Alibaba Cloud
AWS
Google Cloud
Microsoft AzureOverview
Overview
This control looks for KMSKeys that are accessible by IAM policies or roles which are attached to VMs that allow public access from the internet.
Remediation guidance
Remediation strategy
- Remove public management exposure from VMs.
- Limit KMS key access to approved identities only.
AWS
aws ec2 revoke-security-group-ingress --group-id <sg-id> --protocol tcp --port 22 --cidr 0.0.0.0/0
aws ec2 revoke-security-group-ingress --group-id <sg-id> --protocol tcp --port 3389 --cidr 0.0.0.0/0
GCP
gcloud compute firewall-rules update <rule-name> --source-ranges=<trusted-cidr>
gcloud kms keys remove-iam-policy-binding <key-name> --location <location> --keyring <keyring> --member="allUsers" --role="roles/cloudkms.cryptoKeyEncrypterDecrypter"
Azure
az network nsg rule update --resource-group <rg> --nsg-name <nsg> --name <rule> --source-address-prefixes <trusted-cidr>
az role assignment delete --assignee <principal-id> --role "Key Vault Crypto User" --scope <key-vault-or-key-scope>
References
- https://docs.aws.amazon.com/kms/latest/developerguide/key-policies.html
- https://cloud.google.com/kms/docs/reference/permissions-and-roles
- https://learn.microsoft.com/en-us/azure/key-vault/general/rbac-guide
Service-wide remediation
Recommended when many resources are affected: fix the platform baseline first so new resources inherit the secure setting, then remediate the existing flagged resources in batches.
AWS
Use AWS Organizations guardrails, AWS Config rules or conformance packs where they fit, approved account baselines, and IaC modules so new resources inherit the secure setting.
Google Cloud
Use organization or folder policies where available, shared project templates, logs and alerting baselines, and IaC modules so new resources inherit the secure setting.
Alibaba Cloud
Use Resource Directory guardrails, account baselines, and IaC modules so the secure setting is applied consistently across environments.
Azure
Use management group or subscription Azure Policy assignments, remediation tasks where supported, landing-zone standards, and IaC modules so drift is prevented at scale.
Operational rollout
- Fix the baseline first at the account, subscription, project, cluster, or tenant scope that owns this control.
- Remediate the currently affected resources in batches, starting with internet-exposed and production assets.
- Re-scan and track approved exceptions with an owner and expiry date.
Query logic
These are the stored checks tied to this control.
AWS KMSKeys Exposed Through Vulnerable VMs
Connectors
Covered asset types
Expected check: eq []
vms( where: { securityGroups_SOME: { rules_SOME: { direction: "Inbound" action: "Allow" AND: [ { OR: [ { sources_INCLUDES: "cidr:0.0.0.0/0" } { sources_INCLUDES: "cidr:::/0" } ] } { destFromPort_LTE: 22, destToPort_GTE: 22 } ] } } iamRoles_SOME: { iamPolicies_SOME: { iamPolicyStatements_SOME: { effect: "Allow" } } } } ) { iamRoles { iamPolicies { iamPolicyStatements { permissions { isOwnedByIAMAssetType { includesKMSKey {...AssetFragment} } } } } } }Google Cloud KMSKeys Exposed Through Vulnerable VMs
Connectors
Covered asset types
Expected check: eq []
vms( where: { firewalls_SOME: { rules_SOME: { direction: "Inbound" action: "Allow" AND: [ { OR: [ { sources_INCLUDES: "cidr:0.0.0.0/0" } { sources_INCLUDES: "cidr:::/0" } ] } { destFromPort_LTE: 22, destToPort_GTE: 22 } ] } } } ) { serviceAccount { serviceAccountRoles { hasIAMPermissions { isOwnedByIAMAssetType { includesKMSKey {...AssetFragment} } } } } }Alibaba KMSKeys Exposed Through Vulnerable VMs
Connectors
Covered asset types
Expected check: eq []
{
alibabaKMSKeysExposedThroughVMs {...AssetFragment}
}Azure KMSKeys Exposed Through Vulnerable VMs
Connectors
Covered asset types
Expected check: eq []
{ vms( where: { networkInterfaces_SOME: { securityGroups_SOME: { rules_SOME: { direction: "Inbound" action: "Allow" AND: [ { OR: [ { sources_INCLUDES: "cidr:0.0.0.0/0" } { sources_INCLUDES: "cidr:::/0" } { sources_INCLUDES: "tag:Internet" } { sources: [] } ] } { destFromPort_LTE: 22, destToPort_GTE: 22 } ] } } } } ) { vmRoles { hasIAMPermissions { isOwnedByIAMAssetType { includesKMSKey {...AssetFragment} } } } } }
