GCP Terraform Misconfiguration: GKE Cluster Legacy Authorization

Abstract

Terraform 組態在 GKE 叢集上啟用了舊版 ABAC 授權。

Explanation

依預設，在執行 GKE 1.8 及更高版本的新叢集上，會停用屬性型存取控制 (ABAC)。除了角色型存取控制 (RBAC) 或 Identity and Access Management (IAM) 提供的權限之外，ABAC 還可以靜態授予特定使用者或群組存取資源的權限。這造成授權管理複雜化，也破壞了集中化存取控制機制。

範例 1：以下範例顯示一個 Terraform 組態，其透過將 enable_legacy_abac 設定為 true，在 GKE 叢集上啟用了舊版 ABAC 授權。


resource "google_container_cluster" "container_cluster_demo" {
...
  enable_legacy_abac = true
...
}

References

[1] HashiCorp google_container_cluster

[2] Google Cloud Setting the default node image type

[3] Google Cloud Configure role-based access control

[4] Standards Mapping - CIS Google Kubernetes Engine Benchmark Recommendation 5.8.4

[5] Standards Mapping - Common Weakness Enumeration CWE ID 637

[6] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-000213, CCI-002165

[7] Standards Mapping - FIPS200 AC

[8] Standards Mapping - General Data Protection Regulation (GDPR) Access Violation

[9] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-3 Access Enforcement (P1)

[10] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-3 Access Enforcement

[11] Standards Mapping - OWASP API 2023 API8 Security Misconfiguration

[12] Standards Mapping - OWASP Application Security Verification Standard 4.0 1.4.4 Access Control Architectural Requirements (L2 L3), 4.1.3 General Access Control Design (L1 L2 L3), 4.1.5 General Access Control Design (L1 L2 L3), 4.2.1 Operation Level Access Control (L1 L2 L3), 13.1.4 Generic Web Service Security Verification Requirements (L2 L3)

[13] Standards Mapping - OWASP Top 10 2017 A5 Broken Access Control

[14] Standards Mapping - OWASP Top 10 2021 A01 Broken Access Control

[15] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.8, Requirement 7.2

[16] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4, Requirement 7.3.1

[17] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4, Requirement 7.3.1

[18] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 5.4 - Authentication and Access Control

[19] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 5.4 - Authentication and Access Control

[20] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 5.4 - Authentication and Access Control, Control Objective C.2.3 - Web Software Access Controls

[21] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II

[22] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II

[23] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II

[24] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II

[25] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II

[26] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II

desc.structural.hcl.gcp_terraform_misconfiguration_gke_cluster_legacy_authorization