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AWS CloudFormation Misconfiguration: Improper Lambda Access Control Policy

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YAML

Abstract

範本定義一個萬用字元 lambda 主體。

Explanation

lambda 主體的萬用字元組態違反最小特權原則，允許攻擊者從任何帳戶叫用 lambda。

範例 1：以下範例範本定義一個萬用字元 lambda 主體。


{
    "Resources": {
        "LambdaPerm": {
            "Type": "AWS::Lambda::Permission",
            "Properties": {
            "SourceAccount": "AWS::AccountId",
            "SourceArn": "bucket.Arn",
            "FunctionName": "function.Arn",
            "Action": "lambda:InvokeFunction",
            "Principal": "*"
            }
        }
    },
    "AWSTemplateFormatVersion": "2010-09-09",
    "Description": "Lambda Permission"
}

References

[1] Amazon Web Services Security in AWS Lambda

[2] Amazon Web Services AWS Documentation: AWS::Lambda::Permission

[3] Standards Mapping - CIS Azure Kubernetes Service Benchmark 1.0

[4] Standards Mapping - CIS Amazon Elastic Kubernetes Service Benchmark 2.0

[5] Standards Mapping - CIS Amazon Web Services Foundations Benchmark 1

[6] Standards Mapping - CIS Google Kubernetes Engine Benchmark confidentiality

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

[8] Standards Mapping - Common Weakness Enumeration Top 25 2020 [18] CWE ID 522

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

[10] Standards Mapping - Common Weakness Enumeration Top 25 2022 [16] CWE ID 862

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

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

[13] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-6 Least Privilege (P1)

[14] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-6 Least Privilege

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[33] 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[56] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-000460 CAT I, APSC-DV-000470 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.json.aws_cloudformation_misconfiguration_improper_lambda_access_control_policy.base

Abstract

範本定義一個萬用字元 lambda 主體。

Explanation

lambda 主體的萬用字元組態違反最小特權原則，允許攻擊者從任何帳戶叫用 lambda。

範例 1：以下範例範本定義一個萬用字元 lambda 主體。


AWSTemplateFormatVersion: "2010-09-09"
Description: Lambda Permission
Resources:
  LambdaPerm:
  Type: AWS::Lambda::Permission
  Properties:
    FunctionName: !GetAtt function.Arn
    Action: lambda:InvokeFunction
    Principal: "*"
    SourceAccount: !Ref "AWS::AccountId"
    SourceArn: !GetAtt bucket.Arn