Reino: Input Validation and Representation

Los problemas de validación y representación de entradas están causados por metacaracteres, codificaciones alternativas y representaciones numéricas. Los problemas de seguridad surgen de entradas en las que se confía. Estos problemas incluyen: «desbordamientos de búfer», ataques de «scripts de sitios», "SQL injection" y muchas otras acciones.

Setting Manipulation: User-Controlled Expression Delimiters

JavaScript/TypeScript

Abstract

La aplicación permite a los usuarios definir delimitadores de expresión, hecho que les puede otorgar la habilidad de evitar las protecciones de scripts entre sitios.

Explanation

Cuando permite a los usuarios definir los delimitadores utilizados por los motores de plantillas, significa que las protecciones que se implementaron anteriormente ya no funcionan o puede que no sean válidas. En el mejor de los casos, esto puede hacer que la funcionalidad no funcione según lo esperado o que falte información, pero también puede permitir a los usuarios malintencionados evitar las protecciones en el motor y acabar en vulnerabilidades de scripts entre sitios.

Ejemplo 1: En el siguiente código, se configura un módulo AngularJS para utilizar un símbolo de inicio definido desde el hash de la dirección URL.



var hash = window.location.hash;
var myStartSymbol = decodeURIComponent(hash.substring(1, hash.length));

myModule.config(function($interpolateProvider){
    $interpolateProvider.startSymbol(myStartSymbol);
});

Esto suele hacerse para permitir que varios motores de plantilla trabajen conjuntamente, lo que en sí mismo es extremadamente peligroso [1], pero esto puede conducir a que se ejecuten motores que pueden no ser compatibles con las expresiones AngularJS, lo que puede llevar a que los usuarios puedan pasar por alto la validación regular y ejecuten su propio código dentro del explorador.

References

[1] AngularJS $interpolateProvider documentation Google

[2] Standards Mapping - Common Weakness Enumeration CWE ID 15

[3] Standards Mapping - Common Weakness Enumeration Top 25 2024 [12] CWE ID 020

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

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

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

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

[8] Standards Mapping - OWASP Mobile 2014 M8 Security Decisions Via Untrusted Inputs

[9] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation

[10] Standards Mapping - OWASP Top 10 2004 A1 Unvalidated Input

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

[12] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.1

[13] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1

[14] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1

[15] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1

[16] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1

[17] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1

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

[19] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4

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

[21] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation

[22] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[43] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I

[44] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I

[45] Standards Mapping - Web Application Security Consortium Version 2.00 Improper Input Handling (WASC-20)

desc.dataflow.javascript.setting_manipulation_user_controlled_expression_delimiters