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.

Cross-Site Scripting: External Links

Java/JSP

Abstract

O envio de dados não validados para um navegador web pode causar a execução de códigos mal-intencionados. As configurações na configuração podem minimizar e reduzir a exposição a scripts entre sites

Explanation

Vulnerabilidades de XSS (criação de script entre sites) ocorrem quando:

1. Dados entram em um aplicativo Web por meio de uma fonte não confiável, mais frequentemente uma solicitação web ou banco de dados.

2. Os dados são incluídos no conteúdo dinâmico enviado a um usuário da Web sem validação.

O conteúdo mal-intencionado enviado ao navegador web geralmente assume a forma de um segmento JavaScript, mas também pode incluir HTML, Flash ou qualquer outro tipo de código que o navegador executa. A variedade de ataques com base em XSS é quase ilimitada, mas costuma incluir a transmissão de dados privados, como cookies ou outras informações de sessão, para o invasor, o redirecionamento da vítima para um conteúdo web controlado pelo invasor ou a realização de outras operações mal-intencionadas na máquina do usuário, sob a aparência do site vulnerável.

Como os ataques contra vulnerabilidades XSS geralmente envolvem comunicação ou redirecionamento para um site mal-intencionado controlado pelo invasor, a capacidade de injetar referências a conteúdo em outros domínios é parte integrante de muitas explorações. O AntiSamy pode ser configurado para evitar links para domínios externos, o que diminui os danos que um invasor pode causar por meio de um ataque XSS. No entanto, essa proteção é apenas uma solução parcial e não aborda a ameaça geral representada pelas vulnerabilidades XSS.

Exemplo 1: A seguinte entrada de configuração do AntiSamy permite links para URLs fora do domínio no qual o aplicativo está sendo executado.


		<attribute name="href" onInvalid="filterTag">
			<regexp-list>
				<regexp name="onsiteURL"/>
				<regexp name="offsiteURL"/>
			</regexp-list>
		</attribute>

References

[1] Understanding Malicious Content Mitigation for Web Developers CERT

[2] HTML 4.01 Specification W3

[3] Standards Mapping - CIS Azure Kubernetes Service Benchmark 5

[4] Standards Mapping - CIS Microsoft Azure Foundations Benchmark complete

[5] Standards Mapping - CIS Amazon Elastic Kubernetes Service Benchmark 5

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

[7] Standards Mapping - CIS Google Kubernetes Engine Benchmark integrity

[8] Standards Mapping - CIS Kubernetes Benchmark complete

[9] Standards Mapping - Common Weakness Enumeration CWE ID 79, CWE ID 82, CWE ID 83, CWE ID 87, CWE ID 692

[10] Standards Mapping - Common Weakness Enumeration Top 25 2019 [2] CWE ID 079

[11] Standards Mapping - Common Weakness Enumeration Top 25 2020 [1] CWE ID 079

[12] Standards Mapping - Common Weakness Enumeration Top 25 2021 [2] CWE ID 079

[13] Standards Mapping - Common Weakness Enumeration Top 25 2022 [2] CWE ID 079

[14] Standards Mapping - Common Weakness Enumeration Top 25 2023 [2] CWE ID 079

[15] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001167, CCI-001310

[16] Standards Mapping - FIPS200 SI

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

[18] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-18 Mobile Code (P2)

[19] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-18 Mobile Code

[20] Standards Mapping - OWASP Top 10 2004 A4 Cross Site Scripting

[21] Standards Mapping - OWASP Top 10 2007 A1 Cross Site Scripting (XSS)

[22] Standards Mapping - OWASP Top 10 2010 A2 Cross-Site Scripting (XSS)

[23] Standards Mapping - OWASP Top 10 2013 A3 Cross-Site Scripting (XSS)

[24] Standards Mapping - OWASP Top 10 2017 A7 Cross-Site Scripting (XSS)

[25] Standards Mapping - OWASP Top 10 2021 A03 Injection

[26] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.3.3 Output Encoding and Injection Prevention Requirements (L1 L2 L3), 5.3.6 Output Encoding and Injection Prevention Requirements (L1 L2 L3)

[27] Standards Mapping - OWASP Mobile 2014 M7 Client Side Injection

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

[29] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.4

[30] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.1

[31] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.7

[32] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.7

[33] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.7

[34] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.7

[35] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.7

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

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

[38] 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

[39] 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

[40] Standards Mapping - SANS Top 25 2009 Insecure Interaction - CWE ID 116

[41] Standards Mapping - SANS Top 25 2010 Insecure Interaction - CWE ID 079

[42] Standards Mapping - SANS Top 25 2011 Insecure Interaction - CWE ID 079

[43] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I, APP3580 CAT I

[44] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3580 CAT I

[45] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3580 CAT I

[46] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3580 CAT I

[47] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3580 CAT I

[48] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3580 CAT I

[49] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3580 CAT I

[50] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[51] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[52] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[53] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[54] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[55] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[56] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[57] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[58] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[59] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[60] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[61] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[62] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002490 CAT I, APSC-DV-003300 CAT II

[63] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002490 CAT I, APSC-DV-002530 CAT II, APSC-DV-003300 CAT II

[64] Standards Mapping - Web Application Security Consortium Version 2.00 Cross-Site Scripting (WASC-08)

[65] Standards Mapping - Web Application Security Consortium 24 + 2 Cross-Site Scripting

desc.config.java.xss_external_links