Reino: API Abuse

Uma API é um contrato entre quem chama e o que se chama. As formas mais comuns de abuso de API ocorrem quando o responsável pela chamada não respeita sua parte do contrato. Por exemplo, se um programa não chama chdir() após chamar chroot(), ele viola o contrato que especifica como alterar o diretório raiz ativo de forma segura. Outro bom exemplo de abuso de biblioteca é esperar que o elemento chamado retorne informações confiáveis de DNS ao responsável pela chamada. Nesse caso, o responsável pela chamada abusa a API do elemento chamado ao fazer certas suposições sobre seu comportamento (isto é, que o valor de retorno pode ser usado para fins de autenticação). A outra parte também pode violar o contrato entre quem chama e o que se chama. Por exemplo, se um programador definir SecureRandom como subclasse e retornar um valor não aleatório, o contrato será violado.

ASP.NET Middleware Out of Order: Insecure Transport

C#/VB.NET/ASP.NET

Abstract

O aplicativo especifica o middleware de redirecionamento HTTPS ASP.NET padrão incorretamente.

Explanation

O middleware ASP.NET Core que não é adicionado ao pipeline de middleware na ordem correta não funcionará conforme o esperado, deixando um aplicativo aberto a vários problemas de segurança.

Exemplo 1: O método UseHttpsRedirection() adiciona o middleware de redirecionamento HTTPS ao pipeline de middleware, que permite o redirecionamento de solicitações HTTP não seguras para uma solicitação HTTPS segura. Quando especificado na ordem errada, conforme mostrado, nenhum redirecionamento HTTPS significativo ocorrerá antes de processar a solicitação por meio do middleware listado antes do redirecionamento. Isso permitirá que as solicitações HTTP sejam processadas pelo aplicativo antes de serem redirecionadas para a conexão HTTPS segura.


...
var builder = WebApplication.CreateBuilder(...);
var app = builder.Build(...);
app.UseStaticFiles();
app.UseRouting();
app.UseSession();
app.UseAuthentication();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
    ...
}

app.UseHttpsRedirection();
...

References

[1] Rick Anderson, Steve Smith ASP.NET Core Middleware Microsoft

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

[3] Standards Mapping - CIS Amazon Elastic Kubernetes Service Benchmark 2

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

[5] Standards Mapping - CIS Google Kubernetes Engine Benchmark normal

[6] Standards Mapping - Common Weakness Enumeration CWE ID 696, CWE ID 200, CWE ID 311, CWE ID 319

[7] Standards Mapping - Common Weakness Enumeration Top 25 2019 [4] CWE ID 200

[8] Standards Mapping - Common Weakness Enumeration Top 25 2020 [7] CWE ID 200

[9] Standards Mapping - Common Weakness Enumeration Top 25 2021 [20] CWE ID 200

[10] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-000068, CCI-001453, CCI-002418, CCI-002420, CCI-002421, CCI-002422, CCI-002890, CCI-003123

[11] Standards Mapping - FIPS200 SC

[12] Standards Mapping - General Data Protection Regulation (GDPR) Insufficient Data Protection

[13] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-8 Transmission Confidentiality and Integrity (P1)

[14] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-8 Transmission Confidentiality and Integrity

[15] Standards Mapping - OWASP Top 10 2007 A9 Insecure Communications

[16] Standards Mapping - OWASP Top 10 2010 A9 Insufficient Transport Layer Protection

[17] Standards Mapping - OWASP Top 10 2013 A5 Security Misconfiguration

[18] Standards Mapping - OWASP Top 10 2017 A6 Security Misconfiguration

[19] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration

[20] Standards Mapping - OWASP Application Security Verification Standard 4.0 8.3.4 Sensitive Private Data (L1 L2 L3)

[21] Standards Mapping - OWASP Mobile 2014 M3 Insufficient Transport Layer Protection

[22] Standards Mapping - OWASP Mobile 2024 M5 Insecure Communication

[23] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.10

[24] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 4.1, Requirement 6.3.1.4, Requirement 6.5.9

[25] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.4

[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.4

[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.4

[28] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.4

[29] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.4

[30] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 4.2.1, Requirement 6.2.4

[31] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 3.3 - Sensitive Data Retention, Control Objective 6.2 - Sensitive Data Protection, Control Objective 7 - Use of Cryptography

[32] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 3.3 - Sensitive Data Retention, Control Objective 6.2 - Sensitive Data Protection, Control Objective 7 - Use of Cryptography, Control Objective B.2.5 - Terminal Software Design

[33] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 3.3 - Sensitive Data Retention, Control Objective 6.2 - Sensitive Data Protection, Control Objective 7 - Use of Cryptography, Control Objective B.2.5 - Terminal Software Design, Control Objective C.4.1 - Web Software Communications

[34] Standards Mapping - SANS Top 25 2009 Insecure Interaction - CWE ID 319

[35] Standards Mapping - SANS Top 25 2011 Porous Defenses - CWE ID 311

[36] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3250.1 CAT I, APP3260.1 CAT II

[37] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3250.1 CAT I, APP3260 CAT II

[38] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3250.1 CAT I, APP3260 CAT II

[39] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3250.1 CAT I, APP3260 CAT II

[40] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3250.1 CAT I, APP3260 CAT II

[41] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3250.1 CAT I, APP3260 CAT II

[42] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3250.1 CAT I, APP3260 CAT II

[43] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-000160 CAT II, APSC-DV-000170 CAT II, APSC-DV-001940 CAT II, APSC-DV-001950 CAT II, APSC-DV-002150 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II

[44] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-000160 CAT II, APSC-DV-000170 CAT II, APSC-DV-001940 CAT II, APSC-DV-001950 CAT II, APSC-DV-002150 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II

[45] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-000160 CAT II, APSC-DV-000170 CAT II, APSC-DV-001940 CAT II, APSC-DV-001950 CAT II, APSC-DV-002150 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II

[46] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-000160 CAT II, APSC-DV-000170 CAT II, APSC-DV-001940 CAT II, APSC-DV-001950 CAT II, APSC-DV-002150 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II

[47] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-000160 CAT II, APSC-DV-000170 CAT II, APSC-DV-001940 CAT II, APSC-DV-001950 CAT II, APSC-DV-002150 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II

[48] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-000160 CAT II, APSC-DV-000170 CAT II, APSC-DV-001940 CAT II, APSC-DV-001950 CAT II, APSC-DV-002150 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II

[49] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-000160 CAT II, APSC-DV-000170 CAT II, APSC-DV-001940 CAT II, APSC-DV-001950 CAT II, APSC-DV-002150 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II

[50] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-000160 CAT II, APSC-DV-000170 CAT II, APSC-DV-001940 CAT II, APSC-DV-001950 CAT II, APSC-DV-002150 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II

[51] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-000160 CAT II, APSC-DV-000170 CAT II, APSC-DV-001940 CAT II, APSC-DV-001950 CAT II, APSC-DV-002150 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II

[52] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-000160 CAT II, APSC-DV-000170 CAT II, APSC-DV-001940 CAT II, APSC-DV-001950 CAT II, APSC-DV-002150 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II

[53] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-000160 CAT II, APSC-DV-000170 CAT II, APSC-DV-001940 CAT II, APSC-DV-001950 CAT II, APSC-DV-002150 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II

[54] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-000160 CAT II, APSC-DV-000170 CAT II, APSC-DV-001940 CAT II, APSC-DV-001950 CAT II, APSC-DV-002150 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II

[55] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-000160 CAT II, APSC-DV-000170 CAT II, APSC-DV-001940 CAT II, APSC-DV-001950 CAT II, APSC-DV-002150 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II

[56] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000160 CAT II, APSC-DV-000170 CAT II, APSC-DV-001940 CAT II, APSC-DV-001950 CAT II, APSC-DV-002150 CAT II, APSC-DV-002440 CAT I, APSC-DV-002450 CAT II, APSC-DV-002460 CAT II, APSC-DV-002470 CAT II

[57] Standards Mapping - Web Application Security Consortium Version 2.00 Insufficient Transport Layer Protection (WASC-04)

desc.controlflow.dotnet.asp_dotnet_middleware_out_of_order_insecure_transport