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。
Struts 2: Unvalidated Action
Abstract
Struts2 Actions 會使用 Struts Validation 框架以防止由未經檢驗的輸入所造成的弱點。
Explanation
在 J2EE 應用程式中，未經檢查的輸入是弱點產生的主因。未經檢查的輸入資料會導致許多弱點的產生，包括 Cross-Site Scripting、Process Control 和 SQL injection。雖然 J2EE 應用程式在通常情況下不容易因記憶體損壞攻擊而受到影響，但是如果 J2EE 應用程式連接到未執行陣列界限檢查的本地程式碼，攻擊者就能夠在 J2EE 應用程式中利用輸入驗證錯誤發起 Buffer overflow 攻擊。
為了避免此類攻擊，應在應用程式處理輸入資料之前使用 Struts Validation 框架來檢查所有程式的輸入資料。使用 Fortify Static Code Analyzer 來確保 Struts Validator 的配置不存在任何弱點。
驗證器的範例用法包括進行檢查並確保：
- 在電話號碼欄位中只包含電話號碼的有效字元
- Boolean 值只有「T」或者「F」
- 未限定格式的字串必須有合理的長度，並且由有效的字元組成
為了避免此類攻擊，應在應用程式處理輸入資料之前使用 Struts Validation 框架來檢查所有程式的輸入資料。使用 Fortify Static Code Analyzer 來確保 Struts Validator 的配置不存在任何弱點。
驗證器的範例用法包括進行檢查並確保：
- 在電話號碼欄位中只包含電話號碼的有效字元
- Boolean 值只有「T」或者「F」
- 未限定格式的字串必須有合理的長度，並且由有效的字元組成
References
[1] T. Husted et al. Struts in Action: Building Web Applications with the Leading Java Framework Manning Publications
[2] The Struts Project The Apache Foundation
[3] Standards Mapping - Common Weakness Enumeration CWE ID 101
[4] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002754
[5] Standards Mapping - FIPS200 SI
[6] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[7] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[8] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[9] Standards Mapping - OWASP API 2023 API8 Security Misconfiguration
[10] Standards Mapping - OWASP Mobile 2014 M1 Weak Server Side Controls
[11] Standards Mapping - OWASP Top 10 2004 A1 Unvalidated Input
[12] Standards Mapping - OWASP Top 10 2010 A6 Security Misconfiguration
[13] Standards Mapping - OWASP Top 10 2013 A5 Security Misconfiguration
[14] Standards Mapping - OWASP Top 10 2017 A6 Security Misconfiguration
[15] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[16] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.1
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[24] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[25] 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
[26] 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
[27] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[28] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I
[29] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I
[30] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I
[31] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I
[32] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I
[33] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002560 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002560 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002560 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002560 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002560 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002560 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[49] Standards Mapping - Web Application Security Consortium Version 2.00 Application Misconfiguration (WASC-15)
desc.structural.java.struts2_unvalidated_action