Rule: All S3 Buckets Should Log S3 Data Events in CloudTrail
This rule ensures that all S3 buckets log S3 data events in CloudTrail.
| Rule | All S3 buckets should log S3 data events in CloudTrail |
| Framework | CISA-cyber-essentials |
| Severity | ✔ Medium |
S3 Data Event Logging Rule for CISA Cyber Essentials
Description
This rule ensures that all S3 buckets within an AWS account are configured to enable CloudTrail logging for S3 data events. Logging S3 data events in CloudTrail provides detailed information about actions taken on objects within the S3 buckets. This is essential for auditing, security monitoring, and compliance purposes, aligning with the best practices outlined in the CISA Cyber Essentials framework.
Enabling CloudTrail logging for S3 data events allows tracking and reviewing of various activities performed on S3 objects, such as object-level operations, bucket-level operations, and bucket configurations. This includes actions like object uploads, downloads, modifications, deletions, as well as changes to bucket policies and access control configurations.
Troubleshooting
If CloudTrail logging for S3 data events is not enabled for a specific S3 bucket, the following steps can be taken to troubleshoot and rectify the issue:
- 1.
Verify CloudTrail and S3 Service Integration: Ensure that CloudTrail is successfully integrated with the S3 service in the AWS account.
- 2.
Check S3 Bucket Logging Configuration: Review the S3 bucket's logging configuration to validate if it has the necessary settings to enable CloudTrail logging for data events.
- 3.
Verify CloudTrail Trail Configuration: Confirm that there is an active CloudTrail trail capturing S3 data events and that it is properly configured.
- 4.
Check IAM Permissions: Ensure that the IAM user or role associated with the S3 bucket has the necessary permissions to perform CloudTrail logging operations.
- 5.
Review CloudTrail Logs: If CloudTrail logging is enabled for the S3 bucket but not functioning as expected, check the CloudTrail logs in Amazon S3 or CloudWatch Logs for any error messages.
Necessary Codes
There are no specific codes required to implement this rule. However, proper AWS Identity and Access Management (IAM) permissions and policies are essential for enabling CloudTrail logging for S3 data events.
Remediation Steps
To ensure that S3 buckets are configured correctly to log S3 data events in CloudTrail, follow these step-by-step remediation steps:
- 1.
Access AWS Management Console: Login to the AWS Management Console using appropriate credentials.
- 2.
Open S3 Service: Navigate to the Amazon S3 service by selecting it from the list of available AWS services.
- 3.
Select the Desired S3 Bucket: Choose the S3 bucket for which you want to enable CloudTrail logging of data events.
- 4.
Open Bucket Properties: Select the "Properties" tab for the chosen S3 bucket.
- 5.
Enable CloudTrail Logging: Under the "Management" section, click on "CloudTrail logging."
- 6.
Configure CloudTrail Logging: If there is an existing CloudTrail trail capturing S3 data events, select it from the dropdown menu. Otherwise, click on the "Create new trail" button to set up a new CloudTrail trail for S3 data events.
- 7.
Review Additional Configuration: Customizations like log file prefix, log file validation, and CloudWatch Logs integration can be configured as per organizational requirements.
- 8.
Save Configuration: Ensure to save the changes made to enable CloudTrail logging for S3 data events.
- 9.
Repeat for Other S3 Buckets: If multiple S3 buckets exist within the AWS account, repeat steps 3-8 for each bucket to ensure consistent logging across all buckets.
By following these steps, CloudTrail logging for S3 data events will be enabled for the selected S3 bucket(s) in compliance with the CISA Cyber Essentials framework.