Rule: IAM Groups Should Have at Least One User
This rule ensures that IAM groups are not empty, promoting proper access control.
| Rule | IAM groups should have at least one user |
| Framework | FedRAMP Low Revision 4 |
| Severity | ✔ High |
Rule Description:
According to the FedRAMP Low security standard, IAM (Identity and Access Management) groups should have at least one user assigned to them. This ensures that there is always a designated user responsible for managing the group and its associated permissions.
This rule helps maintain accountability and control over access to resources within an organization's infrastructure. By enforcing the presence of at least one user in each IAM group, it reduces the risk of unauthorized access and potential security breaches.
Troubleshooting Steps:
- 1.
Verify IAM Group Configuration:
- Check the IAM groups in your organization.
- Ensure that there is at least one user assigned to each group.
- Identify any groups that do not have a user assigned.
- 2.
Review Group Usage:
- Evaluate the purpose and usage of each IAM group.
- Determine if a user is genuinely required for each group.
- If a group is obsolete, consider removing it to maintain a clean IAM configuration.
- 3.
Assign a User to Groups:
- Identify a suitable user who will serve as the administrator or manager for each IAM group.
- Assign the user to the respective group.
- Ensure the user understands their responsibilities and has the necessary knowledge and permissions to fulfill them.
Necessary Code:
No specific code is required for this rule. It is a guideline to be followed within the IAM configuration.
Remediation Steps:
- 1.
List IAM Groups: To list all IAM groups in a specific AWS account, execute the following AWS CLI command:
aws iam list-groups - 2.
Identify Groups without Users: Review the output from the previous command and identify any groups that do not have any users assigned.
- 3.
Assign a User to Groups: Use the following AWS CLI command to add a user to an IAM group:
aws iam add-user-to-group --user-name <username> --group-name <groupname>Replace
with the name of the user you want to assign and<username>
with the name of the group you want to add the user to.<groupname> - 4.
Verify Assignment: After assigning a user to a group, use the following AWS CLI command to verify the assignment:
aws iam get-group --group-name <groupname>Replace
with the actual name of the group you assigned the user to. Check the output to confirm that the user is now associated with the group.<groupname> - 5.
Repeat for Each Group: Repeat steps 3 and 4 for each group that does not have a user assigned until all groups comply with the rule.
Remember to maintain proper documentation and communication within your organization to ensure all relevant stakeholders are aware of the assigned users and their responsibilities within each IAM group.
Note: The exact steps may vary depending on the cloud service provider you are using for IAM management.