Ensure S3 bucket policy does not allow public read access
S3 bucket policies should not contain statements that allow public read access. Policies with Principal:* or Principal:AWS:* combined with s3:GetObject allow anyone to read bucket contents.
Security Impact
Public read access exposes all bucket data to anyone on the internet, potentially leaking sensitive information.
How to Remediate
Review bucket policies and remove statements that allow public read access. Use pre-signed URLs or CloudFront with OAI for controlled public access when needed.
Affected Resources
Compliance Frameworks
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:
- Continuous Scanning
Automatically scans all Simple Storage Service (S3) resources across your AWS accounts every hour
- Instant Alerts
Get notified via Slack, email, or webhooks when this misconfiguration is detected
- One-Click Remediation
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- Compliance Evidence
Automatically collect audit evidence for CIS AWS v1.5.0, CIS AWS v2.0, SOC 2 compliance
- Drift Detection
Get alerted if this configuration drifts back to an insecure state after remediation
Check Details
- Check ID
- aws-s3-2
- Service
- Simple Storage Service (S3)
- Category
- Public Access
- Severity
- CRITICAL
- CIS Benchmark
- 2.1.2
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