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Ensure queues are not publicly accessible

### Overview

Category

Controls

High

Applies to

AWSGoogle Cloud

Coverage

null controls, 3 queries

Asset types

3 covered

Overview

Overview

Cyscale looks for managed queues that allow unrestricted access from the internet. Using publicly accessible queues allows anyone to send, intercept and delete messages leading to a potential data leakage to unwanted third parties.

Remediation guidance

Depending on the provider and service that you use, check out the following resources:

AWS

Google Cloud

Multiple Remediation Paths

AWS

SERVICE-WIDE (RECOMMENDED when many resources are affected): Deploy centralized guardrails and remediation using AWS Config Conformance Packs and (if applicable) AWS Organizations SCPs.

aws configservice put-organization-conformance-pack --organization-conformance-pack-name <pack-name> --template-s3-uri s3://<bucket>/<template>.yaml

ASSET-LEVEL: Apply the resource-specific remediation steps above to only the affected assets.

PREVENTIVE: Add CI/CD policy checks (CloudFormation/Terraform validation) before deployment to prevent recurrence.

Google Cloud

SERVICE-WIDE (RECOMMENDED when many resources are affected): Enforce Organization Policies at org/folder level so new resources inherit secure defaults.

gcloud org-policies set-policy policy.yaml

ASSET-LEVEL: Use the product-specific remediation steps above for only the impacted project/resources.

PREVENTIVE: Use org policy constraints/custom constraints and enforce checks in deployment pipelines.

References for Service-Wide Patterns

  • AWS Config Conformance Packs: https://docs.aws.amazon.com/config/latest/developerguide/conformance-packs.html
  • AWS Organizations SCP examples: https://docs.aws.amazon.com/organizations/latest/userguide/orgs_manage_policies_scps_examples.html
  • GCP Organization Policy overview: https://cloud.google.com/resource-manager/docs/organization-policy/overview
  • GCP Organization policy constraints catalog: https://cloud.google.com/resource-manager/docs/organization-policy/org-policy-constraints
  • gcloud org-policies: https://cloud.google.com/sdk/gcloud/reference/org-policies

Operational Rollout Workflow

Use this sequence to reduce risk and avoid repeated drift.

1. Contain at Service-Wide Scope First (Recommended)

  • AWS: deploy/adjust organization conformance packs and policy guardrails.
aws configservice put-organization-conformance-pack --organization-conformance-pack-name <pack-name> --template-s3-uri s3://<bucket>/<template>.yaml
  • Google Cloud: apply organization policy constraints at org/folder scope.
gcloud org-policies set-policy policy.yaml

2. Remediate Existing Affected Assets

  • Execute the control-specific Console/CLI steps documented above for each flagged resource.
  • Prioritize internet-exposed and production assets first.

3. Validate and Prevent Recurrence

  • Re-scan after each remediation batch.
  • Track exceptions with owner and expiry date.
  • Add preventive checks in IaC/CI pipelines.

Query logic

These are the stored checks tied to this control.

Publicly accessible SQS queues

Connectors

AWS

Covered asset types

SQSQueue

Expected check: eq []

{ sqsQueues(where: { policyDocument: { statements_SOME: { AND: [ { effect: "Allow" }, { OR: [ { principals_INCLUDES: "" }, { principals_INCLUDES: "*" }, { principals_INCLUDES: "AWS|*" }, ] } ] } } }) {...AssetFragment} }
Publicly Accessible PubSub Subscriptions

Connectors

Google Cloud

Covered asset types

PubSubSubscription

Expected check: eq []

{ pubSubSubscriptions( where: { iamBindings_SOME: { OR: [ { members_INCLUDES: "allAuthenticatedUsers" } { members_INCLUDES: "allUsers" } ] } } ) {...AssetFragment} } 
Publicly Accessible PubSub Topics

Connectors

Google Cloud

Covered asset types

PubSubTopic

Expected check: eq []

{ pubSubTopics( where: { iamBindings_SOME: { OR: [ { members_INCLUDES: "allAuthenticatedUsers" } { members_INCLUDES: "allUsers" } ] } } ) {...AssetFragment} } 
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