Remediation

From Google Cloud Console

1. Go to the VM instances page by visiting: https://console.cloud.google.com/compute/instances. It will list all the instances in your project.
2. Click on the name of the Impacted instance
3. Click Edit in the toolbar
4. Under SSH Keys, go to the Block project-wide SSH keys checkbox
5. To block users with project-wide SSH keys from connecting to this instance, select Block project-wide SSH keys
6. Click Save at the bottom of the page
7. Repeat steps for every impacted Instance

From Google Cloud CLI

To block project-wide public SSH keys, set the metadata value to TRUE:

        gcloud compute instances add-metadata <INSTANCE_NAME> --metadata block-project-ssh-keys=TRUE