界: API Abuse

API 是调用方和被调用方之间的约定。最常见的 API 滥用是由于调用方未能遵守此约定的终止导致的。例如，如果某个程序在调用 chroot() 后未能调用 chdir()，则违反了用于指定如何安全地更改活动根目录的约定。库滥用的另一个典型示例是期望被调用方向调用方返回可信的 DNS 信息。在这种情况下，调用方通过对被调用方行为做出某种假设（返回值可用于身份验证目的）滥用其 API。另一方也可能违反调用方-被调用方约定。例如，如果编码器子类化 SecureRandom 并返回一个非随机值，则将违反此约定。

Struts 2 Bad Practices: Dynamic Method Invocation

Java/JSP

Abstract

Struts 2 Action 暴露了可由最终用户调用的公共方法，从而覆盖 Action 的 execute() 方法。

Explanation

Struts 2 引入了一种称为“动态方法调用”的功能，该功能允许 Action 暴露方法而非 execute()。!（感叹号）字符或 method: 前缀可用于 Action URL，在启用“动态方法调用”的情况下，可调用 Action 中的任何公共方法。没有意识到此功能的开发者可能会无意中将内部业务逻辑暴露给攻击者。

例如，如果 Action 包含一种称为 getUserPassword() 的公共方法，该方法没有采用参数且未禁用“动态方法调用”功能，则攻击者可以利用这点访问以下 URL： http://server/app/recoverpassword!getPassword.action

References

[1] Struts 2 Security Vulnerability - Dynamic Method Invocation

[2] Struts 2 - Dynamic Method Invocation

[3] Standards Mapping - CIS Azure Kubernetes Service Benchmark 2

[4] Standards Mapping - CIS Microsoft Azure Foundations Benchmark complete

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

[6] Standards Mapping - CIS Amazon Web Services Foundations Benchmark 1

[7] Standards Mapping - CIS Google Kubernetes Engine Benchmark integrity

[8] Standards Mapping - CIS Kubernetes Benchmark partial

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

[10] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-000213, CCI-001764, CCI-001774, CCI-002165

[11] Standards Mapping - FIPS200 AC

[12] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data

[13] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-3 Access Enforcement (P1)

[14] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-3 Access Enforcement

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

[16] Standards Mapping - OWASP Top 10 2007 A4 Insecure Direct Object Reference

[17] Standards Mapping - OWASP Top 10 2010 A4 Insecure Direct Object References

[18] Standards Mapping - OWASP Top 10 2013 A4 Insecure Direct Object References

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

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

[21] Standards Mapping - OWASP API 2023 API5 Broken Function Level Authorization

[22] 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)

[23] Standards Mapping - OWASP Mobile 2014 M1 Weak Server Side Controls

[24] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.2

[25] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.5.4

[26] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.8

[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.8

[28] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.8

[29] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.8

[30] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.8

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

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

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

[34] 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

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

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

[37] Standards Mapping - SANS Top 25 2011 Porous Defenses - CWE ID 862

[38] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I

[39] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I

[40] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I

[41] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I

[42] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I

[43] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I

[44] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I

[45] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001480 CAT II, APSC-DV-001490 CAT II

[46] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001480 CAT II, APSC-DV-001490 CAT II

[47] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001480 CAT II, APSC-DV-001490 CAT II

[48] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001480 CAT II, APSC-DV-001490 CAT II

[49] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001480 CAT II, APSC-DV-001490 CAT II

[50] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001480 CAT II, APSC-DV-001490 CAT II

[51] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001480 CAT II, APSC-DV-001490 CAT II

[52] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001480 CAT II, APSC-DV-001490 CAT II

[53] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001480 CAT II, APSC-DV-001490 CAT II

[54] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001480 CAT II, APSC-DV-001490 CAT II

[55] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001480 CAT II, APSC-DV-001490 CAT II

[56] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001480 CAT II, APSC-DV-001490 CAT II

[57] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001480 CAT II, APSC-DV-001490 CAT II

[58] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001480 CAT II, APSC-DV-001490 CAT II

[59] Standards Mapping - Web Application Security Consortium Version 2.00 Insufficient Authorization (WASC-02)

[60] Standards Mapping - Web Application Security Consortium 24 + 2 Insufficient Authorization

desc.structural.java.struts2_bad_practices_dynamic_method_invocation