Reino: Security Features

Segurança de software não é o mesmo que software de segurança. Aqui, estamos interessados em tópicos como autenticação, controle de acesso, confidencialidade, criptografia e gestão de privilégios.

WCF Misconfiguration: Weak Class Reference

Abstract
O programa usa uma referência de classe fraca, o que pode permitir que um invasor execute código não autorizado.
Explanation
O programa faz referência a uma classe definida pelo usuário que não é identificada exclusivamente. Quando o .NET carrega essa classe identificada fracamente, o carregador de tipo CLR procura a classe nos seguintes locais na ordem especificada:

- Se o assembly do tipo for conhecido, o carregador procura os locais de redirecionamento do arquivo de configuração, GAC, o assembly atual usando informações de configuração e o diretório base do aplicativo.

- Se o assembly for desconhecido, o carregador pesquisará o assembly atual, mscorlib e o local retornado pelo manipulador de eventos TypeResolve.

Esta ordem de pesquisa CLR pode ser modificada com ganchos, como o mecanismo Type Forwarding e o evento AppDomain.TypeResolve.

Se um invasor explorar a ordem de pesquisa do CLR criando uma classe alternativa com o mesmo nome e colocando-a em um local alternativo que o CLR carregará primeiro, o CLR executará acidentalmente o código fornecido pelo invasor.

Exemplo 1: O elemento <behaviorExtensions/> do arquivo de configuração WCF a seguir instrui o WCF a adicionar uma classe de comportamento personalizado a uma determinada extensão WCF.


<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