To remediate the CName Records vulnerability in GCP DNS using GCP CLI, follow these step-by-step instructions:

1. Install and set up the GCP CLI:

   • Download and install the Cloud SDK from the official Google Cloud website.
   • Open a terminal or command prompt and authenticate with your GCP account using the gcloud auth login command.
   • Set your project ID as the default project using the gcloud config set project [PROJECT_ID] command.

2. Identify the vulnerable CName Records:

   • Use the following command to list all the DNS managed zones in your project:

     gcloud dns managed-zones list
     

   • Identify the managed zone that contains the vulnerable CName Records.

3. Remove the vulnerable CName Records:

   • Replace [MANAGED_ZONE_NAME] with the name of the vulnerable managed zone in the following command:

     gcloud dns record-sets transaction start --zone=[MANAGED_ZONE_NAME]
     

   • Remove the vulnerable CName Records using the following command:

     gcloud dns record-sets transaction remove --zone=[MANAGED_ZONE_NAME] --name=[CNAME_RECORD_NAME] --type=CNAME --ttl=[TTL]
     

     Replace [CNAME_RECORD_NAME] with the name of the vulnerable CName record and [TTL] with the desired Time To Live value.
   • Execute the following command to apply the changes and commit the transaction:

     gcloud dns record-sets transaction execute --zone=[MANAGED_ZONE_NAME]
     

4. Verify the changes:

   • Use the following command to verify that the vulnerable CName Records have been removed:

     gcloud dns record-sets list --zone=[MANAGED_ZONE_NAME]
     

   • Ensure that the vulnerable CName Records are no longer listed.

By following these steps, you can remediate the CName Records vulnerability in GCP DNS using GCP CLI.

To remediate the CName Records vulnerability in GCP DNS using Python, follow these step-by-step instructions:

1. Install the required dependencies:

   • Install the google-cloud-dns library by running the following command:

     pip install google-cloud-dns
     

   • Make sure you have the Google Cloud SDK installed and authenticated with your GCP account.

2. Import the necessary modules in your Python script:

   from google.cloud import dns
   

3. Authenticate with your GCP account by setting the environment variable GOOGLE_APPLICATION_CREDENTIALS to the path of your service account key file:

   import os
   os.environ["GOOGLE_APPLICATION_CREDENTIALS"] = "/path/to/service-account-key.json"
   

4. Create a DNS client:

   client = dns.Client()
   

5. Retrieve the existing CName records:

   zone_name = "your-zone-name"
   zone = client.zone(zone_name)
   existing_records = zone.list_resource_record_sets()
   

6. Filter and delete the vulnerable CName records:

   vulnerable_records = [record for record in existing_records if record.record_type == "CNAME"]
   for record in vulnerable_records:
       zone.delete_record_set(record)
   

7. Apply the changes to the DNS zone:

   changes = zone.changes()
   for record in vulnerable_records:
       changes.delete_record_set(record)
   changes.create()
   

8. Confirm the changes:

   changes = zone.changes()
   changes.wait_for_change_to_apply()
   

By following these steps, you will be able to remediate the CName Records vulnerability in GCP DNS using Python. Make sure to replace your-zone-name with the actual name of your DNS zone and provide the path to your service account key file.