Reino: Environment

Esta seção contém tudo o que fica fora do código-fonte, porém que é essencial para a segurança do produto que está sendo criado. Como os problemas tratados neste domínio não são diretamente relacionados com o código-fonte, nós o separamos dos demais domínios.

Weak XML Schema: Unbounded Occurrences

Universal

Abstract

Configurar um valor maxOccurs ilimitado pode levar ao esgotamento de recursos e, por fim, a uma denial of service.

Explanation

O processamento de documentos XML pode ser caro do ponto de vista computacional. Os invasores podem tirar vantagem de esquemas que permitem elementos ilimitados, fornecendo a um aplicativo um grande número de elementos, fazendo com que o aplicativo esgote os recursos do sistema.

A seguir está um exemplo de um esquema que permite elementos ilimitadas bar.


<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" >
  <xs:element name="foo" >
    <xs:complexType>
      <xs:sequence>
	<xs:element name="bar" maxOccurs="unbounded" />
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>

References

[1] XML Schema Part 1: Structures Second Edition W3C

[2] Roger L. Costello Constrain the Number of Occurrences of Elements in your XML Schema

[3] Standards Mapping - Common Weakness Enumeration CWE ID 400, CWE ID 770

[4] Standards Mapping - Common Weakness Enumeration Top 25 2019 [20] CWE ID 400

[5] Standards Mapping - Common Weakness Enumeration Top 25 2020 [23] CWE ID 400

[6] Standards Mapping - Common Weakness Enumeration Top 25 2022 [23] CWE ID 400

[7] Standards Mapping - Common Weakness Enumeration Top 25 2024 [24] CWE ID 400

[8] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001094, CCI-001310, CCI-002385

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

[10] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-5 Denial of Service Protection (P1), SI-10 Information Input Validation (P1)

[11] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-5 Denial of Service Protection, SI-10 Information Input Validation

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

[13] Standards Mapping - OWASP Application Security Verification Standard 4.0 8.1.4 General Data Protection (L2 L3), 11.1.3 Business Logic Security Requirements (L1 L2 L3), 11.1.4 Business Logic Security Requirements (L1 L2 L3), 12.1.1 File Upload Requirements (L1 L2 L3), 12.1.3 File Upload Requirements (L2 L3), 13.2.4 RESTful Web Service Verification Requirements (L2 L3)

[14] Standards Mapping - OWASP Mobile 2014 M1 Weak Server Side Controls

[15] Standards Mapping - OWASP Mobile 2024 M8 Security Misconfiguration

[16] Standards Mapping - OWASP Top 10 2004 A9 Application Denial of Service

[17] Standards Mapping - OWASP Top 10 2010 A6 Security Misconfiguration

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

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

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

[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.9

[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.6

[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.6

[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.6

[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.6

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

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

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

[29] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection

[30] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection

[31] Standards Mapping - SANS Top 25 2010 Risky Resource Management - CWE ID 770

[32] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP6080 CAT II

[33] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP6080 CAT II

[34] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP6080 CAT II

[35] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP6080 CAT II

[36] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP6080 CAT II

[37] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP6080 CAT II

[38] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP6080 CAT II

[39] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I

[40] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I

[41] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I

[42] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I

[43] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I

[44] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I

[45] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I

[46] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I

[47] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I

[48] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I

[49] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I

[50] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I

[51] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I

[52] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I

[53] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I

[54] Standards Mapping - Security Technical Implementation Guide Version 6.2 APSC-DV-002390 CAT II, APSC-DV-002400 CAT II, APSC-DV-002550 CAT I

[55] Standards Mapping - Web Application Security Consortium Version 2.00 Denial of Service (WASC-10)

[56] Standards Mapping - Web Application Security Consortium 24 + 2 Denial of Service

desc.config.xml.weak_xml_schema_unbounded_occurrences