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

Severity

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

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    Frameworks
    AWS-Well-Architected CIS-AWS HIPAA ISO-27001 NIST-800-53 PCI-DSS SOC-2
  • Snyk ID SNYK-CC-00098
  • credit Snyk Research Team
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Description

Monitoring changes to NACLs helps ensure that AWS resources and services are not unintentionally exposed.

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=CreateNetworkAcl
$.eventName=CreateNetworkAclEntry
$.eventName=DeleteNetworkAcl
$.eventName=DeleteNetworkAclEntry
$.eventName=ReplaceNetworkAclEntry
$.eventName=ReplaceNetworkAclAssociation