Reino: Input Validation and Representation

Problemas de validação e representação da entrada são causados por metacaracteres, codificações alternativas e representações numéricas. Confiar na entrada resulta em problemas de segurança. Os problemas incluem: “Buffer Overflows”, ataques de “Cross-Site Scripting”, “SQL Injection”, entre outros.

HTML5: Form Validation Turned Off

Abstract
A validação HTML5 de campos de formulário de entrada está desabilitada.
Explanation
O HTML5 fornece uma nova habilidade de realizar uma validação simples de campos de formulário de entrada. É possível especificar se um campo de formulário de entrada é necessário com o uso do atributo required. Especificar o tipo de campo garante que a entrada seja verificada com relação ao seu tipo. É possível até mesmo fornecer um atributo pattern personalizável que verifica a entrada em relação a uma expressão regular. No entanto, essa validação é desabilitada com a adição de um atributo novalidate a uma tag de formulário e de um atributo formnovalidate a uma tag de entrada de envio.

Exemplo 1: O exemplo a seguir desabilita a validação de formulário por meio de um atributo novalidate.


<form action="demo_form.asp" novalidate="novalidate">
E-mail: <input type="email" name="user_email" />
<input type="submit" />
</form>
Exemplo 2: O exemplo a seguir desabilita a validação de formulário por meio de um atributo formnovalidate.


<form action="demo_form.asp" >
E-mail: <input type="email" name="user_email" />
<input type="submit" formnovalidate="formnovalidate"/>
</form>


Formulários HTML com validação desabilitada não são de fácil utilização e podem expor o servidor a vários tipos de ataques. Entradas não verificadas resultam são a causa raiz de vulnerabilidades, como criação de scripts entre sites, controle de processos e SQL Injection.
References
[1] HTML5 form novalidate Attribute W3Schools
[2] HTML5 input formnovalidate Attribute W3Schools
[3] Standards Mapping - Common Weakness Enumeration CWE ID 1173
[4] Standards Mapping - Common Weakness Enumeration Top 25 2019 [3] CWE ID 020
[5] Standards Mapping - Common Weakness Enumeration Top 25 2020 [3] CWE ID 020
[6] Standards Mapping - Common Weakness Enumeration Top 25 2021 [4] CWE ID 020
[7] Standards Mapping - Common Weakness Enumeration Top 25 2022 [4] CWE ID 020
[8] Standards Mapping - Common Weakness Enumeration Top 25 2023 [6] CWE ID 020
[9] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002754
[10] Standards Mapping - FIPS200 SI
[11] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[12] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[13] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[14] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.1.3 Input Validation Requirements (L1 L2 L3), 5.1.4 Input Validation Requirements (L1 L2 L3)
[15] Standards Mapping - OWASP Mobile 2014 M8 Security Decisions Via Untrusted Inputs
[16] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[17] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4, MASVS-PLATFORM-2
[18] Standards Mapping - OWASP Top 10 2004 A1 Unvalidated Input
[19] Standards Mapping - OWASP Top 10 2010 A6 Security Misconfiguration
[20] Standards Mapping - OWASP Top 10 2013 A5 Security Misconfiguration
[21] Standards Mapping - OWASP Top 10 2017 A6 Security Misconfiguration
[22] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.1
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.6
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.6
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.6
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.6
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.6
[30] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 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, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[33] 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
[34] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[56] Standards Mapping - Web Application Security Consortium Version 2.00 Application Misconfiguration (WASC-15)
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