confidentiality of systems. By restricting access to resources within a security group from the internet (0.0.0.0/0) remote access can be controlled to internal systems.
AC.L1-3.1.2	Limit information system access to the types of transactions and functions that authorized users are permitted to execute.	opensearch-in-vpc-only	Manage access to the AWS Cloud by ensuring Amazon OpenSearch Service domains are within an Amazon Virtual Private Cloud (Amazon VPC). An Amazon OpenSearch Service domain within an Amazon VPC enables secure communication between Amazon OpenSearch Service and other services within the Amazon VPC without the need for an internet gateway, NAT device, or VPN connection.
AC.L1-3.1.20	Verify and control/limit connections to and use of external information systems.	alb-waf-enabled	Ensure AWS WAF is enabled on Elastic Load Balancers (ELB) to help protect web applications. A WAF helps to protect your web applications or APIs against common web exploits. These web exploits may affect availability, compromise security, or consume excessive resources within your environment.
AC.L1-3.1.20	Verify and control/limit connections to and use of external information systems.	autoscaling-launch-config-public-ip-disabled	If you configure your Network Interfaces with a public IP address, then the associated resources to those Network Interfaces are reachable from the internet. EC2 resources should not be publicly accessible, as this may allow unintended access to your applications or servers.
AC.L1-3.1.20	Verify and control/limit connections to and use of external information systems.	ec2-instance-no-public-ip	Manage access to the AWS Cloud by ensuring Amazon Elastic Compute Cloud (Amazon EC2) instances cannot be publicly accessed. Amazon EC2 instances can contain sensitive information and access control is required for such accounts.
AC.L1-3.1.20	Verify and control/limit connections to and use of external information systems.	emr-master-no-public-ip	Manage access to the AWS Cloud by ensuring Amazon EMR cluster master nodes cannot be publicly accessed. Amazon EMR cluster master nodes can contain sensitive information and access control is required for such accounts.
AC.L1-3.1.20	Verify and control/limit connections to and use of external information systems.	restricted-ssh	Amazon Elastic Compute Cloud (Amazon EC2) Security Groups can help manage network access by providing stateful filtering of ingress and egress network traffic to AWS resources. Not allowing ingress (or remote) traffic from 0.0.0.0/0 to port 22 on your resources help you restricting remote access.
AC.L1-3.1.20	Verify and control/limit connections to and use of external information systems.	internet-gateway-authorized-vpc-only	Manage access to resources in the AWS Cloud by ensuring that internet gateways are only attached to authorized Amazon Virtual Private Cloud (Amazon VPC). Internet gateways allow bi-directional internet access to and from the Amazon VPC that can potentially lead to unauthorized access to Amazon VPC resources.
AC.L1-3.1.20	Verify and control/limit connections to and use of external information systems.	lambda-function-public-access-prohibited	Manage access to resources in the AWS Cloud by ensuring AWS Lambda functions cannot be publicly accessed. Public access can potentially lead to degradation of availability of resources.
AC.L1-3.1.20	Verify and control/limit connections to and use of external information systems.	no-unrestricted-route-to-igw	Ensure Amazon EC2 route tables do not have unrestricted routes to an internet gateway. Removing or limiting the access to the internet for workloads within Amazon VPCs can reduce unintended access within your environment.
AC.L1-3.1.20	Verify and control/limit connections to and use of external information systems.	rds-instance-public-access-check	Manage access to resources in the AWS Cloud by ensuring that Amazon Relational Database Service (Amazon RDS) instances are not public. Amazon RDS database instances can contain sensitive information, and principles and access control is required for such accounts.
AC.L1-3.1.20	Verify and control/limit connections to and use of external information systems.	redshift-cluster-public-access-check	Manage access to resources in the AWS Cloud by ensuring that Amazon Redshift clusters are not public. Amazon Redshift clusters can contain sensitive information and principles and access control is required for such accounts.
AC.L1-3.1.20	Verify and control/limit connections to and use of external information systems.	restricted-common-ports	Manage access to resources in the AWS Cloud by ensuring common ports are restricted on Amazon Elastic Compute Cloud (Amazon EC2) security groups. Not restricting access to ports to trusted sources can lead to attacks against the availability, integrity and confidentiality of systems. This rule allows you to optionally set blockedPort1 - blockedPort5 parameters (Config Defaults: 20,21,3389,3306,4333). The actual values should reflect your organization's policies.
AC.L1-3.1.20	Verify and control/limit connections to and use of external information systems.	s3-account-level-public-access-blocks-periodic	Manage access to resources in the AWS Cloud by ensuring that Amazon Simple Storage Service (Amazon S3) buckets cannot be publicly accessed. This rule helps keeping sensitive data safe from unauthorized remote users by preventing public access. This rule allows you to optionally set the ignorePublicAcls (Config Default: True), blockPublicPolicy (Config Default: True), blockPublicAcls (Config Default: True), and restrictPublicBuckets parameters (Config Default: True). The actual values should reflect your organization's policies.
AC.L1-3.1.20	Verify and control/limit connections to and use of external information systems.	s3-bucket-level-public-access-prohibited	Manage access to resources in the AWS Cloud by ensuring that Amazon Simple Storage Service (Amazon S3) buckets cannot be publicly accessed. This rule helps keeping sensitive data safe from unauthorized remote users by preventing public access at the bucket level.
AC.L1-3.1.20	Verify and control/limit connections to and use of external information systems.	s3-bucket-public-read-prohibited	Manage access to resources in the AWS Cloud by only allowing authorized users, processes, and devices access to Amazon Simple Storage Service (Amazon S3) buckets. The management of access should be consistent with the classification of the data.
AC.L1-3.1.20	Verify and control/limit connections to and use of external information systems.	s3-bucket-public-write-prohibited	Manage access to resources in the AWS Cloud by only allowing authorized users, processes, and devices access to Amazon Simple Storage Service (Amazon S3) buckets. The management of access should be consistent with the classification of the data.
AC.L1-3.1.20	Verify and control/limit connections to and use of external information systems.	sagemaker-notebook-no-direct-internet-access	Manage access to resources in the AWS Cloud by ensuring that Amazon SageMaker notebooks do not allow direct internet access. By preventing direct internet access, you can keep sensitive data from being accessed by unauthorized users.
AC.L1-3.1.20	Verify and control/limit connections to and use of external information systems.	ssm-document-not-public	Ensure AWS Systems Manager (SSM) documents are not public, as this may allow unintended access to your SSM documents. A public SSM document can expose information about your account, resources and internal processes.
AC.L1-3.1.20	Verify and control/limit connections to and use of external information systems.	subnet-auto-assign-public-ip-disabled	Manage access to the AWS Cloud by ensuring Amazon Virtual Private Cloud (VPC) subnets are not automatically assigned a public IP address. Amazon Elastic Compute Cloud (EC2) instances that are launched into subnets that have this attribute enabled have a public IP address assigned to their primary network interface.
AC.L1-3.1.20	Verify and control/limit connections to and use of external information systems.	vpc-default-security-group-closed	Amazon Elastic Compute Cloud (Amazon EC2) security groups can help in the management of network access by providing stateful filtering of ingress and egress network traffic to AWS resources. Restricting all the traffic on the default security group helps in restricting remote access to your AWS resources.
AC.L1-3.1.20	Verify and control/limit connections to and use of external information systems.	vpc-sg-open-only-to-authorized-ports	Manage access to resources in the AWS Cloud by ensuring common ports are restricted on Amazon Elastic Compute Cloud (Amazon EC2) Security Groups. Not restricting access on ports to trusted sources can lead to attacks against the availability, integrity and confidentiality of systems. By restricting access to resources within a security group from the internet (0.0.0.0/0) remote access can be controlled to internal systems.
IA.L1-3.5.1	Identify information system users, processes acting on behalf of users, or devices.	api-gw-execution-logging-enabled	API Gateway logging displays detailed views of users who accessed the API and the way they accessed the API. This insight enables visibility of user activities.
IA.L1-3.5.1	Identify information system users, processes acting on behalf of users, or devices.	cloudtrail-s3-dataevents-enabled	The collection of Simple Storage Service (Amazon S3) data events helps in detecting any anomalous activity. The details include AWS account information that accessed an Amazon S3 bucket, IP address, and time of event.
IA.L1-3.5.1	Identify information system users, processes acting on behalf of users, or devices.	cloud-trail-cloud-watch-logs-enabled	Use Amazon CloudWatch to centrally collect and manage log event activity. Inclusion of AWS CloudTrail data provides details of API call activity within your AWS account.
IA.L1-3.5.1	Identify information system users, processes acting on behalf of users, or devices.	elb-logging-enabled	Elastic Load Balancing activity is a central point of communication within an environment. Ensure ELB logging is enabled. The collected data provides detailed information about requests sent to the ELB. Each log contains information such as the time the request was received, the client's IP address, latencies, request paths, and server responses.
IA.L1-3.5.1	Identify information system users, processes acting on behalf of users, or devices.	emr-kerberos-enabled	The access permissions and authorizations can be managed and incorporated with the principles of least privilege and separation of duties, by enabling Kerberos for Amazon EMR clusters. In Kerberos, the services and the users that need to authenticate are known as principals. The principals exist within a Kerberos realm. Within the realm, a Kerberos server is known as the key distribution center (KDC). It provides a means for the principals to authenticate. The KDC authenticates by issuing tickets for authentication. The KDC maintains a database of the principals within its realm, their passwords, and other administrative information about each principal.
IA.L1-3.5.1	Identify information system users, processes acting on behalf of users, or devices.	multi-region-cloudtrail-enabled	AWS CloudTrail records AWS Management Console actions and API calls. You can identify which users and accounts called AWS, the source IP address from where the calls were made, and when the calls occurred. CloudTrail will deliver log files from all AWS Regions to your S3 bucket if MULTI_REGION_CLOUD_TRAIL_ENABLED is enabled. Additionally, when AWS launches a new Region, CloudTrail will create the same trail in the new Region. As a result, you will receive log files containing API activity for the new Region without taking any action.
IA.L1-3.5.1	Identify information system users, processes acting on behalf of users, or devices.	rds-logging-enabled	To help with logging and monitoring within your environment, ensure Amazon Relational Database Service (Amazon RDS) logging is enabled. With Amazon RDS logging, you can capture events such as connections, disconnections, queries, or tables queried.
IA.L1-3.5.1	Identify information system users, processes acting on behalf of users, or devices.	s3-bucket-logging-enabled	Amazon Simple Storage Service (Amazon S3) server access logging provides a method to monitor the network for potential cybersecurity events. The events are monitored by capturing detailed records for the requests that are made to an Amazon S3 bucket. Each access log record provides details about a single access request. The details include the requester, bucket name, request time, request action, response status, and an error code, if relevant.
IA.L1-3.5.1	Identify information system users, processes acting on behalf of users, or devices.	wafv2-logging-enabled	To help with logging and monitoring within your environment, enable AWS WAF (V2) logging on regional and global web ACLs. AWS WAF logging provides detailed information about the traffic that is analyzed by your web ACL. The logs record the time that AWS WAF received the request from your AWS resource, information about the request, and an action for the rule that each request matched.
IA.L1-3.5.2	Authenticate (or verify) the identities of those users, processes, or devices, as a prerequisite to allowing access to organizational information systems.	emr-kerberos-enabled	The access permissions and authorizations can be managed and incorporated with the principles of least privilege and separation of duties, by enabling Kerberos for Amazon EMR clusters. In Kerberos, the services and the users that need to authenticate are known as principals. The principals exist within a Kerberos realm. Within the realm, a Kerberos server is known as the key distribution center (KDC). It provides a means for the principals to authenticate. The KDC authenticates by issuing tickets for authentication. The KDC maintains a database of the principals within its realm, their passwords, and other administrative information about each principal.
IA.L1-3.5.2	Authenticate (or verify) the identities of those users, processes, or devices, as a prerequisite to allowing access to organizational information systems.	iam-password-policy	The identities and the credentials are issued, managed, and verified based on an organizational IAM password policy. They meet or exceed requirements as stated by NIST SP 800-63 and the AWS Foundational Security Best Practices standard for password strength. This rule allows you to optionally set RequireUppercaseCharacters (AWS Foundational Security Best Practices value: true), RequireLowercaseCharacters (AWS Foundational Security Best Practices value: true), RequireSymbols (AWS Foundational Security Best Practices value: true), RequireNumbers (AWS Foundational Security Best Practices value: true), MinimumPasswordLength (AWS Foundational Security Best Practices value: 14), PasswordReusePrevention (AWS Foundational Security Best Practices value: 24), and MaxPasswordAge (AWS Foundational Security Best Practices value: 90) for your IAM Password Policy. The actual values should reflect your organization's policies.
IA.L1-3.5.2	Authenticate (or verify) the identities of those users, processes, or devices, as a prerequisite to allowing access to organizational information systems.	iam-user-mfa-enabled	Enable this rule to restrict access to resources in the AWS Cloud. This rule ensures multi-factor authentication (MFA) is enabled for all users. MFA adds an extra layer of protection on top of sign-in credentials. Reduce the incidents of compromised accounts by requiring MFA for users.
IA.L1-3.5.2	Authenticate (or verify) the identities of those users, processes, or devices, as a prerequisite to allowing access to organizational information systems.	mfa-enabled-for-iam-console-access	Manage access to resources in the AWS Cloud by ensuring that MFA is enabled for all AWS Identity and Access Management (IAM) users that have a console password. MFA adds an extra layer of protection on top of sign-in credentials. By requiring MFA for users, you can reduce incidents of compromised accounts and keep sensitive data from being accessed by unauthorized users.
IA.L1-3.5.2	Authenticate (or verify) the identities of those users, processes, or devices, as a prerequisite to allowing access to organizational information systems.	root-account-hardware-mfa-enabled	Manage access to resources in the AWS Cloud by ensuring hardware MFA is enabled for the root user. The root user is the most privileged user in an AWS account. The MFA adds an extra layer of protection for sign-in credentials. By requiring MFA for the root user, you can reduce the incidents of compromised AWS accounts.
IA.L1-3.5.2	Authenticate (or verify) the identities of those users, processes, or devices, as a prerequisite to allowing access to organizational information systems.	root-account-mfa-enabled	Manage access to resources in the AWS Cloud by ensuring MFA is enabled for the root user. The root user is the most privileged user in an AWS account. The MFA adds an extra layer of protection for sign-in credentials. By requiring MFA for the root user, you can reduce the incidents of compromised AWS accounts.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	alb-http-drop-invalid-header-enabled	Ensure that your Elastic Load Balancers (ELB) are configured to drop http headers. Because sensitive data can exist, enable encryption in transit to help protect that data.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	alb-http-to-https-redirection-check	To help protect data in transit, ensure that your Application Load Balancer automatically redirects unencrypted HTTP requests to HTTPS. Because sensitive data can exist, enable encryption in transit to help protect that data.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	alb-waf-enabled	Ensure AWS WAF is enabled on Elastic Load Balancers (ELB) to help protect web applications. A WAF helps to protect your web applications or APIs against common web exploits. These web exploits may affect availability, compromise security, or consume excessive resources within your environment.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	api-gw-associated-with-waf	AWS WAF enables you to configure a set of rules (called a web access control list (web ACL)) that allow, block, or count web requests based on customizable web security rules and conditions that you define. Ensure your Amazon API Gateway stage is associated with a WAF Web ACL to protect it from malicious attacks
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	cloudwatch-alarm-action-check	Amazon CloudWatch alarms alert when a metric breaches the threshold for a specified number of evaluation periods. The alarm performs one or more actions based on the value of the metric or expression relative to a threshold over a number of time periods. This rule requires a value for alarmActionRequired (Config Default: True), insufficientDataActionRequired (Config Default: True), okActionRequired (Config Default: False). The actual value should reflect the alarm actions for your environment.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	dms-replication-not-public	Manage access to the AWS Cloud by ensuring DMS replication instances cannot be publicly accessed. DMS replication instances can contain sensitive information and access control is required for such accounts.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	ebs-snapshot-public-restorable-check	Manage access to the AWS Cloud by ensuring EBS snapshots are not publicly restorable. EBS volume snapshots can contain sensitive information and access control is required for such accounts.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	elasticsearch-in-vpc-only	Manage access to the AWS Cloud by ensuring Amazon OpenSearch Service (OpenSearch Service) Domains are within an Amazon Virtual Private Cloud (Amazon VPC). An OpenSearch Service domain within an Amazon VPC enables secure communication between OpenSearch Service and other services within the Amazon VPC without the need for an internet gateway, NAT device, or VPN connection.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	elasticsearch-node-to-node-encryption-check	Ensure node-to-node encryption for Amazon OpenSearch Service is enabled. Node-to-node encryption enables TLS 1.2 encryption for all communications within the Amazon Virtual Private Cloud (Amazon VPC). Because sensitive data can exist, enable encryption in transit to help protect that data.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	elb-acm-certificate-required	Because sensitive data can exist and to help protect data at transit, ensure encryption is enabled for your Elastic Load Balancing. Use AWS Certificate Manager to manage, provision and deploy public and private SSL/TLS certificates with AWS services and internal resources.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	elb-tls-https-listeners-only	Ensure that your Elastic Load Balancers (ELBs) are configured with SSL or HTTPS listeners. Because sensitive data can exist, enable encryption in transit to help protect that data.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	guardduty-enabled-centralized	Amazon GuardDuty can help to monitor and detect potential cybersecurity events by using threat intelligence feeds. These include lists of malicious IPs and machine learning to identify unexpected, unauthorized, and malicious activity within your AWS Cloud environment.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	restricted-ssh	Amazon Elastic Compute Cloud (Amazon EC2) Security Groups can help manage network access by providing stateful filtering of ingress and egress network traffic to AWS resources. Not allowing ingress (or remote) traffic from 0.0.0.0/0 to port 22 on your resources help you restricting remote access.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	ec2-instances-in-vpc	Deploy Amazon Elastic Compute Cloud (Amazon EC2) instances within an Amazon Virtual Private Cloud (Amazon VPC) to enable secure communication between an instance and other services within the amazon VPC, without requiring an internet gateway, NAT device, or VPN connection. All traffic remains securely within the AWS Cloud. Because of their logical isolation, domains that reside within an Amazon VPC have an extra layer of security when compared to domains that use public endpoints. Assign Amazon EC2 instances to an Amazon VPC to properly manage access.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	internet-gateway-authorized-vpc-only	Manage access to resources in the AWS Cloud by ensuring that internet gateways are only attached to authorized Amazon Virtual Private Cloud (Amazon VPC). Internet gateways allow bi-directional internet access to and from the Amazon VPC that can potentially lead to unauthorized access to Amazon VPC resources.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	lambda-function-public-access-prohibited	Manage access to resources in the AWS Cloud by ensuring AWS Lambda functions cannot be publicly accessed. Public access can potentially lead to degradation of availability of resources.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	lambda-inside-vpc	Deploy AWS Lambda functions within an Amazon Virtual Private Cloud (Amazon VPC) for a secure communication between a function and other services within the Amazon VPC. With this configuration, there is no requirement for an internet gateway, NAT device, or VPN connection. All the traffic remains securely within the AWS Cloud. Because of their logical isolation, domains that reside within an Amazon VPC have an extra layer of security when compared to domains that use public endpoints. To properly manage access, AWS Lambda functions should be assigned to a VPC.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	no-unrestricted-route-to-igw	Ensure Amazon EC2 route tables do not have unrestricted routes to an internet gateway. Removing or limiting the access to the internet for workloads within Amazon VPCs can reduce unintended access within your environment.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	rds-instance-public-access-check	Manage access to resources in the AWS Cloud by ensuring that Amazon Relational Database Service (Amazon RDS) instances are not public. Amazon RDS database instances can contain sensitive information, and principles and access control is required for such accounts.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	rds-snapshots-public-prohibited	Manage access to resources in the AWS Cloud by ensuring that Amazon Relational Database Service (Amazon RDS) instances are not public. Amazon RDS database instances can contain sensitive information and principles and access control is required for such accounts.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	redshift-cluster-public-access-check	Manage access to resources in the AWS Cloud by ensuring that Amazon Redshift clusters are not public. Amazon Redshift clusters can contain sensitive information and principles and access control is required for such accounts.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	redshift-require-tls-ssl	Ensure that your Amazon Redshift clusters require TLS/SSL encryption to connect to SQL clients. Because sensitive data can exist, enable encryption in transit to help protect that data.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	restricted-common-ports	Manage access to resources in the AWS Cloud by ensuring common ports are restricted on Amazon Elastic Compute Cloud (Amazon EC2) security groups. Not restricting access to ports to trusted sources can lead to attacks against the availability, integrity and confidentiality of systems. This rule allows you to optionally set blockedPort1 - blockedPort5 parameters (Config Defaults: 20,21,3389,3306,4333). The actual values should reflect your organization's policies.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	s3-account-level-public-access-blocks-periodic	Manage access to resources in the AWS Cloud by ensuring that Amazon Simple Storage Service (Amazon S3) buckets cannot be publicly accessed. This rule helps keeping sensitive data safe from unauthorized remote users by preventing public access. This rule allows you to optionally set the ignorePublicAcls (Config Default: True), blockPublicPolicy (Config Default: True), blockPublicAcls (Config Default: True), and restrictPublicBuckets parameters (Config Default: True). The actual values should reflect your organization's policies.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	s3-bucket-level-public-access-prohibited	Manage access to resources in the AWS Cloud by ensuring that Amazon Simple Storage Service (Amazon S3) buckets cannot be publicly accessed. This rule helps keeping sensitive data safe from unauthorized remote users by preventing public access at the bucket level.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	s3-bucket-public-read-prohibited	Manage access to resources in the AWS Cloud by only allowing authorized users, processes, and devices access to Amazon Simple Storage Service (Amazon S3) buckets. The management of access should be consistent with the classification of the data.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	s3-bucket-public-write-prohibited	Manage access to resources in the AWS Cloud by only allowing authorized users, processes, and devices access to Amazon Simple Storage Service (Amazon S3) buckets. The management of access should be consistent with the classification of the data.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	s3-bucket-ssl-requests-only	To help protect data in transit, ensure that your Amazon Simple Storage Service (Amazon S3) buckets require requests to use Secure Socket Layer (SSL). Because sensitive data can exist, enable encryption in transit to help protect that data.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	sagemaker-notebook-no-direct-internet-access	Manage access to resources in the AWS Cloud by ensuring that Amazon SageMaker notebooks do not allow direct internet access. By preventing direct internet access, you can keep sensitive data from being accessed by unauthorized users.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	securityhub-enabled	AWS Security Hub helps to monitor unauthorized personnel, connections, devices, and software. AWS Security Hub aggregates, organizes, and prioritizes the security alerts, or findings, from multiple AWS services. Some such services are Amazon Security Hub, Amazon Inspector, Amazon Macie, AWS Identity and Access Management (IAM) Access Analyzer, and AWS Firewall Manager, and AWS Partner solutions.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	ssm-document-not-public	Ensure AWS Systems Manager (SSM) documents are not public, as this may allow unintended access to your SSM documents. A public SSM document can expose information about your account, resources and internal processes.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	vpc-default-security-group-closed	Amazon Elastic Compute Cloud (Amazon EC2) security groups can help in the management of network access by providing stateful filtering of ingress and egress network traffic to AWS resources. Restricting all the traffic on the default security group helps in restricting remote access to your AWS resources.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	vpc-sg-open-only-to-authorized-ports	Manage access to resources in the AWS Cloud by ensuring common ports are restricted on Amazon Elastic Compute Cloud (Amazon EC2) Security Groups. Not restricting access on ports to trusted sources can lead to attacks against the availability, integrity and confidentiality of systems. By restricting access to resources within a security group from the internet (0.0.0.0/0) remote access can be controlled to internal systems.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	opensearch-in-vpc-only	Manage access to the AWS Cloud by ensuring Amazon OpenSearch Service domains are within an Amazon Virtual Private Cloud (Amazon VPC). An Amazon OpenSearch Service domain within an Amazon VPC enables secure communication between Amazon OpenSearch Service and other services within the Amazon VPC without the need for an internet gateway, NAT device, or VPN connection.
SC.L1-3.13.1	Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information systems) at the external boundaries and key internal boundaries of the information systems.	opensearch-node-to-node-encryption-check	Ensure node-to-node encryption for Amazon OpenSearch Service is enabled. Node-to-node encryption enables TLS 1.2 encryption for all communications within the Amazon Virtual Private Cloud (Amazon VPC). Because sensitive data can exist, enable encryption in transit to help protect that data.
SI.L1-3.14.1	Identify, report, and correct information and information system flaws in a timely manner.	cloudwatch-alarm-action-check	Amazon CloudWatch alarms alert when a metric breaches the threshold for a specified number of evaluation periods. The alarm performs one or more actions based on the value of the metric or expression relative to a threshold over a number of time periods. This rule requires a value for alarmActionRequired (Config Default: True), insufficientDataActionRequired (Config Default: True), okActionRequired (Config Default: False). The actual value should reflect the alarm actions for your environment.
SI.L1-3.14.1	Identify, report, and correct information and information system flaws in a timely manner.	guardduty-enabled-centralized	Amazon GuardDuty can help to monitor and detect potential cybersecurity events by using threat intelligence feeds. These include lists of malicious IPs and machine learning to identify unexpected, unauthorized, and malicious activity within your AWS Cloud environment.
SI.L1-3.14.1	Identify, report, and correct information and information system flaws in a timely manner.	securityhub-enabled	AWS Security Hub helps to monitor unauthorized personnel, connections, devices, and software. AWS Security Hub aggregates, organizes, and prioritizes the security alerts, or findings, from multiple AWS services. Some such services are Amazon Security Hub, Amazon Inspector, Amazon Macie, AWS Identity and Access Management (IAM) Access Analyzer, and AWS Firewall Manager, and AWS Partner solutions.
SI.L1-3.14.2	Provide protection from malicious code at appropriate locations within organizational information systems.	guardduty-enabled-centralized	Amazon GuardDuty can help to monitor and detect potential cybersecurity events by using threat intelligence feeds. These include lists of malicious IPs and machine learning to identify unexpected, unauthorized, and malicious activity within your AWS Cloud environment.
SI.L1-3.14.5	Perform periodic scans of the information system and real-time scans of files from external sources as files are downloaded, opened, or executed.	ecr-private-image-scanning-enabled	Amazon Elastic Container Repository (ECR) image scanning assists in identifying software vulnerabilities in your container images. Enabling image scanning on ECR repositories adds a layer of verification for the integrity and safety of the images being stored.

Template

The template is available on GitHub: Operational Best Practices for CMMC 2.0 Level 1.

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Document Conventions

Operational Best Practices for Criminal Justice Information Services (CJIS)

Operational Best Practices for CMMC 2.0 Level 2