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🛡️ Google Storage Bucket is anonymously or publicly accessible🟢

Logic​

Similar Policies​

Description​

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Description​

It is recommended that the IAM policy on a Cloud Storage bucket does not allow anonymous or public access.

Rationale​

Allowing anonymous or public access grants permissions to anyone to access bucket content. Such access might not be desired if you are storing sensitive data. Ensure that anonymous or public access to a bucket is not allowed.

Impact​

No storage buckets would be publicly accessible. You would have to explicitly administer bucket access.

Audit​

From Google Cloud Console​
  1. Go to Storage browser by visiting https://console.cloud.google.com/storage/browser.
  2. Click on each bucket name to go to its Bucket details page.
  3. Click on the Permissions tab.
  4. Ensure that allUsers and allAuthenticatedUsers are not in the Members list.
From Google Cloud CLI​

  1. List all buckets in a project:

    gsutil ls

  2. Check the IAM policy for each bucket:

    gsutil iam get gs://{{bucket-name}}

No role should contain allUsers and/or allAuthenticatedUsers as a member.

... see more

Remediation​

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Remediation​

From Google Cloud Console​

  1. Go to Storage browser by visiting https://console.cloud.google.com/storage/browser.
  2. Click on the bucket name to go to its Bucket details page.
  3. Click on the Permissions tab.
  4. Click Delete in front of allUsers and allAuthenticatedUsers to remove those role assignments.

From Google Cloud CLI​

Remove allUsers and allAuthenticatedUsers access.

gsutil iam ch -d allUsers gs://{{bucket-name}} 
gsutil iam ch -d allAuthenticatedUsers gs://{{bucket-name}}

policy.yaml​

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Linked Framework Sections​

SectionSub SectionsInternal RulesPoliciesFlagsCompliance
💼 CIS GCP v1.2.0 → 💼 5.1 Ensure that Cloud Storage bucket is not anonymously or publicly accessible - Level 1 (Automated)1no data
💼 CIS GCP v1.3.0 → 💼 5.1 Ensure That Cloud Storage Bucket Is Not Anonymously or Publicly Accessible - Level 1 (Automated)1no data
💼 CIS GCP v2.0.0 → 💼 5.1 Ensure That Cloud Storage Bucket Is Not Anonymously or Publicly Accessible - Level 1 (Automated)1no data
💼 CIS GCP v3.0.0 → 💼 5.1 Ensure That Cloud Storage Bucket Is Not Anonymously or Publicly Accessible - Level 1 (Automated)1no data
💼 Cloudaware Framework → 💼 Public Data Access11no data
💼 FedRAMP High Security Controls → 💼 AC-3 Access Enforcement (L)(M)(H)3784no data
💼 FedRAMP High Security Controls → 💼 AC-5 Separation of Duties (M)(H)17no data
💼 FedRAMP High Security Controls → 💼 AC-6 Least Privilege (M)(H)81179no data
💼 FedRAMP High Security Controls → 💼 MP-2 Media Access (L)(M)(H)13no data
💼 FedRAMP Low Security Controls → 💼 AC-3 Access Enforcement (L)(M)(H)84no data
💼 FedRAMP Low Security Controls → 💼 MP-2 Media Access (L)(M)(H)13no data
💼 FedRAMP Moderate Security Controls → 💼 AC-3 Access Enforcement (L)(M)(H)84no data
💼 FedRAMP Moderate Security Controls → 💼 AC-5 Separation of Duties (M)(H)17no data
💼 FedRAMP Moderate Security Controls → 💼 AC-6 Least Privilege (M)(H)679no data
💼 FedRAMP Moderate Security Controls → 💼 MP-2 Media Access (L)(M)(H)13no data
💼 ISO/IEC 27001:2013 → 💼 A.8.2.3 Handling of assets5no data
💼 ISO/IEC 27001:2013 → 💼 A.14.1.3 Protecting application services transactions1015no data
💼 ISO/IEC 27001:2022 → 💼 5.10 Acceptable use of information and other associated assets1127no data
💼 ISO/IEC 27001:2022 → 💼 5.15 Access control1431no data
💼 ISO/IEC 27001:2022 → 💼 8.3 Information access restriction1024no data
💼 ISO/IEC 27001:2022 → 💼 8.4 Access to source code822no data
💼 NIST CSF v1.1 → 💼 DE.CM-1: The network is monitored to detect potential cybersecurity events1863no data
💼 NIST CSF v1.1 → 💼 DE.CM-3: Personnel activity is monitored to detect potential cybersecurity events2026no data
💼 NIST CSF v1.1 → 💼 PR.AC-1: Identities and credentials are issued, managed, verified, revoked, and audited for authorized devices, users and processes1934no data
💼 NIST CSF v1.1 → 💼 PR.AC-4: Access permissions and authorizations are managed, incorporating the principles of least privilege and separation of duties1756no data
💼 NIST CSF v1.1 → 💼 PR.AC-5: Network integrity is protected (e.g., network segregation, network segmentation)1044no data
💼 NIST CSF v1.1 → 💼 PR.AC-6: Identities are proofed and bound to credentials and asserted in interactions413no data
💼 NIST CSF v1.1 → 💼 PR.DS-1: Data-at-rest is protected1530no data
💼 NIST CSF v1.1 → 💼 PR.DS-2: Data-in-transit is protected1653no data
💼 NIST CSF v1.1 → 💼 PR.DS-3: Assets are formally managed throughout removal, transfers, and disposition8no data
💼 NIST CSF v1.1 → 💼 PR.DS-5: Protections against data leaks are implemented4791no data
💼 NIST CSF v1.1 → 💼 PR.DS-6: Integrity checking mechanisms are used to verify software, firmware, and information integrity2227no data
💼 NIST CSF v1.1 → 💼 PR.IP-6: Data is destroyed according to policy5no data
💼 NIST CSF v1.1 → 💼 PR.PT-2: Removable media is protected and its use restricted according to policy5no data
💼 NIST CSF v1.1 → 💼 PR.PT-4: Communications and control networks are protected1044no data
💼 NIST CSF v2.0 → 💼 DE.CM-01: Networks and network services are monitored to find potentially adverse events180no data
💼 NIST CSF v2.0 → 💼 DE.CM-03: Personnel activity and technology usage are monitored to find potentially adverse events100no data
💼 NIST CSF v2.0 → 💼 DE.CM-09: Computing hardware and software, runtime environments, and their data are monitored to find potentially adverse events181no data
💼 NIST CSF v2.0 → 💼 ID.AM-08: Systems, hardware, software, services, and data are managed throughout their life cycles27no data
💼 NIST CSF v2.0 → 💼 PR.AA-01: Identities and credentials for authorized users, services, and hardware are managed by the organization43no data
💼 NIST CSF v2.0 → 💼 PR.AA-02: Identities are proofed and bound to credentials based on the context of interactions13no data
💼 NIST CSF v2.0 → 💼 PR.AA-05: Access permissions, entitlements, and authorizations are defined in a policy, managed, enforced, and reviewed, and incorporate the principles of least privilege and separation of duties133no data
💼 NIST CSF v2.0 → 💼 PR.AA-06: Physical access to assets is managed, monitored, and enforced commensurate with risk44no data
💼 NIST CSF v2.0 → 💼 PR.DS-01: The confidentiality, integrity, and availability of data-at-rest are protected187no data
💼 NIST CSF v2.0 → 💼 PR.DS-02: The confidentiality, integrity, and availability of data-in-transit are protected160no data
💼 NIST CSF v2.0 → 💼 PR.DS-10: The confidentiality, integrity, and availability of data-in-use are protected184no data
💼 NIST CSF v2.0 → 💼 PR.IR-01: Networks and environments are protected from unauthorized logical access and usage123no data
💼 NIST SP 800-53 Revision 4 → 💼 AC-2 ACCOUNT MANAGEMENT1336no data
💼 NIST SP 800-53 Revision 5 → 💼 AC-3 Access Enforcement15559no data
💼 NIST SP 800-53 Revision 5 → 💼 AC-5 Separation of Duties17no data
💼 NIST SP 800-53 Revision 5 → 💼 AC-6 Least Privilege102372no data
💼 NIST SP 800-53 Revision 5 → 💼 MP-2 Media Access213no data
💼 PCI DSS v3.2.1 → 💼 1.2.1 Restrict inbound and outbound traffic to that which is necessary for the cardholder data environment, and specifically deny all other traffic.1065no data
💼 PCI DSS v3.2.1 → 💼 7.1 Limit access to system components and cardholder data to only those individuals whose job requires such access.48no data
💼 PCI DSS v4.0.1 → 💼 1.3.1 Inbound traffic to the CDE is restricted.65no data
💼 PCI DSS v4.0.1 → 💼 1.3.2 Outbound traffic from the CDE is restricted.65no data
💼 PCI DSS v4.0 → 💼 1.3.1 Inbound traffic to the CDE is restricted.765no data
💼 PCI DSS v4.0 → 💼 1.3.2 Outbound traffic from the CDE is restricted.65no data
💼 SOC 2 → 💼 CC5.2-3 Establishes Relevant Security Management Process Controls Activities1536no data
💼 SOC 2 → 💼 CC6.1-3 Restricts Logical Access122no data
💼 SOC 2 → 💼 CC6.1-7 Restricts Access to Information Assets1327no data