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Chapter 113 · Securing S3 Buckets
Subchapter 113.3
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Minimum IAM permissions required for each workflow. Use aws iam simulate-principal-policy to validate effective permissions before write operations.
| Workflow | Minimum permissions needed |
|---|
| A — Secure New Bucket | s3:CreateBucket, s3:PutBucketVersioning, s3:PutEncryptionConfiguration, s3:PutBucketLogging, s3:PutBucketPolicy, s3:GetBucketPolicy, s3:PutBucketAbacStatus, cloudtrail:DescribeTrails, cloudtrail:PutEventSelectors |
| B — Audit | s3:GetBucketPublicAccessBlock, s3:GetBucketAcl, s3:GetBucketOwnershipControls, s3:GetEncryptionConfiguration, s3:GetBucketVersioning, s3:GetBucketLogging, s3:GetBucketPolicy, s3:GetBucketObjectLockConfiguration, accessanalyzer:ListAnalyzers, accessanalyzer:ListFindings, cloudtrail:GetEventSelectors, cloudtrail:DescribeTrails, guardduty:ListDetectors, guardduty:GetDetector |
| C — Remediate | s3:PutBucketPublicAccessBlock, s3:GetBucketPolicy, s3:PutBucketPolicy, s3:PutEncryptionConfiguration, kms:CreateKey, kms:PutKeyPolicy, kms:DescribeKey, iam:SimulatePrincipalPolicy |
| D — Encryption | s3:PutEncryptionConfiguration, kms:CreateKey, kms:PutKeyPolicy, kms:DescribeKey |
| E — Monitoring | cloudtrail:DescribeTrails, cloudtrail:PutEventSelectors, guardduty:ListDetectors, guardduty:CreateDetector, config:PutConfigRule |