Kingdom: Encapsulation

Encapsulation is about drawing strong boundaries. In a web browser that might mean ensuring that your mobile code cannot be abused by other mobile code. On the server it might mean differentiation between validated data and unvalidated data, between one user's data and another's, or between data users are allowed to see and data that they are not.

Insecure Storage: Insufficient Cache Leak Protection

Objective-C
Swift

Abstract

The application tries to disable the HTTP(S) cache by setting the disk or memory cache capacity to 0. However, there is no guarantee this setting will be enforced.

Explanation

The HTTP(S) responses may contain sensitive data such as session cookies and API tokens. The URL loading system will cache all the HTTP(S) responses for performance reasons, storing them unencrypted in the {app ID}/Library/Caches/com.mycompany.myapp/Cache.db* files.
Developers may think that by setting the diskCapacity or memoryCapacity properties of the URLCache class to 0, they may be effectively disabling the HTTP(S) response cache system. However, the NSURLCache documentation states that both the on-disk and in-memory caches will be truncated to the configured sizes only if the device runs low on memory or disk space. Both settings are meant to be used by the system to free system resources and improve performance, not as a security control.

References

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

[2] URLCache Apple

[3] Standards Mapping - Common Weakness Enumeration CWE ID 311, CWE ID 312, CWE ID 313, CWE ID 522

[4] Standards Mapping - Common Weakness Enumeration Top 25 2019 [13] CWE ID 287

[5] Standards Mapping - Common Weakness Enumeration Top 25 2020 [14] CWE ID 287, [18] CWE ID 522

[6] Standards Mapping - Common Weakness Enumeration Top 25 2021 [14] CWE ID 287, [21] CWE ID 522

[7] Standards Mapping - Common Weakness Enumeration Top 25 2022 [14] CWE ID 287

[8] Standards Mapping - Common Weakness Enumeration Top 25 2023 [13] CWE ID 287

[9] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001350, 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 AU-9 Protection of Audit Information (P1), SC-28 Protection of Information at Rest (P1)

[13] Standards Mapping - NIST Special Publication 800-53 Revision 5 AU-9 Protection of Audit Information, 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), 2.7.1 Out of Band Verifier Requirements (L1 L2 L3), 2.7.2 Out of Band Verifier Requirements (L1 L2 L3), 2.7.3 Out of Band Verifier Requirements (L1 L2 L3), 2.8.4 Single or Multi Factor One Time Verifier Requirements (L2 L3), 2.8.5 Single or Multi Factor One Time Verifier Requirements (L2 L3), 2.10.2 Service Authentication Requirements (L2 L3), 2.10.3 Service Authentication Requirements (L2 L3), 3.7.1 Defenses Against Session Management Exploits (L1 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), 9.2.3 Server Communications Security Requirements (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 2004 A8 Insecure Storage

[19] Standards Mapping - OWASP Top 10 2007 A8 Insecure Cryptographic Storage

[20] Standards Mapping - OWASP Top 10 2010 A7 Insecure Cryptographic Storage

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

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

[23] Standards Mapping - OWASP Top 10 2021 A04 Insecure Design

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

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

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

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

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

[29] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 7.1 - Use of Cryptography

[30] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 7.1 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design

[31] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 7.1 - Use of Cryptography, Control Objective B.2.3 - Terminal Software Design

[32] Standards Mapping - SANS Top 25 2010 Porous Defenses - CWE ID 311

[33] Standards Mapping - SANS Top 25 2011 Porous Defenses - CWE ID 311

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

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

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

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

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

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

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

[41] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-001350 CAT II, APSC-DV-002340 CAT II

[42] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-001350 CAT II, APSC-DV-002340 CAT II

[43] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-001350 CAT II, APSC-DV-002340 CAT II

[44] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-001350 CAT II, APSC-DV-002340 CAT II

[45] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-001350 CAT II, APSC-DV-002340 CAT II

[46] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-001350 CAT II, APSC-DV-002340 CAT II

[47] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-001350 CAT II, APSC-DV-002340 CAT II

[48] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-001350 CAT II, APSC-DV-002340 CAT II

[49] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-001350 CAT II, APSC-DV-002340 CAT II

[50] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-001350 CAT II, APSC-DV-002340 CAT II

[51] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-001350 CAT II, APSC-DV-002340 CAT II

[52] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-001350 CAT II, APSC-DV-002340 CAT II

[53] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-001350 CAT II, APSC-DV-002340 CAT II

[54] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-001350 CAT II, APSC-DV-002340 CAT II

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

desc.semantic.objc.insecure_storage_insufficient_cache_leak_protection