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CloudWatch log metric filter and alarm are not set for changes to VPC network gateways Affecting CloudWatch service in AWS

Severity

0.0
medium
0
10
    Severity Framework
    Snyk CCSS
    Rule category
    Monitoring / Accounts Monitoring

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    Frameworks
    AWS-Well-Architected CIS-AWS HIPAA ISO-27001 NIST-800-53 PCI-DSS SOC-2
  • Snyk ID SNYK-CC-00182
  • credit Snyk Research Team
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Description

Monitoring changes to network gateways helps ensure that all ingress/egress traffic traverses the VPC border via a controlled path.

How to fix?

Create an aws_cloudwatch_log_metric_filter and aws_cloudwatch_metric_alarm with an appropriate pattern attribute set for an aws_cloudwatch_log_group and aws_cloudtrail set of resources.

Use the following pattern attribute set:

$.eventName=CreateCustomerGateway
$.eventName=DeleteCustomerGateway
$.eventName=AttachInternetGateway
$.eventName=CreateInternetGateway
$.eventName=DeleteInternetGateway
$.eventName=DetachInternetGateway