Fetch-url-http-3a-2f-2fmetadata.google.internal-2fcomputemetadata-2fv1-2finstance-2fservice - Accounts-2f [2021]

Fetch-url-http-3a-2f-2fmetadata.google.internal-2fcomputemetadata-2fv1-2finstance-2fservice - Accounts-2f [2021]

As a developer or engineer working with Google Cloud Platform (GCP), you may have stumbled upon a peculiar URL while troubleshooting or exploring the inner workings of your application: http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/ . This enigmatic fetch URL seems to hold secrets about your GCP instance and its service accounts. In this article, we'll embark on a journey to demystify this URL, understand its significance, and explore its uses.

This response indicates that the instance has a single service account associated with it, along with its email address, aliases, and the scopes it's authorized for.

.../token : Fetches an OAuth2 access token for the default service account. .../identity : Fetches an OpenID Connect (OIDC) ID token. As a developer or engineer working with Google

Demasiadas solicitudes: Esto ocurre porque algunos extremos usan límite de frecuencia para evitar la sobrecarga en el servicio de ... Google Cloud Documentation

If you have ever deployed an application on Google Compute Engine (GCE), Google Kubernetes Engine (GKE), or Cloud Run, you have likely encountered the magical, link-local address 169.254.169.254 or the DNS name metadata.google.internal . Among the most critical—and frequently misunderstood—endpoints on that server is the service accounts path: /computeMetadata/v1/instance/service-accounts/ . This response indicates that the instance has a

Server-Side Request Forgery occurs when an attacker can trick a vulnerable web application into making an HTTP request to an internal resource that the attacker cannot reach directly.

Many tools (like gcloud , gsutil , Terraform, Kubernetes on GKE) transparently rely on this mechanism. Google Kubernetes Engine (GKE)

– Do not expose the metadata endpoint to the public internet or other VMs. It is for instance-local use only.

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Next time you see a garbled http-3A-2F-2F in a log or configuration, you will know exactly how to fix it—and exactly what power you are unlocking from the Google metadata server.