JAVA.IO.INJ.FRAGMENT : Fragment Injection (Java)

// UncontrolledFragment1.java 
package com.juliasoft.julia.tests.checks.useOfUncontrolledExternalData;

import android.app.Fragment;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.preference.PreferenceActivity;
import android.webkit.WebView;

public class UncontrolledFragment1 extends PreferenceActivity  // Missing isValidFragment Override (Java) warning issued here
{
  WebView mWebView;
      
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      final String initialFragment = getIntent().getStringExtra(EXTRA_SHOW_FRAGMENT);
      final Fragment f = Fragment.instantiate(this, initialFragment, null);
      final FragmentTransaction transaction = getFragmentManager().beginTransaction();
      transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
      transaction.replace(11, f);
      transaction.commitAllowingStateLoss();                   // Fragment Injection (Java) warning issued here
  }
}

// UncontrolledFragment2.java 
package com.juliasoft.julia.tests.checks.useOfUncontrolledExternalData;

import android.app.Fragment;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.preference.PreferenceActivity;
import android.webkit.WebView;

public class UncontrolledFragment2 extends PreferenceActivity
{
  WebView mWebView;
      
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      final String initialFragment = getIntent().getStringExtra(EXTRA_SHOW_FRAGMENT);
      if(isValidFragment(initialFragment)) {
          final Fragment f = Fragment.instantiate(this, initialFragment, null);
          final FragmentTransaction transaction = getFragmentManager().beginTransaction();
          transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
          transaction.replace(11, f);
          transaction.commitAllowingStateLoss();
      }
  }

  @Override
  protected boolean isValidFragment(String fragmentName) {
      return true;                                             // Ineffective Cleansing of Fragment Taint (Java) warning issued here
  }
}

The warnings in this example are all relative to external fragments and their validation. The external fragments without or with a wrong validation could lead to security issues. As described in the Android API documentation for isValidFragment(), subclasses of PreferenceActivity should override the isValidFragment() method and verify that the given fragment is a valid type to be attached to this activity.

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JAVA.IO.INJ.FRAGMENT : Fragment Injection (Java)

要旨

プロパティ

例

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