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 Camera Resource
Abstract
程式碼在
Camera 被解除之後，參照該物件。Explanation
程式碼嘗試在
範例：以下程式碼使用了切換按鈕以開關相機預覽。在使用者點選按鈕後，相機預覽便會停止，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
Camera 物件被解除之後，使用該物件。若在未重新要求 Camera 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：以下程式碼使用了切換按鈕以開關相機預覽。在使用者點選按鈕後，相機預覽便會停止，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
Camera 物件上呼叫 startPreview()。
public class ReuseCameraActivity extends Activity {
private Camera cam;
...
private class CameraButtonListener implements OnClickListener {
public void onClick(View v) {
if (toggle) {
cam.stopPreview();
cam.release();
}
else {
cam.startPreview();
}
toggle = !toggle;
}
}
...
}
References
[1] Camera, Android Developers
[2] Standards Mapping - Common Weakness Enumeration CWE ID 416
[3] Standards Mapping - Common Weakness Enumeration Top 25 2019 [1] CWE ID 119, [7] CWE ID 416
[4] Standards Mapping - Common Weakness Enumeration Top 25 2020 [5] CWE ID 119, [8] CWE ID 416
[5] Standards Mapping - Common Weakness Enumeration Top 25 2021 [7] CWE ID 416
[6] Standards Mapping - Common Weakness Enumeration Top 25 2022 [7] CWE ID 416
[7] Standards Mapping - Common Weakness Enumeration Top 25 2023 [4] CWE ID 416
[8] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001094
[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)
[11] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-5 Denial of Service Protection
[12] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4
[13] Standards Mapping - OWASP Top 10 2004 A9 Application Denial of Service
[14] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.9
[15] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.6
[16] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.6
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.6
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.6
[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 4.2 - Critical Asset Protection
[21] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection
[22] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection
[23] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP6080 CAT II
[24] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP6080 CAT II
[25] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP6080 CAT II
[26] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP6080 CAT II
[27] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP6080 CAT II
[28] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP6080 CAT II
[29] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP6080 CAT II
[30] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002400 CAT II
[31] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002400 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002400 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002400 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002400 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002400 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002400 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002400 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002400 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002400 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002400 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002400 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002400 CAT II
[43] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002400 CAT II
[44] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002400 CAT II
[45] Standards Mapping - Web Application Security Consortium Version 2.00 Denial of Service (WASC-10)
[46] Standards Mapping - Web Application Security Consortium 24 + 2 Denial of Service
desc.controlflow.java.android_bad_practices_use_of_released_camera_resource