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Not restricting public access on a S3 bucket can lead to data leakage

SeverityExploitabilityProvidersCategories
HIGHHIGHAWSDATA

Description#

AWS S3 Block Public Access is a feature that allows setting up centralized controls to manage public access to S3 resources.

Enforcing the RestrictPublicBuckets rule on a bucket allows to make sure only AWS service principals and authorized users within the bucket owner's account will be able to access the bucket.

Impact#

Potential data exposureVisible in logsUser interaction requiredPrivileges required
TrueTrueFalseFalse
  • Data leakage.
  • Data tampering.

Remediation guidelines#

Associate a S3 BlockPublicAccess with RestrictPublicBuckets enabled to the bucket.

References#