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Azure ARM Misconfiguration: Improper Compute VM Access Control

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Abstract

範本將定義一個允許 SSH 基本驗證的 VM。

Explanation

受基本驗證保護的系統為攻擊者提供了一個潛在弱連結。攻擊者可透過暴力破解、猜測或社交工程破解密碼 (尤其是低強度的密碼)。

範例 1：以下範例顯示允許 SSH 基本驗證的 VM。


resource example 'Microsoft.Compute/virtualMachines@2021-03-01' = {
    ...
    properties: {
        ...
        osProfile: {
            ...
            linuxConfiguration: {
                ...
                disablePasswordAuthentication: false
            }
        }
    }
}

References

[1] Yanelis Lopez Eliminate Password-Based Attacks on Azure Linux VMs

[2] Robert Ford No more passwords: the relentless commitment to creating a password-less world at Microsoft

[3] Microsoft Azure Documentation: Microsoft.Compute virtualMachines

[4] Standards Mapping - CIS Azure Kubernetes Service Benchmark 4.5

[5] Standards Mapping - CIS Microsoft Azure Foundations Benchmark Partial

[6] Standards Mapping - CIS Amazon Elastic Kubernetes Service Benchmark 5.0

[7] Standards Mapping - CIS Amazon Web Services Foundations Benchmark 2

[8] Standards Mapping - CIS Google Kubernetes Engine Benchmark Integrity

[9] Standards Mapping - CIS Kubernetes Benchmark Partial

[10] Standards Mapping - Common Weakness Enumeration CWE ID 287

[11] Standards Mapping - Common Weakness Enumeration Top 25 2019 [13] CWE ID 287

[12] Standards Mapping - Common Weakness Enumeration Top 25 2020 [14] CWE ID 287

[13] Standards Mapping - Common Weakness Enumeration Top 25 2021 [14] CWE ID 287, [16] CWE ID 798

[14] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001958

[15] Standards Mapping - FIPS200 CM

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

[17] Standards Mapping - NIST Special Publication 800-53 Revision 4 IA-8 Identification and Authentication (Non-Organizational Users) (P1)

[18] Standards Mapping - NIST Special Publication 800-53 Revision 5 IA-8 Identification and Authentication (Non-Organizational Users)

[19] Standards Mapping - OWASP Top 10 2004 A10 Insecure Configuration Management

[20] Standards Mapping - OWASP Top 10 2007 A7 Broken Authentication and Session Management

[21] Standards Mapping - OWASP Top 10 2010 A6 Security Misconfiguration

[22] Standards Mapping - OWASP Top 10 2013 A2 Broken Authentication and Session Management

[23] Standards Mapping - OWASP Top 10 2017 A2 Broken Authentication

[24] Standards Mapping - OWASP Top 10 2021 A07 Identification and Authentication Failures

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

[26] Standards Mapping - OWASP Application Security Verification Standard 4.0 2.7.1 Out of Band Verifier Requirements (L1 L2 L3), 2.7.2 Out of Band Verifier Requirements (L1 L2 L3), 2.7.3 Out of Band Verifier Requirements (L1 L2 L3), 2.8.4 Single or Multi Factor One Time Verifier Requirements (L2 L3), 2.8.5 Single or Multi Factor One Time Verifier Requirements (L2 L3), 3.7.1 Defenses Against Session Management Exploits (L1 L2 L3), 9.2.3 Server Communications Security Requirements (L2 L3)

[27] Standards Mapping - OWASP Mobile 2014 M5 Poor Authorization and Authentication

[28] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.10

[29] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.5.7

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

[31] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.10

[32] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.10

[33] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.10

[34] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.10

[35] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4

[36] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 5.3 - Authentication and Access Control

[37] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 5.3 - Authentication and Access Control

[38] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 5.3 - Authentication and Access Control, Control Objective C.2.1.2 - Web Software Access Controls

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

[40] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-001650 CAT II

[41] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-001650 CAT II

[42] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-001650 CAT II

[43] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-001650 CAT II

[44] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-001650 CAT II

[45] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-001650 CAT II

[46] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-001650 CAT II

[47] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-001650 CAT II

[48] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-001650 CAT II

[49] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-001650 CAT II

[50] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-001650 CAT II

[51] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-001650 CAT II

[52] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-001650 CAT II

[53] Standards Mapping - Web Application Security Consortium Version 2.00 Server Misconfiguration (WASC-14)

desc.structural.bicep.azure_arm_misconfiguration_improper_compute_vm_access_control

Abstract

範本將定義一個允許 SSH 基本驗證的 VM。

Explanation


{
    "resources": [
        {
            "type": "Microsoft.Compute/virtualMachines",
            "apiVersion": "2021-03-01",
            "name": "[variables('vmName')]",
            "location": "[parameters('location')]",
            ...
            "osProfile": {
                "computerName": "[variables('vmName')]",
                "adminUsername": "[parameters('adminUsername')]",
                "linuxConfiguration": {
                    "disablePasswordAuthentication": false
                }
            },
            ...
        }
    ]
}