[14006] in bugtraq
Re: Toshiba NoteBooks BIOS Password Backdoor - Password Cracker -
daemon@ATHENA.MIT.EDU (Doctor Muerte)
Thu Feb 24 16:38:34 2000
Message-Id: <20000223225208.18196.qmail@securityfocus.com>
Date: Wed, 23 Feb 2000 22:52:08 -0000
Reply-To: Doctor Muerte <drmuerte2000@YAHOO.ES>
From: Doctor Muerte <drmuerte2000@YAHOO.ES>
X-To: bugtraq@securityfocus.com
To: BUGTRAQ@SECURITYFOCUS.COM
In-Reply-To: <Pine.SUN.3.94.980515163136.13843f-100000@dfw.dfw.net>
The one and only way to bypass the Power On BIOS password
of a Toshiba Notebook. This method works on all models.
This is what you need:
1. Your notebook
2. An empty formatted diskette (720 kb or 1,44 mb)
3. A second computer (e.g. a DOS desktop PC)
4. A hex-editor (e.g. Norton DiskEdit or HexWorks)
This is what you have to do:
1. Start the desktop PC and start the hex-editor
2. Put the disk in drive A:
3. Change the first five bytes of sector 1 (boot sector is
sector 0) to: 4B 45 59 00 00
4. Save it! Now you have a KEYDISK
5. Remove the disk from drive A:
6. Put the disk in the notebook drive
7. Start the notebook in Boot Mode (push the reset button)
8. Press Enter when asked for Password:
9. You will be asked to Set Password again. Press Y and
Enter.
10. You now see the BIOS configuration where you can set a
new password.
And that's all!
Oscar Vila
