Resolving "403 Forbidden" Error in Chef Recipe Due to IAM Permissions

Information

Error Message: "403 Forbidden" during HTTP request in Chef recipe

Cause: The error is due to insufficient IAM permissions for accessing an S3 bucket. The IAM user or role does not have the necessary s3:GetObject permission, and there is an explicit deny in a service control policy.

Resolution Steps:

1. Review IAM Permissions:
   • Check the IAM user or role being used to access the S3 object.
   • Ensure there are no explicit Deny statements in any attached policies or SCPs that block s3:GetObject access.
2. Update IAM Policies:
   • Attach or update an IAM policy to allow s3:GetObject for the relevant bucket and object.
   • Example policy statement:

     {
       "Effect": "Allow",
       "Action": "s3:GetObject",
       "Resource": "arn:aws:s3:::<your_bucket>/*"
     }

   • Ensure there are no conflicting Deny statements elsewhere.
3. Test Access:
   • After updating the permissions, try accessing the S3 object directly using the AWS CLI or AWS Console to confirm access.
4. Re-run the Apply Process:
   • Once permissions are confirmed, trigger the Apply process again in your environment to verify that the Chef recipe can now access the S3 object successfully.

Note: Always test changes in a non-production environment first to avoid unintended impacts.