📝 AWS CloudTrail S3 Bucket Policy Changes Monitoring is not enabled 🟢
- Contextual name: 📝 S3 Bucket Policy Changes Monitoring is not enabled 🟢
- ID:
/ce/ca/aws/cloudtrail/s3-bucket-policy-changes-monitoring - Located in: 📁 AWS CloudTrail
Flags
Our Metadata
- Policy Type:
COMPLIANCE_POLICY - Policy Category:
SECURITY
Similar Policies
- Cloud Conformity
- Internal
dec-x-c4cc9ff5
Similar Internal Rules
| Rule | Policies | Flags |
|---|---|---|
| ✉️ dec-x-c4cc9ff5 | 1 |
Description
Description
Real-time monitoring of API calls can be achieved by directing CloudTrail Logs to CloudWatch Logs, or an external Security information and event management (SIEM) environment, and establishing corresponding metric filters and alarms.
It is recommended that a metric filter and alarm be established for changes to S3 bucket policies.
Rationale
CloudWatch is an AWS native service that allows you to observe and monitor resources and applications. CloudTrail Logs can also be sent to an external Security information and event management (SIEM) environment for monitoring and alerting.
Monitoring changes to S3 bucket policies may reduce time to detect and correct permissive policies on sensitive S3 buckets.
Audit
If you are using CloudTrails and CloudWatch, perform the following to ensure that there is at least one active multi-region CloudTrail with prescribed metric filters and alarms configured:
Identify the log group name configured for use with active multi-region CloudTrail:
- List all CloudTrails:
... [see more](description.md)
Remediation
Remediation
If you are using CloudTrails and CloudWatch, perform the following to setup the metric filter, alarm, SNS topic, and subscription:
- Create a metric filter based on filter pattern provided which checks for S3 bucket policy changes and the
<cloudtrail_log_group_name>taken from audit step 1:aws logs put-metric-filter --log-group-name <cloudtrail_log_group_name> --filter-name <s3_bucket_policy_changes_metric> --metric-transformations metricName= <s3_bucket_policy_changes_metric>, metricNamespace='CISBenchmark', metricValue=1 --filter-pattern '{ ($.eventSource = s3.amazonaws.com) && (($.eventName = PutBucketAcl) || ($.eventName = PutBucketPolicy) || ($.eventName = PutBucketCors) || ($.eventName = PutBucketLifecycle) || ($.eventName = PutBucketReplication) || ($.eventName = DeleteBucketPolicy) || ($.eventName = DeleteBucketCors) || ($.eventName = DeleteBucketLifecycle) || ($.eventName = DeleteBucketReplication)) }'Note: You can choose your own metricName and metricNamespace strings. Using the same metricNamespace for all Foundations Benchmark metrics will group them together.
... see more