Reino: Security Features

Segurança de software não é o mesmo que software de segurança. Aqui, estamos interessados em tópicos como autenticação, controle de acesso, confidencialidade, criptografia e gestão de privilégios.

Access Control: Unenforced Sharing Rules

Abstract
A classe Apex contém operações de banco de dados que podem ser executadas sem imposição das regras de compartilhamento do usuário.
Explanation
Os aplicativos Salesforce usam regras de compartilhamento para controlar as permissões do usuário e o acesso aos registros do banco de dados. No entanto, as regras de compartilhamento do usuário nem sempre são aplicadas no Apex porque as classes do Apex podem ser declaradas com diferentes palavras-chave de compartilhamento que alteram a forma como as regras são aplicadas. Uma classe pode ser declarada com uma das três palavras-chave de compartilhamento diferentes:

- with sharing: As regras de compartilhamento do usuário serão aplicadas.
- without sharing: As regras de compartilhamento não serão aplicadas.
- inherited sharing: As regras de compartilhamento da classe de chamada serão aplicadas. Quando a classe de chamada não especificar uma palavra-chave de compartilhamento ou quando a própria classe for um ponto de entrada, como um controlador do Visualforce, as regras de compartilhamento do usuário serão impostas por padrão.

Quando nenhuma das palavras-chave de compartilhamento for declarada, a classe herdará o modo de compartilhamento da classe de chamada, se houver. Caso contrário, as regras de compartilhamento não serão aplicadas.

Exemplo 1: As três classes do Apex a seguir têm palavras-chave de compartilhamento não seguras para suas chamadas de consulta de banco de dados.

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');
}
}
TestClass1 e TestClass2 não são seguros porque os registros podem ser recuperados sem a imposição de regras de compartilhamento do usuário.

TestClass3 é mais seguro porque impõe regras de compartilhamento por padrão. No entanto, o acesso não autorizado ainda poderá ser concedido se a função getAllTheSecrets() for chamada em uma classe que declarar explicitamente without sharing.
References
[1] Using the with sharing, without sharing, and inherited sharing Keywords Salesforce
[2] Sharing Rules Considerations Salesforce
[3] Standards Mapping - Common Weakness Enumeration CWE ID 566
[4] Standards Mapping - Common Weakness Enumeration Top 25 2023 [24] CWE ID 863
[5] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-000213, CCI-001084, CCI-002165
[6] Standards Mapping - FIPS200 AC
[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), SC-3 Security Function Isolation (P1)
[9] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-3 Access Enforcement, SC-3 Security Function Isolation
[10] 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)
[11] Standards Mapping - OWASP Mobile 2014 M5 Poor Authorization and Authentication
[12] Standards Mapping - OWASP Mobile 2024 M3 Insecure Authentication/Authorization
[13] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-AUTH-1
[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
[28] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 5.4 - Authentication and Access Control
[29] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 5.4 - Authentication and Access Control
[30] 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
[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.apex.access_control_unenforced_sharing_rules