PlatformResourcesSign inSign Up

Ensure SNS topic policy is not public by only allowing specific services or principals to access it

Error: SNS topic policy is public and access is not restricted to specific services or principals

Bridgecrew Policy ID: BC_AWS_GENERAL_92
Checkov Check ID: CKV_AWS_169
Severity: MEDIUM

Suggest Edits

SNS topic policy is public and access is not restricted to specific services or principals

Description

It is generally a best practice to restrict access to Amazon SNS topics to only the specific services or principals that require access. This can help to reduce the risk of unauthorized access to the data stored in your topics and protect against potential data breaches.

Fix - Buildtime

Terraform

  • Resource: aws_sns_topic_policy
  • Argument: Statement
resource "aws_sns_topic_policy" "sns_tp1" {
    ...
  policy = <<POLICY
{
    "Version":"2012-10-17",
    "Statement":[
       {
          "Principal": "*",
    +     "Effect": "Deny",
          "Action": [
            "SNS:Subscribe",
            "SNS:SetTopicAttributes",
            "SNS:RemovePermission",
            "SNS:Receive",
            "SNS:Publish",
            "SNS:ListSubscriptionsByTopic",
            "SNS:GetTopicAttributes",
            "SNS:DeleteTopic",
            "SNS:AddPermission",
          ],
          "Resource": "${aws_sns_topic.test.arn}"
       }
    ]
}
POLICY
}

Updated 5 months ago