Cloud Functions Should Connect To Resources In VPC only
More Info:
Cloud Functions should access resources only in VPCRisk Level
MediumAddress
SecurityCompliance Standards
PCIDSS, SOC2, NISTCSFTriage and Remediation
Remediation
Using Console
Using Console
To remediate the misconfiguration “Cloud Functions Should Connect To Resources In VPC only” for GCP using GCP console, follow the below steps:
- Open the Google Cloud Console and select the project where the Cloud Function is located.
- In the left-hand navigation menu, select “VPC Network” and then select “VPC networks”.
- Select the VPC network that you want to use for your Cloud Function.
- In the “VPC Network Details” page, select “Add subnet”.
- In the “Create subnet” page, enter a name for the subnet and select the region where you want the subnet to be located.
- Configure the subnet IP range and select the VPC network that you want to use for your Cloud Function.
- Click “Create” to create the subnet.
- In the left-hand navigation menu, select “Cloud Functions” and then select the Cloud Function that you want to configure.
- In the “Cloud Function Details” page, click on the “Edit” button.
- Scroll down to the “VPC connector” section and select the VPC connector that you created in step 6.
- Click “Save” to save the changes.
Using CLI
Using CLI
To remediate the misconfiguration of allowing Cloud Functions to connect to resources outside of VPC on GCP, you can follow the below steps using the GCP CLI:Replace [SUBNET_NAME], [NETWORK_NAME], [REGION], and [IP_RANGE] with appropriate values.Replace [FUNCTION_NAME], [CONNECTOR_NAME], [ENTRY_POINT], and [RUNTIME] with appropriate values.Replace [CONNECTOR_NAME], [NETWORK_NAME], [REGION], and [IP_RANGE] with appropriate values.By following the above steps, you can remediate the misconfiguration of allowing Cloud Functions to connect to resources outside of VPC on GCP and ensure that all Cloud Functions are only able to connect to resources within the VPC network.
- First, create a VPC network and subnet in your GCP project using the following command:
- Next, create a subnet within the VPC network using the following command:
- Now, you need to deploy the Cloud Function within the VPC network by specifying the
--vpc-connectorflag with thegcloud functions deploycommand. The--vpc-connectorflag specifies the name of the Serverless VPC Access connector to use for the function.
- Finally, create a Serverless VPC Access connector using the following command:
Using Python
Using Python
To remediate this misconfiguration in GCP, you can follow the below steps using Python:Step 1: Create a VPC connectorStep 2: Update the Cloud Function to use the VPC connectorStep 3: Test the updated Cloud Function
- First, create a VPC connector in the same region as your Cloud Function.
- You can create a VPC connector using the
google.cloud.functions.v1.VpcConnectorclient library in Python.
- Next, update the Cloud Function to use the VPC connector you created in step 1.
- You can update the Cloud Function using the
google.cloud.functions.v1.CloudFunctionsServiceClientclient library in Python.
- Finally, test the updated Cloud Function to ensure that it can only connect to resources in the VPC.
- You can test the Cloud Function by invoking it and verifying that it can only access resources in the VPC.
<your-project-id>, <your-region>, <your-connector-name>, <your-connector-uri>, and <your-function-name> with the appropriate values for your GCP environment.