Google CloudOverview
Cloud Domain Name System (DNS) is a fast, reliable and cost-effective domain name system that powers millions of domains on the internet. Domain Name System Security Extensions (DNSSEC) in Cloud DNS enables domain owners to take easy steps to protect their domains against DNS hijacking and man-in-the-middle and other attacks.
Rationale
Domain Name System Security Extensions (DNSSEC) adds security to the DNS protocol by enabling DNS responses to be validated. Having a trustworthy DNS that translates a domain name like www.example.com into its associated IP address is an increasingly important building block of today's web-based applications. Attackers can hijack this process of domain/IP lookup and redirect users to a malicious site through DNS hijacking and man-in-the-middle attacks. DNSSEC helps mitigate the risk of such attacks by cryptographically signing DNS records. As a result, it prevents attackers from issuing fake DNS responses that may misdirect browsers to nefarious websites.
Remediation guidance
From Google Cloud Console
- Go to Cloud DNS by visiting https://console.cloud.google.com/netservices/dns/zones.
- For each zone of
Type Public, setDNSSECtoOn.
Using Google Cloud CLI
Use the below command to enable DNSSEC for Cloud DNS Zone Name.
gcloud dns managed-zones update <zoneName> --dnssec-state on
Default value
By default DNSSEC is not enabled.
References
- https://cloudplatform.googleblog.com/2017/11/DNSSEC-now-available-in-Cloud-DNS.html
- https://cloud.google.com/dns/dnssec-config#enabling
- https://cloud.google.com/dns/dnssec
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.
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.
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.
DNSSEC is enabled for Cloud DNS
Connectors
Covered asset types
Expected check: eq []
managedZones(where:{dnsSecConfigState_NOT:"on"}){...AssetFragment}
