界: Security Features

软件安全不是安全软件。此处我们关注的主题包括身份验证、Access Control、机密性、加密和权限管理。

WCF Misconfiguration: Weak Class Reference

C#/VB.NET/ASP.NET

Abstract

程序使用弱类引用，这可能会允许攻击者执行未经授权的代码。

Explanation

程序引用了未唯一标识的用户定义类。当 .NET 加载该弱标识的类时，CLR 类型加载程序会按指定顺序在以下位置搜索该类：

- 如果已经知道类型的程序集，加载程序将搜索配置文件的重定向位置、GAC、使用配置信息的当前程序集以及应用程序基目录。

- 如果程序集未知，加载程序将搜索当前程序集、mscorlib 以及 TypeResolve 事件处理程序返回的位置。

通过使用类型转发机制和 AppDomain.TypeResolve 事件之类的挂钩，可以修改此 CLR 搜索顺序。

如果攻击者通过创建具有相同名称的替代类并将其放置在 CLR 将首先加载的替代位置，以此来利用 CLR 搜索顺序，CLR 将无意中执行攻击者提供的代码。

示例 1：以下 WCF 配置文件中的 <behaviorExtensions/> 元素会指示 WCF 向特定的 WCF 扩展添加自定义行为类。


<system.serviceModel>
    <extensions>
        <behaviorExtensions>
            <add name="myBehavior" type="MyBehavior" />
       </behaviorExtensions>
    </extensions>
</system.serviceModel>

References

[1] Microsoft Developer Network (MSDN)

[2] Standards Mapping - Common Weakness Enumeration CWE ID 95

[3] Standards Mapping - Common Weakness Enumeration Top 25 2019 [18] CWE ID 094

[4] Standards Mapping - Common Weakness Enumeration Top 25 2020 [17] CWE ID 094

[5] Standards Mapping - Common Weakness Enumeration Top 25 2022 [25] CWE ID 094

[6] Standards Mapping - Common Weakness Enumeration Top 25 2023 [23] CWE ID 094

[7] Standards Mapping - Common Weakness Enumeration Top 25 2024 [11] CWE ID 094

[8] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002754

[9] Standards Mapping - FIPS200 SI

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

[11] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)

[12] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation

[13] Standards Mapping - OWASP API 2023 API8 Security Misconfiguration

[14] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.2.4 Sanitization and Sandboxing Requirements (L1 L2 L3), 5.2.5 Sanitization and Sandboxing Requirements (L1 L2 L3), 5.2.8 Sanitization and Sandboxing Requirements (L1 L2 L3), 5.3.6 Output Encoding and Injection Prevention Requirements (L1 L2 L3)

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

[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 Data Security Standard Version 4.0.1 Requirement 6.2.4

[31] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection

[32] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection

[33] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection

[34] Standards Mapping - SANS Top 25 2009 Insecure Interaction - CWE ID 116

[35] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I, APP3570 CAT I

[36] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3570 CAT I

[37] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3570 CAT I

[38] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3570 CAT I

[39] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3570 CAT I

[40] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3570 CAT I

[41] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3570 CAT I

[42] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002560 CAT I

[43] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002560 CAT I

[44] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002560 CAT I

[45] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002560 CAT I

[46] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002560 CAT I

[47] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002560 CAT I

[48] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002560 CAT I

[49] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002560 CAT I

[50] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002560 CAT I

[51] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002560 CAT I

[52] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002560 CAT I

[53] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002560 CAT I

[54] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002560 CAT I

[55] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002560 CAT I

[56] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002560 CAT I

desc.config.dotnet.wcf_misconfiguration_weak_class_reference