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Alarm is not set for denied connections in CloudFront logs Affecting CloudFront service in AWS

Severity

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

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  • Snyk ID SNYK-CC-00188
  • credit Snyk Research Team
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Description

Alarms should be configured to alert users to denied connections to CloudFront distributions so users can investigate anomalous traffic.

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:

$.eventSource=cloudfront.amazonaws.com
$.errorCode=*UnauthorizedOperation
$.errorCode=AccessDenied*