界: Code Quality

程式碼品質不佳，會導致無法預料的行為。從使用者的角度來看，這通常表現為可用性不佳。對於攻擊者而言，這提供了以意想不到的方式向系統施加壓力的機會。

Android Bad Practices: Use of Released Media Resource

Java/JSP

Abstract

程式碼在 Android 媒體物件被解除之後，參照該物件。

Explanation

程式碼嘗試在媒體物件被解除之後使用該物件。若在未重新要求媒體物件的情況下參照該資源，便會拋出異常，並在未能捕捉異常時造成應用程式當機。

範例：以下程式碼使用了暫停按鈕以切換媒體播放。在使用者點選按鈕後，目前的歌曲或視訊便會停止，並解除相機資源。但是，如果再次點選按鈕，則會在先前解除的媒體物件上呼叫 start()。


public class ReuseMediaPlayerActivity extends Activity {
  private MediaPlayer mp;

  ...
  private class PauseButtonListener implements OnClickListener {
      public void onClick(View v) {
          if (paused) {
              mp.pause();
              mp.release();
          }
          else {
              mp.start();
          }
          paused = !paused;
      }
  }
  ...
}

References

[1] Media Player, Android Developers

[2] Audio Capture, Android Developers

[3] Standards Mapping - CIS Azure Kubernetes Service Benchmark 1

[4] Standards Mapping - CIS Amazon Elastic Kubernetes Service Benchmark 4

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

[6] Standards Mapping - CIS Google Kubernetes Engine Benchmark normal

[7] Standards Mapping - Common Weakness Enumeration CWE ID 416

[8] Standards Mapping - Common Weakness Enumeration Top 25 2019 [1] CWE ID 119, [7] CWE ID 416

[9] Standards Mapping - Common Weakness Enumeration Top 25 2020 [5] CWE ID 119, [8] CWE ID 416

[10] Standards Mapping - Common Weakness Enumeration Top 25 2021 [7] CWE ID 416

[11] Standards Mapping - Common Weakness Enumeration Top 25 2022 [7] CWE ID 416

[12] Standards Mapping - Common Weakness Enumeration Top 25 2023 [4] CWE ID 416

[13] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001094

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

[15] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-5 Denial of Service Protection (P1)

[16] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-5 Denial of Service Protection

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

[18] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4

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

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

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

[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 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 4.0 Requirement 6.2.4

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

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

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

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

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

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

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

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

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

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

[35] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002400 CAT II

[36] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002400 CAT II

[37] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002400 CAT II

[38] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002400 CAT II

[39] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002400 CAT II

[40] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002400 CAT II

[41] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002400 CAT II

[42] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002400 CAT II

[43] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002400 CAT II

[44] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002400 CAT II

[45] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002400 CAT II

[46] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002400 CAT II

[47] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002400 CAT II

[48] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002400 CAT II

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

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

desc.controlflow.java.android_bad_practices_use_of_released_media_resource