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Access Control: Case-Insensitive Package Name Comparison

Java/JSP

Abstract

應用程式會以不區分大小寫的方式比較 Android 套件與使用者控制的值，這可讓攻擊者根據套件名稱略過存取控制。

Explanation

在 Android 上，套件名稱區分大小寫，因此應以區分大小寫的方式進行比較。惡意應用程式可能會共用字母大小寫不同的類似套件，讓攻擊者能夠略過存取控制。

範例 1： 下列程式碼執行不安全的字串比較以進行存取控制：


public boolean isTrusted(String paramString) {
 if (this._applicationContext.getPackageName().equalsIgnoreCase(paramString)) {
 return true;
}

References

[1] Standards Mapping - Common Weakness Enumeration CWE ID 285

[2] Standards Mapping - Common Weakness Enumeration Top 25 2023 [24] CWE ID 863

[3] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-000213, CCI-001084, CCI-002165

[4] Standards Mapping - FIPS200 AC

[5] Standards Mapping - General Data Protection Regulation (GDPR) Access Violation

[6] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-3 Access Enforcement (P1), SC-3 Security Function Isolation (P1)

[7] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-3 Access Enforcement, SC-3 Security Function Isolation

[8] Standards Mapping - OWASP Application Security Verification Standard 4.0 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), 13.1.4 Generic Web Service Security Verification Requirements (L2 L3)

[9] Standards Mapping - OWASP Mobile 2014 M5 Poor Authorization and Authentication

[10] Standards Mapping - OWASP Mobile 2024 M3 Insecure Authentication/Authorization

[11] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-AUTH-1

[12] Standards Mapping - OWASP Top 10 2004 A2 Broken Access Control

[13] Standards Mapping - OWASP Top 10 2007 A10 Failure to Restrict URL Access

[14] Standards Mapping - OWASP Top 10 2010 A8 Failure to Restrict URL Access

[15] Standards Mapping - OWASP Top 10 2013 A7 Missing Function Level Access Control

[16] Standards Mapping - OWASP Top 10 2017 A5 Broken Access Control

[17] Standards Mapping - OWASP Top 10 2021 A01 Broken Access Control

[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.2, Requirement 7.2

[19] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.5, Requirement 6.5.10, Requirement 7.2

[20] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.8, Requirement 7.2

[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.8, Requirement 7.2

[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.8, Requirement 7.2

[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.8, Requirement 7.2

[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.8, Requirement 7.2

[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4, Requirement 7.3.1

[26] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 5.4 - Authentication and Access Control

[27] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 5.4 - Authentication and Access Control

[28] 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

[29] Standards Mapping - SANS Top 25 2009 Porous Defenses - CWE ID 285

[30] Standards Mapping - SANS Top 25 2010 Porous Defenses - CWE ID 285

[31] Standards Mapping - SANS Top 25 2011 Porous Defenses - CWE ID 863

[32] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3470.1 CAT II, APP3470.4 CAT II

[33] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3470.1 CAT II, APP3470.4 CAT II

[34] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3470.1 CAT II, APP3470.4 CAT II

[35] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3470.1 CAT II, APP3470.4 CAT II

[36] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3470.1 CAT II, APP3470.4 CAT II

[37] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3470.1 CAT II, APP3470.4 CAT II

[38] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3470.1 CAT II, APP3470.4 CAT II

[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 Authentication (WASC-01)

[55] Standards Mapping - Web Application Security Consortium 24 + 2 Insufficient Authentication

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