Remediation

From Console

1. Go to APIs & Services\Credentials using https://console.cloud.google.com/apis/credentials
2. In the section API Keys, Click the API Key Name. The API Key properties display on a new page.
3. In the Key restrictions section go to API restrictions.
4. Click the Select API drop-down to choose an API.
5. Click Save.
6. Repeat steps 2,3,4,5 for every unrestricted API key

Note: Do not set API restrictions to Google Cloud APIs, as this option allows access to all services offered by Google cloud.

From Google Cloud CLI

1. List all API keys.

   gcloud services api-keys list

2. Note the UID of the key to add restrictions to.

3. Run the update command with the appropriate flags to add the required restrictions.

   gcloud alpha services api-keys update <UID> <restriction_flags>

Note: Flags can be found by running

gcloud alpha services api-keys update --help

or in this documentation https://cloud.google.com/sdk/gcloud/reference/alpha/services/api-keys/update