Kingdom: Environment
This section includes everything that is outside of the source code but is still critical to the security of the product that is being created. Because the issues covered by this kingdom are not directly related to source code, we separated it from the rest of the kingdoms.
GCP Terraform Misconfiguration: GKE Cluster Legacy Authorization
Abstract
A Terraform configuration enables legacy ABAC authorization on a GKE cluster.
Explanation
By default, Attribute-Based Access Control (ABAC) is disabled on new clusters that run GKE version 1.8 and later. ABAC can statically grant a specific user or a group access to a resource in addition to those provided by Role-Based Access Control (RBAC) or Identity and Access Management (IAM). This complicates authorization administration and undermines the centralized access control.
Example 1: The following example shows a Terraform configuration that enables legacy ABAC authorization on a GKE cluster by setting
Example 1: The following example shows a Terraform configuration that enables legacy ABAC authorization on a GKE cluster by setting
enable_legacy_abac to true.
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