界: Input Validation and Representation
輸入驗證和表示法問題是由中繼字元、替代編碼和數值表示法引起的。信任輸入會導致安全問題。問題包括：「Buffer Overflows」、「Cross-Site Scripting」攻擊、「SQL Injection」及其他許多問題。
Content Provider URI Injection
Abstract
建構其中包含使用者輸入資料的內容提供者查詢指令，會讓攻擊者可以存取未經授權的記錄。
Explanation
Query string injection 弱點會在以下情況中出現：
1. 資料從一個不可信賴的來源進入程式。
2. 此資料將用來動態建構內容提供者查詢 URI。
Android 內容提供者可讓開發人員透過只建構內容提供者 URI 寫入查詢，無需 SQL。內容提供者查詢 URI 容易受到插入式攻擊，因此開發人員應在未確保中繼字元已正確驗證或編碼的情況下，避免使用包含受感染的資料輸入的字串串連來建構 URI。
範例 1：指定應用程式在 URI 上暴露幾個內容提供者：
如果開發人員透過串連字串建立查詢 URI，攻擊者將可在路徑中包含斜線，或包含會變更查詢含意的其他 URI 中繼字元。在以下程式碼片段中，攻擊者將能夠透過提供包含值
1. 資料從一個不可信賴的來源進入程式。
2. 此資料將用來動態建構內容提供者查詢 URI。
Android 內容提供者可讓開發人員透過只建構內容提供者 URI 寫入查詢，無需 SQL。內容提供者查詢 URI 容易受到插入式攻擊，因此開發人員應在未確保中繼字元已正確驗證或編碼的情況下，避免使用包含受感染的資料輸入的字串串連來建構 URI。
範例 1：指定應用程式在 URI 上暴露幾個內容提供者：
content://my.authority/messagescontent://my.authority/messages/123content://my.authority/messages/deleted如果開發人員透過串連字串建立查詢 URI，攻擊者將可在路徑中包含斜線，或包含會變更查詢含意的其他 URI 中繼字元。在以下程式碼片段中，攻擊者將能夠透過提供包含值
deleted 的 msgId 程式碼來呼叫 content://my.authority/messages/deleted：
// "msgId" is submitted by users
Uri dataUri = Uri.parse(WeatherContentProvider.CONTENT_URI + "/" + msgId);
Cursor wCursor1 = getContentResolver().query(dataUri, null, null, null, null);
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 89
[2] Standards Mapping - Common Weakness Enumeration Top 25 2019 [6] CWE ID 089
[3] Standards Mapping - Common Weakness Enumeration Top 25 2020 [6] CWE ID 089
[4] Standards Mapping - Common Weakness Enumeration Top 25 2021 [6] CWE ID 089
[5] Standards Mapping - Common Weakness Enumeration Top 25 2022 [3] CWE ID 089
[6] Standards Mapping - Common Weakness Enumeration Top 25 2023 [3] CWE ID 089
[7] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002754
[8] Standards Mapping - FIPS200 SI
[9] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[10] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[11] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[12] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.4 Output Encoding and Injection Prevention Requirements (L1 L2 L3), 5.3.5 Output Encoding and Injection Prevention Requirements (L1 L2 L3)
[13] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection
[14] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[15] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[16] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[17] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[18] Standards Mapping - OWASP Top 10 2010 A1 Injection
[19] Standards Mapping - OWASP Top 10 2013 A1 Injection
[20] Standards Mapping - OWASP Top 10 2017 A1 Injection
[21] Standards Mapping - OWASP Top 10 2021 A03 Injection
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[31] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[32] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[33] Standards Mapping - SANS Top 25 2009 Insecure Interaction - CWE ID 089
[34] Standards Mapping - SANS Top 25 2010 Insecure Interaction - CWE ID 089
[35] Standards Mapping - SANS Top 25 2011 Insecure Interaction - CWE ID 089
[36] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I, APP3540.1 CAT I, APP3540.3 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3540.1 CAT I, APP3540.3 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3540.1 CAT I, APP3540.3 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3540.1 CAT I, APP3540.3 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3540.1 CAT I, APP3540.3 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3540.1 CAT I, APP3540.3 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3540.1 CAT I, APP3540.3 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002560 CAT I
[56] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[57] Standards Mapping - Web Application Security Consortium Version 2.00 SQL Injection (WASC-19)
[58] Standards Mapping - Web Application Security Consortium 24 + 2 SQL Injection
desc.dataflow.java.content_provider_uri_injection