Kingdom: Security Features

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Azure ARM Misconfiguration: Improper Container Registry Network Access Control

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Abstract

The template defines an Azure Container Registry with unrestricted network access.

Explanation

Insufficient access configurations expose systems and broaden an organization's attack surface. Services open to interaction with the internet are subject to continuous scanning and probing by malicious entities.

This is especially problematic when a zero-day exploit for an exposed service is discovered and published (e.g Heartbleed). Attackers can actively pursue and search for unpatched and exposed systems to exploit.

Example 1: The following example template defines an Azure Container Registry with unrestricted network access by enabling the property publicNetworkAccess and making no IP restrictions.


resource example 'Microsoft.ContainerRegistry/registries@2022-12-01' = {
    ...
    properties: {
        ...
        publicNetworkAccess: 'Enabled'
    }
}

Example 2: The following example template defines an Azure Container Registry with unrestricted network access by specifying a broad allow list for the networkRuleSet property.


resource example 'Microsoft.ContainerRegistry/registries@2022-12-01' = {
    ...
    properties: {
        ...
        publicNetworkAccess: 'Enabled'
        networkRuleSet: {
            defaultAction: 'Allow'
            ipRules: [
                {
                    action: 'Allow'
                    value: '*'
                }
            ]
        }
    }
}

References

[1] Microsoft Azure Container Registry Documentation - Configure public IP network rules

[2] Microsoft Azure security baseline for Container Registry

[3] Microsoft Restrict access to a container registry using a service endpoint in an Azure virtual network

[4] Microsoft Connect privately to an Azure container registry using Azure Private Link

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

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

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

[8] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-000213, CCI-001084, CCI-002038, CCI-002165

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

[10] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-3 Access Enforcement (P1), AC-6 Least Privilege (P1), CM-5 Access Restrictions for Change (P1), IA-11 Re-Authentication (P0), SC-3 Security Function Isolation (P1)

[11] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-3 Access Enforcement, AC-6 Least Privilege, CM-5 Access Restrictions for Change, SC-3 Security Function Isolation, SC-11 Trusted Path

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4, Requirement 1.4.2

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

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

[31] 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[55] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001410 CAT II, APSC-DV-001520 CAT II, APSC-DV-002360 CAT II

[56] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001410 CAT II, APSC-DV-001520 CAT II, APSC-DV-002360 CAT II

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

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

desc.structural.bicep.azure_arm_misconfiguration_improper_container_registry_network_access_control

Abstract

The template defines an Azure Container Registry with unrestricted network access.

Explanation


{
    "name": "[variables('acrName')]",
    "type": "Microsoft.ContainerRegistry/registries",
    ...
    "properties": {
        "publicNetworkAccess": "Enabled",
        ..
}

Example 2: The following example template defines an Azure Container Registry with unrestricted network access by specifying a broad allow list for the networkRuleSet property.


{
    "name": "[variables('acrName')]",
    "type": "Microsoft.ContainerRegistry/registries",
    ...
    "properties": {
        "publicNetworkAccess": "Enabled",
        "networkRuleSet":
        {
            "defaultAction": "Allow",
            "ipRules":[{
                "action": "Allow",
                "value": "*"
            }]
        }
        ...
}