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IAM Role inline policy has over permissive S3 access

Security & Compliance

An IAM Role having an inline policy that has over permissive S3 access is a role in AWS Identity and Access Management (IAM) that has been granted excessive privileges through an inline policy. The inline policy allows the role to perform all actions and have full access to the specified S3 buckets associated with the account, including create, read, update, and delete operations. This level of access is highly permissive and can pose a significant security risk if not properly managed. It is important to restrict access to only those resources and actions required for the role's job function and to ensure that appropriate monitoring and auditing measures are in place to detect any unauthorized activity. Organizations should also consider implementing additional security controls, such as encryption, access logging, and data retention policies, to further enhance the security of their S3 resources.


If you have identified an IAM Role with an inline policy that has over permissive S3 access, you should take the following remediation steps:

  1. Review and assess the potential impact: Before making any changes, you should review and assess the potential impact of changing the permissions. Determine if any applications or services depend on the current permissions and whether any data will be affected by the change.
  2. Remove the over-permissive inline policy: Remove the over-permissive inline policy from the IAM Role. This will immediately revoke the excessive privileges from the role.
  3. Create a new policy for necessary access: Create a new policy that grants the role only the specific access required for their job function. This policy should be scoped to only the necessary S3 buckets and actions required for the role's job function.
  4. Assign the new policy to the role: Assign the new policy to the IAM Role.
  5. Test the new policy: Once you have assigned the new policy, test it to verify that it grants the appropriate level of access to the necessary resources while also restricting access to non-administrative users.
  6. Monitor for unauthorized access: Monitor the S3 access logs for any unauthorized access attempts or unusual activity. This will help you to identify any further security issues and to take appropriate action.
  7. Consider implementing additional security controls: Consider implementing additional security controls, such as encryption, access logging, and data retention policies, to further enhance the security of your S3 resources.
  8. Regularly review access permissions: Regularly review the access permissions for IAM resources and S3 buckets to ensure that they remain appropriate and up-to-date. This will help to prevent future over-permissive access policies and potential security risks.
Enforced Resources
Note: Remediation steps provided by Lightlytics are meant to be suggestions and guidelines only. It is crucial to thoroughly verify and test any remediation steps before applying them to production environments. Each organization's infrastructure and security needs may differ, and blindly applying suggested remediation steps without proper testing could potentially cause unforeseen issues or vulnerabilities. Therefore, it is strongly recommended that you validate and customize any remediation steps to meet your organization's specific requirements and ensure that they align with your security policies and best practices.
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