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SNS Topic has restrictions set for subscription

sns
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Description

Update your Amazon Simple Notification Service (SNS) topic subscription permissions.

Rationale

Anonymous users can subscribe and receive messages that you publish, leaving the security of your application or service at risk.

Remediation

From the console

Follow the Preventative best practices docs to learn how to implement least-privilege access or use IAM roles for your applications and AWS services.

From the command line

  1. Update your access control policy with the IAM user ARN. Configure action to SNS:Publish and include your AWS IAM ARN. Save the file.

    access-control-policy-sub.sh

        {
          ...
          "Statement": [
            ...
            {
              "Sid": "console_sub",
              "Effect": "Allow",
              "Principal": {
                "AWS": "arn:aws:iam::123456789012:root"
              },
              "Action": [
                "SNS:Subscribe",
                "SNS:Receive"
              ],
              ...
            }
          ]
        }
        
  2. Run set-topic-attributes with the ARN of the SNS topic.

    set-topic-attributes.sh

        aws sns set-topic-attributes
        --topic-arn arn:aws:sns:region:123456789012:YourTopic
        --attribute-name DisplayName
        --attribute-value YourTopicDisplayName