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CloudWatch log metric filter and alarm are not set for S3 bucket policy changes 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 CIS-Controls HIPAA ISO-27001 PCI-DSS
  • Snyk ID SNYK-CC-00154
  • credit Snyk Research Team
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Description

Monitoring changes to S3 bucket policies may reduce time to detect and correct permissive policies on sensitive S3 buckets.

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=s3.amazonaws.com
$.eventName=PutBucketAcl
$.eventName=PutBucketPolicy
$.eventName=PutBucketCors
$.eventName=PutBucketLifecycle
$.eventName=PutBucketReplication
$.eventName=DeleteBucketPolicy
$.eventName=DeleteBucketCors
$.eventName=DeleteBucketLifecycle
$.eventName=DeleteBucketReplication