Alarm is not set for denied connections in CloudFront logs Affecting CloudFront service in AWS
Severity Framework
CCSS (Common Configuration Scoring System) is a set of measures used to determine the severity of the rule.
Snyk CCSS
Rule category
Each rule is associated with a high-level category. For example IAM, Container, Monitoring, Logging, Network, etc.
Monitoring/ Network
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- Snyk IDSNYK-CC-00188
- creditSnyk Research Team
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*