Re: Reseting root password Was: user name from security logs

From: Steven McIntosh (s.mcintosh_at_compserv.gla.ac.uk)
Date: 06/02/05

  • Next message: KillKenny: "Re: Resetting the root password (was: user name from security logs)"
    Date: Thu, 02 Jun 2005 12:53:04 +0100
    To: Robert Reed <rreed567@earthlink.net>
    
    

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    Like wise, remove the "x", which references the shadow file, from the
    root entry in the passwd file and hey presto. Instant access for root on
    reboot with no password.

    Robert Reed wrote:
    > yes there is a way to get control back..... I'm not clear if you are
    > referring to a Linux box or windows.... please clarify?
    >
    > for windows boxes there are live Linux distros that will allow you to change
    > the admin password....... with Linux you can attack the shadow password file
    > and delete the admin password... then log on as root and create a new
    > password for the root account
    >
    > ----- Original Message -----
    > From: "Alexander Klimov" <alserkli@inbox.ru>
    > To: "Emmanuel Goldstein" <goldstein101@gmail.com>
    > Cc: <security-basics@securityfocus.com>
    > Sent: Tuesday, May 31, 2005 1:33 AM
    > Subject: Reseting root password Was: user name from security logs
    >
    >
    >
    >>On Sun, 29 May 2005, Emmanuel Goldstein wrote:
    >>
    >>>I have physical access to the computer and i can also access all hd's
    >>>files using a LiveCD linux distribution.
    >>>
    >>>So, here's my question: Is there anyway to change the admin password
    >>>and/or get the machine's control back?
    >>
    >>Boot a LiveCD, mount the root partition:
    >>
    >>mkdir /tmp/a; mount /dev/hda1 /tmp/a
    >>
    >>chroot to it:
    >>
    >>chroot /tmp/a
    >>
    >>and change the password:
    >>
    >>passwd
    >>
    >>Depending of authentication method used you can do it more directly,
    >>e.g., changing a line in /etc/shadow:
    >>
    >>root:password-hash:....
    >>
    >>to
    >>
    >>root::....
    >>
    >>--
    >>Regards,
    >>ASK
    >
    >

    - --
    Steven McIntosh
    Information Systems Security Officer
    Computing Service
    James Watt North Building
    University of Glasgow
    Glasgow
    G12 8QQ
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