CRITICAL

Ensure S3 bucket ACL does not grant public write access

S3 bucket ACLs must never grant write access to AllUsers or AuthenticatedUsers groups. This legacy permission is extremely dangerous.

Security Impact

Public write access via ACL allows anyone to upload malicious files, overwrite existing data, or delete objects.

How to Remediate

Remove WRITE, WRITE_ACP, and FULL_CONTROL permissions for AllUsers and AuthenticatedUsers from bucket ACL immediately.

Affected Resources

AWS::S3::Bucket

Compliance Frameworks

SOC 2PCI-DSSHIPAAGDPR

How TigerGate Helps

TigerGate continuously monitors your AWS environment to detect and alert on this misconfiguration. Here's what our platform does for this specific check:

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  • Instant Alerts

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  • One-Click Remediation

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  • Compliance Evidence

    Automatically collect audit evidence for SOC 2, PCI-DSS, HIPAA compliance

  • Drift Detection

    Get alerted if this configuration drifts back to an insecure state after remediation

Check Details

Check ID
aws-s3-9
Service
Simple Storage Service (S3)
Category
Public Access
Severity
CRITICAL

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