界: Errors

错误和错误处理代表一类 API。与错误处理相关的错误非常普遍，因此它们应该拥有自己的专属章节。与“API 滥用”一样，有两种情况可以引入与错误相关的安全漏洞：最常见的一种是错误处理不当（或者根本不处理）。第二种是产生错误，这些错误要么（向潜在的攻击者）泄露过多信息，要么难以处理。

Poor Error Handling: Program Catches NullPointerException

Abstract
通常来说，捕获 NullPointerException 并不是一个好方法。
Explanation
程序员通常会在以下三种情况中捕获 NullPointerException：

1.程序包含一个 null 指针间接引用。捕获生成的异常比修复底层问题更容易。

2. 程序显式地抛出了一个 NullPointerException 异常来标记错误状况。

3. 该代码是测试代码的一部分，为正在测试的类提供了一个异常输入。

在上述三种情况中，只有最后一种是可以接受的。

示例：下列代码错误地捕获了一个 NullPointerException 异常。


  try {
    mysteryMethod();
  }
  catch (NullPointerException npe) {
  }
References
[1] ERR08-J. Do not catch NullPointerException or any of its ancestors CERT
[2] Standards Mapping - Common Weakness Enumeration CWE ID 395
[3] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001312, CCI-001314, CCI-003272
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - NIST Special Publication 800-53 Revision 4 SA-15 Development Process and Standards and Tools (P2), SI-11 Error Handling (P2)
[6] Standards Mapping - NIST Special Publication 800-53 Revision 5 SA-15 Development Process and Standards and Tools, SI-11 Error Handling
[7] Standards Mapping - OWASP Top 10 2004 A7 Improper Error Handling
[8] Standards Mapping - OWASP Top 10 2007 A6 Information Leakage and Improper Error Handling
[9] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.7
[10] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.2, Requirement 6.5.6
[11] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.5
[12] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.5
[13] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.5
[14] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.5
[15] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.5
[16] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[17] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 3.6 - Sensitive Data Retention
[18] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 3.6 - Sensitive Data Retention
[19] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 3.6 - Sensitive Data Retention
[20] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3120 CAT II
[21] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3120 CAT II
[22] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3120 CAT II
[23] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3120 CAT II
[24] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3120 CAT II
[25] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3120 CAT II
[26] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3120 CAT II
[27] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[28] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[29] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[30] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[31] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002570 CAT II, APSC-DV-002580 CAT II, APSC-DV-003235 CAT II
desc.structural.java.poor_error_handling_program_catches_nullpointerexception