界: Security Features

ソフトウェアのセキュリティは、セキュリティ ソフトウェアではありません。ここでは、認証、アクセス制御、機密性、暗号化、権限管理などのトピックについて説明します。

Access Control: Unenforced Sharing Rules

Abstract
Apex クラスには、ユーザー共有ルールを強制せずに実行できるデータベース操作が含まれています。
Explanation
Salesforce アプリケーションは、共有ルールを使用して、ユーザー権限とデータベース レコードへのアクセスを制御します。ただし、Apex クラスは、ルールの適用方法を変えるさまざまな共有キーワードを使用して宣言できるため、ユーザー共有ルールが Apex で常に適用されるわけではありません。クラスは、次の 3 つの異なる共有キーワードのいずれかで宣言できます。
- with sharing: ユーザー共有ルールが適用されます。
- without sharing: 共有ルールは適用されません。
- inherited sharing: 呼び出し元のクラスの共有ルールが適用されます。呼び出し元のクラスで共有キーワードが指定されていない場合、またはクラス自体が Visualforce コントローラーなどのエントリポイントである場合、デフォルトでユーザー共有ルールが適用されます。
共有キーワードが宣言されていない場合、クラスは呼び出し元のクラスの共有モードを継承します (ある場合)。そうしないと、共有ルールが適用されません。
例 1: 次の 3 つのすべての Apex クラスには、データベース クエリ呼び出しについて安全でない共有キーワードがあります。

public class TestClass1 {
public List<Contact> getAllTheSecrets() {
return Database.query('SELECT Name FROM Contact');
}
}
public without sharing class TestClass2 {
public List<Contact> getAllTheSecrets() {
return Database.query('SELECT Name FROM Contact');
}
}
public inherited sharing class TestClass3 {
public List<Contact> getAllTheSecrets() {
return Database.query('SELECT Name FROM Contact');
}
}
TestClass1TestClass2 はどちらも安全ではありません。ユーザー共有ルールを強制しなくてもレコードを取得できるためです。
TestClass3 の方が、デフォルトで共有ルールが適用されるため、より安全です。ただし、関数 getAllTheSecrets() が、without sharing を明示的に宣言するクラスで呼び出されると、不正アクセスが許可される可能性はあります。
References
[1] Using the with sharing, without sharing, and inherited sharing Keywords Salesforce
[2] Sharing Rules Considerations Salesforce
[3] Standards Mapping - CIS Azure Kubernetes Service Benchmark 3.0
[4] Standards Mapping - CIS Amazon Elastic Kubernetes Service Benchmark 1.0
[5] Standards Mapping - CIS Amazon Web Services Foundations Benchmark 1
[6] Standards Mapping - CIS Google Kubernetes Engine Benchmark confidentiality
[7] Standards Mapping - CIS Kubernetes Benchmark complete
[8] Standards Mapping - Common Weakness Enumeration CWE ID 566
[9] Standards Mapping - Common Weakness Enumeration Top 25 2023 [24] CWE ID 863
[10] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-000213, CCI-001084, CCI-002165
[11] Standards Mapping - FIPS200 AC
[12] Standards Mapping - General Data Protection Regulation (GDPR) Access Violation
[13] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-3 Access Enforcement (P1), SC-3 Security Function Isolation (P1)
[14] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-3 Access Enforcement, SC-3 Security Function Isolation
[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 Application Security Verification Standard 4.0 4.1.2 General Access Control Design (L1 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), 13.4.2 GraphQL and other Web Service Data Layer Security Requirements (L2 L3)
[22] Standards Mapping - OWASP Mobile 2014 M5 Poor Authorization and Authentication
[23] Standards Mapping - OWASP Mobile 2024 M3 Insecure Authentication/Authorization
[24] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-AUTH-1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.2
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.5.4
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.8
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.8
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.8
[30] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.8
[31] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.8
[32] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[33] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 5.4 - Authentication and Access Control
[34] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 5.4 - Authentication and Access Control
[35] 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
[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 - Security Technical Implementation Guide Version 5.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II
[58] Standards Mapping - Web Application Security Consortium Version 2.00 Insufficient Authorization (WASC-02)
[59] Standards Mapping - Web Application Security Consortium 24 + 2 Insufficient Authorization
desc.structural.apex.access_control_unenforced_sharing_rules