界: Encapsulation

カプセル化とは、強い境界線を引くことです。Web ブラウザの場合は、自分のモバイルコードが他のモバイルコードに悪用されないようにすることを意味します。サーバー上では、検証されたデータと検証されていないデータ、あるユーザーのデータと別のユーザーのデータ、またはユーザーが見ることを許可されたデータと許可されていないデータの区別などを意味する場合があります。

Insecure Storage: Insufficient Cache Leak Protection

Objective-C
Swift

Abstract

アプリケーションはディスクまたはメモリキャッシュの容量を 0 に設定して HTTP(S) キャッシュを無効化しようとしますが、この設定が適用される保証はありません。

Explanation

HTTP(S) レスポンスには、セッション cookie や API トークンなどの機密データが含まれることがあります。URL ローディングシステムはパフォーマンス上の理由ですべての HTTP(S) レスポンスをキャッシュし、{app ID}/Library/Caches/com.mycompany.myapp/Cache.db* ファイルに暗号化せずに格納します。
開発者は、URLCache クラスの diskCapacity または memoryCapacity プロパティを 0 に設定することで、HTTP(S) レスポンスキャッシュシステムを効果的に無効化できると考えるかもしれません。しかし、NSURLCache ドキュメントには、デバイスのメモリまたはディスク領域が残り少なくなった場合のみ、ディスク上のキャッシュとメモリ内のキャッシュの両方が設定されたサイズまで切り詰められると記載されています。両方の設定は、セキュリティ制御としてではなく、システムリソースを解放してパフォーマンスを向上させるために使用されます。

References

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

[2] URLCache Apple

[3] Standards Mapping - CIS Azure Kubernetes Service Benchmark 1.0

[4] Standards Mapping - CIS Amazon Elastic Kubernetes Service Benchmark 4.0

[5] Standards Mapping - CIS Amazon Web Services Foundations Benchmark 3

[6] Standards Mapping - CIS Google Kubernetes Engine Benchmark normal

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

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

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

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

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

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

[13] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001350, CCI-002475

[14] Standards Mapping - FIPS200 MP

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

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

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

[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 - 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)

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

[26] Standards Mapping - OWASP Mobile 2023 M9 Insecure Data Storage

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

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

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

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

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

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

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

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

[35] 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

[36] 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

desc.semantic.objc.insecure_storage_insufficient_cache_leak_protection