Ensure IAM Policy Should Not Grant Full Access to Service Rule
This rule ensures that IAM policies do not grant full access to a service, reducing security risks.
| Rule | Ensure IAM policy should not grant full access to service |
| Framework | NIST 800-53 Revision 5 |
| Severity | ✔ Critical |
IAM Policy Rule for NIST 800-53 Revision 5 Compliance
Description
In order to maintain compliance with the NIST 800-53 Revision 5 security framework, it is important to ensure that IAM (Identity and Access Management) policies do not grant full access to any service within your organization's infrastructure. This rule ensures that users or entities are given only the necessary permissions to fulfill their specific tasks and responsibilities, reducing the risk of unauthorized access or misuse.
Troubleshooting Steps
If a user is found with an IAM policy granting full access to a service, follow these troubleshooting steps to rectify the issue:
- 1.Identify the user: Identify the user or entity who has been granted full access to a service.
- 2.Review the policy: Examine the IAM policy of the user to understand the extent of access and identify the specific service with full access.
- 3.Analyze the requirements: Investigate the user's role or responsibility to determine if full access to the service is necessary or if it can be restricted based on their actual job requirements.
- 4.Update the policy: Modify the IAM policy of the user to remove full access to the service and grant only the relevant permissions required for their responsibilities.
- 5.Validate the changes: Verify that the user can still perform their tasks effectively with the revised IAM policy.
Necessary Codes
If any code snippet is required to implement or update the IAM policy, follow the code examples provided by AWS (Amazon Web Services) for the resource access control policy language (IAM JSON policy). Modify the code as per your specific requirements.
Step-by-Step Guide for Remediation
- 1.
Access AWS Management Console: Log in to the AWS Management Console using your account credentials.
- 2.
Open IAM Service: Navigate to the IAM service from the AWS Management Console.
- 3.
Identify the User: Identify the user or entity for whom you want to modify the IAM policy.
- 4.
View IAM Policies: Click on the "Users" section on the left-hand side menu and select the desired user from the list.
- 5.
Edit IAM Policy: Under the "Permissions" tab, locate the IAM policy that needs to be modified and click on the "Edit policy" button.
- 6.
Update the Policy: Modify the policy to remove the full access permissions for the specific service. Ensure that the policy grants only the necessary permissions based on the user's role and responsibilities.
- 7.
Save Changes: After making the necessary modifications, click on the "Review policy" button to review the changes.
- 8.
Revise and Save: If required, revise the policy further until it aligns with the NIST 800-53 Revision 5 compliance guidelines. Once satisfied, click on the "Save changes" button.
- 9.
Validate the Changes: Test the revised IAM policy by logging in as the specific user and ensuring they can perform their tasks effectively without unnecessary access.
- 10.
Monitor and Review: Regularly review IAM policies to ensure ongoing compliance with NIST 800-53 Revision 5 requirements and make adjustments as necessary.
By following these steps, you can ensure IAM policies do not grant full access to services, helping you maintain compliance with the NIST 800-53 Revision 5 security framework.