Grant access to Security Hub for SNS topic in different account

Question

We have a CloudWatch Alarm which triggers a SNS topic in a different account. Security Hub wants to check this topic, but fails with the below error visible in CloudTrail logs:

`User: arn:aws:sts::012345678912:assumed-role/AWSServiceRoleForSecurityHub/securityhub is not authorized to perform: SNS:ListSubscriptionsByTopic on resource: arn:aws:sns:eu-central-1:987654321012:my-topic because no resource-based policy allows the SNS:ListSubscriptionsByTopic action`

The topic contains the below access policy statement:

```
{
  "Sid": "AllowSecurityHubAccess",
  "Effect": "Allow",
  "Principal": {
    "Service": "securityhub.amazonaws.com"
  },
  "Action": [
    "sns:ListSubscriptionsByTopic"
  ],
  "Resource": "*"
}
```

Any ideas how to fix this?

Answer

Hi,Did you also considered providing the cross account access to the resource as it seems principle is in another account so you need to create the trust.

Grant access to Security Hub for SNS topic in different account

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