Reino: Security Features

La seguridad de un software no es un software de seguridad. Nos preocupamos de cuestiones como la autenticación, el control de acceso, la confidencialidad, la criptografía y la gestión de privilegios.

Access Control: Form Authentication Bypass

C#/VB.NET/ASP.NET

Abstract

La aplicación establece una propiedad que permite la entrada no validada a las API nativas y puede llevar a que un atacante eluda la autenticación.

Explanation

De forma predeterminada, la autenticación de formularios ASP.NET valida las credenciales del usuario antes de pasarlas a las API nativas durante el proceso de autenticación. El problema es que esta funcionalidad se puede modificar con el parámetro aspnet:UseLegacyFormsAuthenticationTicketCompatibility para permitir que entradas no validadas se pasen a las API nativas y puede llevar a que un atacante pueda eludir la autenticación. Un atacante que aproveche con éxito esta vulnerabilidad podría eludir la autenticación de formularios ASP.NET para cualquier nombre de usuario conocido sin su contraseña. El atacante podría entonces realizar cualquier acción en el contexto del usuario víctima, incluida la ejecución de comandos arbitrarios en el sitio.

Ejemplo 1: en el siguiente ejemplo, aspnet:UseLegacyFormsAuthenticationTicketCompatibility está definido como true.


...
  <appSettings>
    <add key="aspnet:UseLegacyFormsAuthenticationTicketCompatibility" value="true" />
  </appSettings>
...

References

[1] ASP.NET appSettings Element Microsoft

[2] Microsoft Security Bulletin MS11-100 - Critical Microsoft

[3] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-000213, CCI-001084, CCI-002165

[4] Standards Mapping - FIPS200 AC

[5] Standards Mapping - General Data Protection Regulation (GDPR) Access Violation

[6] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-3 Access Enforcement (P1), IA-2 Identification and Authentication (Organizational Users) (P1), IA-11 Re-Authentication (P0), SC-3 Security Function Isolation (P1)

[7] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-3 Access Enforcement, IA-2 Identification and Authentication (Organizational Users), SC-3 Security Function Isolation, SC-11 Trusted Path

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

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

[10] Standards Mapping - OWASP Top 10 2004 A3 Broken Authentication and Session Management

[11] Standards Mapping - OWASP Top 10 2007 A7 Broken Authentication and Session Management

[12] Standards Mapping - OWASP Top 10 2010 A3 Broken Authentication and Session Management

[13] Standards Mapping - OWASP Top 10 2013 A2 Broken Authentication and Session Management

[14] Standards Mapping - OWASP Top 10 2017 A2 Broken Authentication

[15] Standards Mapping - OWASP Top 10 2021 A07 Identification and Authentication Failures

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

[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.5.7

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

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

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

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

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

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

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

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

[26] 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

[27] Standards Mapping - SANS Top 25 2011 Porous Defenses - CWE ID 863

[28] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3610 CAT I

[29] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3610 CAT I

[30] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3610 CAT I

[31] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3610 CAT I

[32] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[33] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[34] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[35] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[36] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[37] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[38] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[39] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[40] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[41] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[42] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[43] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[44] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[45] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001520 CAT II, APSC-DV-001530 CAT II, APSC-DV-001540 CAT I, APSC-DV-002360 CAT II

[46] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001520 CAT II, APSC-DV-001530 CAT II, APSC-DV-001540 CAT I, APSC-DV-002360 CAT II

[47] Standards Mapping - Web Application Security Consortium Version 2.00 Insufficient Authentication (WASC-01)

[48] Standards Mapping - Web Application Security Consortium 24 + 2 Insufficient Authentication

desc.configuration.dotnet.access_control_form_authentication_bypass