Reino: Security Features

La seguridad de un software no es un software de seguridad. Nos preocupamos de cuestiones como la autenticación, el control de acceso, la confidencialidad, la criptografía y la gestión de privilegios.

Privacy Violation: iCloud Synchronized Credentials

Objective-C
Swift

Abstract

El método identificado inicializa una nueva NSURLCredential que puede sincronizarse y que se distribuirá a todos los dispositivos sincronizados y se almacenará en el entorno iCloud de Apple.

Explanation

Cuando se crea una instancia de NSURLCredential que contiene las credenciales del usuario en forma de un par nombre de usuario/contraseña o un certificado de cliente, debe definirse un atributo de persistencia. Los valores posibles son los siguientes:

- NSURLCredentialPersistenceNone: no se debe almacenar la credencial.
- NSURLCredentialPersistenceForSession: solo se debe almacenar la credencial para esta sesión.
- NSURLCredentialPersistencePermanent: la credencial debe almacenarse en las llaves.
- NSURLCredentialPersistenceSynchronizable: la credencial debe almacenarse de manera permanente en las llaves y, además, debe distribuirse a otros dispositivos basándose en la ID de Apple de propietario.

El atributo NSURLCredentialPersistenceSynchronizable implica la distribución de la credencial y su almacenamiento en el entorno de la nube de Apple. Según los requisitos de privacidad de la aplicación, el almacenamiento de la credencial en el entorno de la nube de Apple puede no ser aceptable.

Ejemplo 1: el siguiente fragmento de código crea una credencial que puede sincronizarse y que se distribuirá a otros dispositivos y en iCloud:


    ...
    NSURLCredential *credential = [NSURLCredential credentialWithUser:user password:password persistence:NSURLCredentialPersistenceSynchronizable]; 
    NSURLCredentialStorage *shared = [NSURLCredentialStorage sharedCredentialStorage];
    [shared setDefaultCredential:credential forProtectionSpace:protectionSpace]; 
    ...

References

[1] David Thiel iOS Application Security: The Definitive Guide for Hackers and Developers No Starch Press

[2] Standards Mapping - Common Weakness Enumeration CWE ID 359

[3] Standards Mapping - Common Weakness Enumeration Top 25 2019 [4] CWE ID 200

[4] Standards Mapping - Common Weakness Enumeration Top 25 2020 [7] CWE ID 200

[5] Standards Mapping - Common Weakness Enumeration Top 25 2021 [20] CWE ID 200

[6] Standards Mapping - Common Weakness Enumeration Top 25 2024 [17] CWE ID 200

[7] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002475

[8] Standards Mapping - General Data Protection Regulation (GDPR) Privacy Violation

[9] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-4 Information Flow Enforcement (P1), SC-28 Protection of Information at Rest (P1)

[10] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-4 Information Flow Enforcement, SC-28 Protection of Information at Rest

[11] Standards Mapping - OWASP API 2023 API3 Broken Object Property Level Authorization

[12] Standards Mapping - OWASP Application Security Verification Standard 4.0 8.2.2 Client-side Data Protection (L1 L2 L3), 8.3.4 Sensitive Private Data (L1 L2 L3), 10.2.1 Malicious Code Search (L2 L3)

[13] Standards Mapping - OWASP Mobile 2014 M2 Insecure Data Storage

[14] Standards Mapping - OWASP Mobile 2024 M6 Inadequate Privacy Controls

[15] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-STORAGE-1

[16] Standards Mapping - OWASP Top 10 2004 A8 Insecure Storage

[17] Standards Mapping - OWASP Top 10 2007 A6 Information Leakage and Improper Error Handling

[18] Standards Mapping - OWASP Top 10 2013 A6 Sensitive Data Exposure

[19] Standards Mapping - OWASP Top 10 2017 A3 Sensitive Data Exposure

[20] Standards Mapping - OWASP Top 10 2021 A02 Cryptographic Failures

[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 3.2, Requirement 3.4, Requirement 4.2, Requirement 8.4

[22] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 3.2, Requirement 3.4, Requirement 4.2, Requirement 6.5.6, Requirement 8.4

[23] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 3.2, Requirement 3.4, Requirement 4.2, Requirement 6.5.5, Requirement 8.4

[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 3.2, Requirement 3.4, Requirement 4.2, Requirement 6.5.5, Requirement 8.2.1

[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 3.2, Requirement 3.4, Requirement 4.2, Requirement 6.5.5, Requirement 8.2.1

[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 3.2, Requirement 3.4, Requirement 4.2, Requirement 6.5.5, Requirement 8.2.1

[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 3.2, Requirement 3.4, Requirement 4.2, Requirement 6.5.5, Requirement 8.2.1

[28] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 3.3.1, Requirement 3.5.1, Requirement 4.2.2, Requirement 6.2.4, Requirement 8.3.1

[29] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 3.3.1, Requirement 3.3.2, Requirement 3.3.3, Requirement 3.5.1, Requirement 4.2.2, Requirement 6.2.4, Requirement 8.3.1

[30] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 3.3 - Sensitive Data Retention, Control Objective 6.1 - Sensitive Data Protection, Control Objective 7 - Use of Cryptography

[31] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 3.3 - Sensitive Data Retention, Control Objective 6.1 - Sensitive Data Protection, Control Objective 7 - Use of Cryptography

[32] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 3.3 - Sensitive Data Retention, Control Objective 6.1 - Sensitive Data Protection, Control Objective 7 - Use of Cryptography

[33] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3210.1 CAT II, APP3310 CAT I, APP3340 CAT I

[34] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3210.1 CAT II, APP3340 CAT I

[35] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3210.1 CAT II, APP3340 CAT I

[36] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3210.1 CAT II, APP3340 CAT I

[37] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3210.1 CAT II, APP3340 CAT I

[38] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3210.1 CAT II, APP3340 CAT I

[39] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3210.1 CAT II, APP3340 CAT I

[40] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002340 CAT II

[41] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002340 CAT II

[42] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002340 CAT II

[43] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002340 CAT II

[44] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002340 CAT II

[45] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002340 CAT II

[46] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002340 CAT II

[47] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002340 CAT II

[48] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002340 CAT II

[49] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002340 CAT II

[50] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002340 CAT II

[51] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002340 CAT II

[52] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002340 CAT II

[53] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002340 CAT II

[54] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002340 CAT II

[55] Standards Mapping - Web Application Security Consortium Version 2.00 Information Leakage (WASC-13)

[56] Standards Mapping - Web Application Security Consortium 24 + 2 Information Leakage

desc.structural.objc.privacy_violation_icloud_synchronized_credentials

Abstract

El método identificado inicializa una nueva NSURLCredential que puede sincronizarse y que se distribuirá a todos los dispositivos sincronizados y se almacenará en el entorno iCloud de Apple.

Explanation


    ...
    let credential = NSURLCredential(user:foo, password:password, persistence:.Synchronizable) 
    let shared = NSURLCredentialStorage.sharedCredentialStorage()
    shared.setCredential(credential, forProtectionSpace:protectionSpace)
    ...