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CodeSonar® 9.2p0 CONFIDENTIAL CodeSecure Inc
Java

JAVA.JS.MEP : Missing JavaScript Entry Point (Java)

要旨

An interface is passed as a parameter to WebView.addJavascriptInterface(), but has no public methods annotated as @JavascriptInterface.

This warning class is only available for Android API version 18 and higher.

In Android API version 18 and higher, only trusted public methods that are annotated with @JavascriptInterface can be accessed from JavaScript. If an object does not have any public methods annotated as @JavascriptInterface then it is useless in a JavaScript execution because it does not have an entry point.

プロパティ

クラス名 Missing JavaScript Entry Point (Java)
日本語クラス名 Missing JavaScript Entry Point (Java)
クラス分類 信頼性 (reliability)
ニーモニック JAVA.JS.MEP
カテゴリー
CWE CWE:749 Exposed Dangerous Method or Function
OWASP-2017 OWASP-2017:A5 Broken access control
OWASP-2021 OWASP-2021:A1 Broken access control
OWASP-2025 OWASP-2025:A01 Broken Access Control
対応言語 Available for Java and Kotlin.
有効/無効設定 このワーニングクラスのチェックはデフォルトで有効になっています。チェックを無効にするにはプロジェクト設定ファイル （configuration file）に以下の WARNING_FILTER ルールを追加してください。 
WARNING_FILTER += discard class="Missing JavaScript Entry Point (Java)"

例

The warnings issued in the following code example will depend on the Android API framework used. 

package example.javascriptExecutionChecker;

import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebView;

public class JavascriptExecutionExample extends Activity {

  WebView myWebView;

  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      myWebView = new WebView(this);
      myWebView.getSettings().setJavaScriptEnabled(true); /* JavaScript Enabled (Java)
                  * warning issued here for Android API version 17 or earlier only
                  * /
      myWebView.addJavascriptInterface(new MyJavaScriptInterface(), "saymyname"); /* Warning issued here depends on Android API version:
                  * - Risky JavaScript Interface (Java) for Android API version 17 or earlier
                  * - Missing JavaScript Entry Point (Java) for Android API version 18 or later
                  * /


      myWebView.loadUrl("file:///html_pages/index.html");
      setContentView(myWebView);
  }

  final class MyJavaScriptInterface {
      MyJavaScriptInterface() { }

      public String myMessage() {
          return "Hello World!";
      }
  }
}

関連のある設定ファイルパラメータ

設定ファイルの以下のパラメータがこのワーニングクラスのチェックに影響します。

 

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