Kingdom: Security Features

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Azure ARM Misconfiguration: Improper AKS Network Access Control

Bicep
JSON

Abstract

The template fails to restrict access to a Kubernetes API server.

Explanation

A publicly accessible Kubernetes API server can expose the organization to attack.

Example 1: The following example shows a template that defines a Kubernetes service cluster that does not restrict the range of IP addresses that are allowed to connect to the API server.


param location string = resourceGroup().location

resource example 'Microsoft.ContainerService/managedClusters@2020-02-01' = {
    name: 'TestCluster'
    location: location
    properties: {
        ...
        servicePrincipalProfile: {
            clientId: '422313d8-123a-41ea-8f8e-90821ff61c05'
            secret: 'xxxxxxxxxxxxxxxxx'
        }
    }
}

References

[1] microsoft Secure access to the API server using authorized IP address ranges in Azure Kubernetes Service (AKS)

[2] Standards Mapping - CIS Azure Kubernetes Service Benchmark Recommendation 5.4.2

[3] Standards Mapping - Common Weakness Enumeration CWE ID 749

[4] Standards Mapping - Common Weakness Enumeration Top 25 2020 [25] CWE ID 862

[5] Standards Mapping - Common Weakness Enumeration Top 25 2021 [18] CWE ID 862

[6] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-000213, CCI-001084, CCI-002165

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

[8] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-3 Access Enforcement (P1), AC-6 Least Privilege (P1), SC-3 Security Function Isolation (P1)

[9] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-3 Access Enforcement, AC-6 Least Privilege, SC-3 Security Function Isolation

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

[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 4.1.3 General Access Control Design (L1 L2 L3)

[12] Standards Mapping - OWASP Top 10 2004 A2 Broken Access Control

[13] Standards Mapping - OWASP Top 10 2007 A4 Insecure Direct Object Reference

[14] Standards Mapping - OWASP Top 10 2010 A4 Insecure Direct Object References

[15] Standards Mapping - OWASP Top 10 2013 A4 Insecure Direct Object References

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

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

[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.2

[19] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.5.4

[20] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.8

[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.8

[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.8

[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.8

[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.8

[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4, Requirement 1.4.2

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

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

[28] 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

[29] Standards Mapping - SANS Top 25 2009 Porous Defenses - CWE ID 285

[30] Standards Mapping - SANS Top 25 2010 Porous Defenses - CWE ID 863

[31] Standards Mapping - SANS Top 25 2011 Porous Defenses - CWE ID 863

[32] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3480.1 CAT II

[33] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3480.1 CAT I

[34] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3480.1 CAT I

[35] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3480.1 CAT I

[36] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3480.1 CAT I

[37] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3480.1 CAT I

[38] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3480.1 CAT I

[39] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[40] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[41] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[42] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[43] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[44] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[45] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[46] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[47] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[48] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[49] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[50] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[51] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[52] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[53] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[54] Standards Mapping - Web Application Security Consortium Version 2.00 Insufficient Authorization (WASC-02)

[55] Standards Mapping - Web Application Security Consortium 24 + 2 Insufficient Authorization

desc.structural.bicep.azure_arm_misconfiguration_improper_aks_network_access_control

Abstract

The template fails to restrict access to a Kubernetes API server.

Explanation


{
    "name": "TestCluster",
    "type": "Microsoft.ContainerService/managedClusters",
    "apiVersion": "2020-02-01",
    "location": "[resourceGroup().location]",
    "properties": {
    ...
    "servicePrincipalProfile": {
        "clientId": "422313d8-123a-41ea-8f8e-90821ff61c05",
        "secret": "xxxxxxxxxxxxxxxxx"
    },
    }
}