Weird WinME Login Bug

From: Blyke (blykeat_private)
Date: Thu Aug 01 2002 - 13:47:19 PDT

  • Next message: Tim McKenzie: "Re: Comment on DMCA, Security, and Vuln Reporting]"

    Hi there,
    I just found a bug in WindowsME. Please check, if it works with you, too, or
    if it's just a local problem with my setup. I'm sorry, if someone already sent 
    this bug to the mailinglist, but I couldn't find such a thread.
    
     Regards,
    
         blyke
    
    
    
     Risk: Little?
     Weirdness factor: High
    
     This bug enables you to login to someone else's profile, without knowing
     that persons password. This is no real security risk, as you can access
     anyones files, anyway.
    
     How it works:
     Your WinME box must be configured, so it starts with the Microsoft Network
     login. After one failed login try, the normal login screen appears.
     (Thats the default setup, when using the Microsoft Network Login).
    
     1. Start your computer
     2. When the login appears, enter the users ID and some other password
     3. Now login with your own combination
     => The desktop you will see, is not yours, but the desktop of the first
     username you entered.
    
     Explanation:
     I can't really explain this phenomena, but the most likely explanation is,
     that the login functions of windows save the username of the first login
     attempt in one variable, and then just check, if the combination "username"
     and "password" are right, but don't check, if the new username entered is
     the same as the one entered in the family login. If the combination works,
     the profile, that is started, though, is the one of the username, saved
     before.
     Please inform me, if you find out anything else about that bug, or if some
     of the things, I mentioned here, prove to be wrong.
    



    This archive was generated by hypermail 2b30 : Fri Aug 02 2002 - 00:55:08 PDT