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| name | cis-aws-storage-5.1 |
| description | Amazon Simple Storage Service (S3) |
| category | cis-storage-services |
| version | 1.0.0 |
| author | cyberstrike-official |
| tags | ["cis","aws","storage","s3","object-storage","level-2"] |
| cis_id | 5.1 |
| cis_benchmark | CIS AWS Storage Services Benchmark v1.0.0 |
| tech_stack | ["aws"] |
| cwe_ids | [] |
| chains_with | ["cis-aws-storage-5.2","cis-aws-storage-5.3"] |
| prerequisites | [] |
| severity_boost | {} |
Amazon Simple Storage Service (Amazon S3) is an object storage service that provides industry-leading scalability, data availability, security, and performance. It allows customers of all sizes and industries to store and protect any amount of data for virtually any use case, including data lakes, cloud-native applications, and mobile apps. With cost-effective storage classes and intuitive management features, you can optimize costs, organize data, and configure precise access controls to meet your specific business, organizational, and compliance requirements.
By utilizing S3, businesses of all sizes can efficiently store and protect large amounts of data, ensuring it is accessible when needed. The service's cost-effective storage classes and user-friendly management features help optimize costs and streamline data organization. Additionally, S3's fine-tuned access controls allow organizations to meet specific business, organizational, and compliance requirements, enhancing overall data management and security.
Not implementing Amazon S3 or failing to properly configure it can result in:
Review S3 Service Understanding:
Verify S3 Features Implementation:
Data Privacy and Access Control:
Versioning:
# List all S3 buckets
aws s3api list-buckets --query 'Buckets[].[Name,CreationDate]' --output table
# Get bucket location
aws s3api get-bucket-location --bucket <bucket-name>
# Check versioning status
aws s3api get-bucket-versioning --bucket <bucket-name>
# Review bucket policy
aws s3api get-bucket-policy --bucket <bucket-name> --output json
# Check bucket ACL
aws s3api get-bucket-acl --bucket <bucket-name>
# List access points
aws s3control list-access-points --account-id <account-id>
# Check public access block configuration
aws s3api get-public-access-block --bucket <bucket-name>
# Get bucket encryption
aws s3api get-bucket-encryption --bucket <bucket-name>
Amazon S3 should be properly understood and implemented with:
How Amazon S3 works:
Create a bucket and specify a bucket name and AWS Region:
Upload data to bucket as objects:
Configure features:
Data Privacy:
# Create S3 bucket
aws s3api create-bucket \
--bucket <unique-bucket-name> \
--region <region> \
--create-bucket-configuration LocationConstraint=<region>
# Enable versioning
aws s3api put-bucket-versioning \
--bucket <bucket-name> \
--versioning-configuration Status=Enabled
# Enable encryption
aws s3api put-bucket-encryption \
--bucket <bucket-name> \
--server-side-encryption-configuration '{
"Rules": [{
"ApplyServerSideEncryptionByDefault": {
"SSEAlgorithm": "AES256"
}
}]
}'
# Block public access
aws s3api put-public-access-block \
--bucket <bucket-name> \
--public-access-block-configuration \
"BlockPublicAcls=true,IgnorePublicAcls=true,BlockPublicPolicy=true,RestrictPublicBuckets=true"
# Upload object
aws s3 cp <local-file> s3://<bucket-name>/<key-name>
By default:
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|---|---|---|---|
| v8 | 3.3 Configure Data Access Control Lists Configure data access control lists based on a user's need to know. Apply data access control lists, also known as access permissions, to local and remote file systems, databases, and applications. | ● | ● | ● |
| v8 | 8.3 Ensure Adequate Audit Log Storage Ensure that logging destinations maintain adequate storage to comply with the enterprise's audit log management process. | ● | ● | ● |
| v7 | 13.4 Only Allow Access to Authorized Cloud Storage or Email Providers Only allow access to authorized cloud storage or email providers. | ● | ● | |
| v7 | 14.6 Protect Information through Access Control Lists Protect all information stored on systems with file system, network share, claims, application, or database specific access control lists. These controls will enforce the principle that only authorized individuals should have access to the information based on their need to access the information as a part of their responsibilities. | ● | ● | ● |
Level 2