계: Code Quality

코드 품질이 낮으면 예측할 수 없는 동작이 발생합니다. 사용자 입장에서는 사용 편의성이 떨어지는 것으로 나타나는 경우가 많습니다. 공격자에게는 예상치 못한 방법으로 시스템에 부담을 줄 수 있는 기회가 됩니다.

Unreleased Resource: Android Camera

Abstract
Android 작업이 해당 onPause(), onStop() 또는 onDestroy() 이벤트 처리기에 Camera 인스턴스를 릴리스하지 못합니다.
Explanation
Android 작업이 onPause(), onStop() 또는 onDestroy() 콜백에 릴리스되어 있지 않은 Camera 인스턴스를 할당합니다. Android OS는 현재 작업을 백그라운드로 보내야 할 때마다 또는 시스템 리소스가 낮은 경우 일시적으로 작업을 소멸시켜야 할 때 이러한 콜백을 호출합니다. Camera 개체를 올바르게 릴리스하지 못하면 해당 작업으로 인해 다른 응용 프로그램이(또는 심지어 동일한 응용 프로그램의 향후 인스턴스까지) 카메라에 접근하지 못합니다. 또한 작업이 일시 중지되어 있는 동안 Camera 인스턴스를 보유하면 불필요하게 배터리를 소모하여 사용자의 환경에 부정적인 영향을 미칠 수 있습니다.

예제 1: 다음 코드는 Camera 개체를 릴리스하는 데 사용되어야 하는 기본 onPause() 메서드를 오버라이드하지 않거나 종료 시퀀스 중 올바로 릴리스하지도 않는 Android 작업을 설명합니다.


public class UnreleasedCameraActivity extends Activity {
private Camera cam;

@Override
public void onCreate(Bundle state) {
...
}

@Override
public void onRestart() {
...
}

@Override
public void onStop() {
cam.stopPreview();
}
}
References
[1] Camera, Android Developers
[2] FIO04-J. Release resources when they are no longer needed CERT
[3] DOS-2: Release resources in all cases Oracle
[4] Standards Mapping - Common Weakness Enumeration CWE ID 772
[5] Standards Mapping - Common Weakness Enumeration Top 25 2019 [21] CWE ID 772
[6] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001094
[7] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-5 Denial of Service Protection (P1)
[8] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-5 Denial of Service Protection
[9] Standards Mapping - OWASP Top 10 2004 A9 Application Denial of Service
[10] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.9
[11] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.6
[12] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.6
[13] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.6
[14] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.6
[15] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[16] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[17] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[18] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection
[19] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective C.3.3 - Web Software Attack Mitigation
[20] Standards Mapping - SANS Top 25 2009 Risky Resource Management - CWE ID 404
[21] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP6080 CAT II
[22] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP6080 CAT II
[23] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP6080 CAT II
[24] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP6080 CAT II
[25] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP6080 CAT II
[26] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP6080 CAT II
[27] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP6080 CAT II
[28] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002400 CAT II
[29] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002400 CAT II
[30] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002400 CAT II
[31] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002400 CAT II
[32] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002400 CAT II
[33] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002400 CAT II
[34] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002400 CAT II
[35] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002400 CAT II
[36] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002400 CAT II
[37] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002400 CAT II
[38] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002400 CAT II
[39] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002400 CAT II
[40] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002400 CAT II
[41] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002400 CAT II
[42] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002400 CAT II
[43] Standards Mapping - Web Application Security Consortium Version 2.00 Denial of Service (WASC-10)
[44] Standards Mapping - Web Application Security Consortium 24 + 2 Denial of Service
desc.controlflow.java.unreleased_resource_android_camera