Reino: Errors

Os erros e o processamento de erros representam uma classe de API. Erros relacionados com o processamento de erros são tão comuns que merecem um domínio próprio. Assim como no “abuso de API”, há duas formas de introduzir uma vulnerabilidade de segurança relacionada com erros. A primeira, e mais comum, é processar os erros indevidamente (ou não os processar). A segunda é produzir erros que revelem muitas informações (a possíveis invasores) ou que sejam difíceis de processar.

Poor Error Handling: Program Catches NullReferenceException

Abstract
Em geral, capturar NullReferenceException é uma prática imprópria.
Explanation
Em geral, os programadores capturam NullReferenceException em três circunstâncias:

1. O programa contém um cancelamento de referência a ponteiro nulo. Capturar a exceção resultante foi mais fácil do que corrigir o problema subjacente.

2. O programa lança explicitamente uma NullReferenceException para sinalizar uma condição de erro.

3. O código faz parte de um conjunto de teste que fornece entradas inesperadas para as classes sob teste.

Dessas três circunstâncias, somente a última é aceitável.

Exemplo: O seguinte código captura uma NullReferenceException por engano.

  try {
    MysteryMethod();
  }
  catch (NullReferenceException npe) {
  }
References
[1] Standards Mapping - CIS Azure Kubernetes Service Benchmark 1
[2] Standards Mapping - CIS Amazon Elastic Kubernetes Service Benchmark 5
[3] Standards Mapping - CIS Amazon Web Services Foundations Benchmark 1
[4] Standards Mapping - CIS Google Kubernetes Engine Benchmark normal
[5] Standards Mapping - Common Weakness Enumeration CWE ID 395
[6] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001312, CCI-001314, CCI-003272
[7] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[8] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-11 Error Handling (P2)
[9] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-11 Error Handling
[10] Standards Mapping - OWASP Top 10 2004 A7 Improper Error Handling
[11] Standards Mapping - OWASP Top 10 2007 A6 Information Leakage and Improper Error Handling
[12] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.7
[13] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.2, Requirement 6.5.6
[14] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.5
[15] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.5
[16] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.5
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.5
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.5
[19] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[20] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 3.6 - Sensitive Data Retention
[21] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 3.6 - Sensitive Data Retention
[22] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 3.6 - Sensitive Data Retention
[23] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3120 CAT II
[24] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3120 CAT II
[25] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3120 CAT II
[26] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3120 CAT II
[27] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3120 CAT II
[28] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3120 CAT II
[29] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3120 CAT II
[30] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[31] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
desc.structural.dotnet.poor_error_handling_program_catches_nullreferenceexception