Rule: Ensure all data in Amazon S3 is Secured

The rule/policy "cis_v150" ensures that all data stored in Amazon S3 (Simple Storage Service) is properly discovered, classified, and secured in accordance with the security standards outlined by CIS (Center for Internet Security).

Amazon S3 is a cloud storage service provided by Amazon Web Services (AWS). It allows individuals and businesses to store and retrieve data in a secure and highly scalable manner. The "cis_v150" policy focuses on the security aspects of data stored in Amazon S3 and aims to ensure that proper measures are in place to discover, classify, and secure the data as required by the CIS benchmark.

To comply with the "cis_v150" policy, the following steps are necessary:

It is essential to identify and discover all data stored in Amazon S3 buckets. This includes understanding the type of data, its sensitivity, ownership, and purpose. Data discovery can be achieved by reviewing the documentation provided by the data owners and conducting interviews if necessary.

Troubleshooting Steps:

• If there are difficulties in identifying all data stored in Amazon S3, you can consider utilizing AWS services like Amazon Macie or third-party solutions that offer automated data discovery.

Once the data has been discovered, it needs to be classified based on its sensitivity. The classification should take into account factors such as confidentiality, integrity, and availability. By categorizing data into different levels of sensitivity, it becomes easier to apply appropriate security controls.

Troubleshooting Steps:

• If there is uncertainty in classifying the data, work closely with the data owners or the relevant stakeholders who can provide insight into the data's sensitivity. Additionally, you can leverage tools or services that can help automate data classification based on predefined rules or machine learning algorithms.

Based on the classification, it is crucial to ensure the data is secured using appropriate security measures. This includes implementing access controls, encryption, and regular monitoring of access logs.

Remediation Steps:

• Implement access controls: Utilize AWS IAM (Identity and Access Management) to enforce fine-grained access controls for S3 buckets and objects. Restrict access to only authorized users and roles.
• Enable encryption: Enable server-side encryption at-rest for S3 buckets to protect the data stored within. You can choose to use SSE-S3, SSE-KMS, or SSE-C.
• Secure data in transit: Ensure data transferred to and from S3 buckets is encrypted using SSL/TLS.
• Monitor access logs: Enable S3 server access logging to capture all access and analyze the logs regularly to identify any unauthorized activities or suspicious patterns.

Troubleshooting Steps:

• In case of issues with access controls, verify the IAM policies associated with the S3 bucket and make any necessary updates or corrections.
• If encryption is not properly enabled, follow the AWS documentation to enable it for the specific S3 bucket or consult AWS support for further assistance.
• When monitoring access logs, ensure the appropriate AWS CloudTrail configurations are in place, and troubleshoot any issues with log collection or analysis tools.

By adhering to the "cis_v150" policy, organizations can ensure that all data stored in Amazon S3 is properly discovered, classified, and secured in order to meet the security standards outlined by CIS. This helps protect sensitive information and maintain the integrity of data stored in the cloud.