Ensure S3 bucket ACL does not grant public read access
S3 bucket ACLs should not grant read access to AllUsers or AuthenticatedUsers groups. These legacy permissions can inadvertently expose bucket contents.
Security Impact
ACL-based public access allows anyone (AllUsers) or any AWS account (AuthenticatedUsers) to list and read bucket contents.
How to Remediate
Remove AllUsers and AuthenticatedUsers grantees from bucket ACL. Prefer bucket policies over ACLs for access control.
Affected Resources
Compliance Frameworks
How TigerGate Helps
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- Continuous Scanning
Automatically scans all Simple Storage Service (S3) resources across your AWS accounts every hour
- Instant Alerts
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- One-Click Remediation
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- Compliance Evidence
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- Drift Detection
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Check Details
- Check ID
- aws-s3-8
- Service
- Simple Storage Service (S3)
- Category
- Public Access
- Severity
- CRITICAL
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