Reino: Encapsulation

La encapsulación consiste en crear límites fuertes. En un explorador web esto puede suponer la seguridad de que tu codificación móvil no se vea comprometido por otro código móvil. En el servidor puede significar la diferenciación entre los datos validados y los que no lo están, entre los datos de un usuario y los de otro, o entre los diferentes usuarios, los datos que pueden ver y los que no.

Insecure Storage: Android External Storage

Java/JSP

Abstract

El programa escribe datos en el almacenamiento externo del dispositivo Android.

Explanation

Los datos guardados en el almacenamiento externo permiten un acceso de lectura general y solo los puede modificar el usuario cuando se habilite el almacenamiento masivo USB para transferir archivos en un equipo. Además, los archivos de la tarjeta de almacenamiento masivo permanecerán en esa ubicación, aunque se desinstale la aplicación que escribió estos. Estas limitaciones pueden poner en peligro la información confidencial escrita en el almacenamiento y permitir a los usuarios malintencionados introducir datos en el programa modificando un archivo externo que utilice.

Ejemplo 1: en el código siguiente, Environment.getExternalStorageDirectory() devuelve una referencia al almacenamiento externo del dispositivo Android.

 private void WriteToFile(String what_to_write) {
        try{
            File root = Environment.getExternalStorageDirectory();
            if(root.canWrite()) {
                File dir = new File(root + "write_to_the_SDcard");
                File datafile = new File(dir, number + ".extension");
                FileWriter datawriter = new FileWriter(datafile);
                BufferedWriter out = new BufferedWriter(datawriter);
                out.write(what_to_write);
                out.close();
             }
        }
   }

References

[1] Data Storage

[2] Paul McNamara Latest 'lost' laptop holds treasure-trove of unencrypted ATT payroll data Network World

[3] Standards Mapping - Common Weakness Enumeration CWE ID 276, CWE ID 313, CWE ID 359, CWE ID 921

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

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

[6] Standards Mapping - Common Weakness Enumeration Top 25 2021 [19] CWE ID 276, [20] CWE ID 200

[7] Standards Mapping - Common Weakness Enumeration Top 25 2022 [20] CWE ID 276

[8] Standards Mapping - Common Weakness Enumeration Top 25 2023 [25] CWE ID 276

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

[10] Standards Mapping - FIPS200 MP

[11] Standards Mapping - General Data Protection Regulation (GDPR) Insufficient Data Protection

[12] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-28 Protection of Information at Rest (P1)

[13] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-28 Protection of Information at Rest

[14] Standards Mapping - OWASP Application Security Verification Standard 4.0 2.6.3 Look-up Secret Verifier Requirements (L2 L3), 6.1.1 Data Classification (L2 L3), 6.1.2 Data Classification (L2 L3), 6.1.3 Data Classification (L2 L3), 6.2.1 Algorithms (L1 L2 L3), 8.1.6 General Data Protection (L3), 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)

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

[16] Standards Mapping - OWASP Mobile 2024 M9 Insecure Data Storage

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

[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 A04 Insecure Design

[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.3

[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.3

[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.3

[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.3

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

[26] 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

[27] 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

[28] 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

desc.semantic.java.insecure_storage_android_external_storage