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Re: [Full-disclosure] Root password change

from [gboyce] Network Security [Permanent Link]
Subject: Re: [Full-disclosure] Root password change
Date: Fri, 31 Mar 2006 12:33:28 -0500 (EST) 
On Fri, 31 Mar 2006, Valdis.Kletnieks@vt.edu wrote:

On Fri, 31 Mar 2006 09:21:13 EST, Michael Holstein said: 
Trivial to defeat.  Just boot in to single user mode with these kernel
options:
        single init=/bin/bash


Again .. only due to initial misconfiguration.

Nobody should allow alternate switches to be passed to the kernel at
boot .. either by password-protecting the bootloader, or via firmware
(as with OpenBoot).


Of course, if you're that paranoid, you *did* configure whatever the machine
uses for a BIOS to only boot off the intended hard drive, right? ;)

In which case the person needs to remove the hard drive, and put it into a different system for the modifications (or mirroring).

For the most part, if an attacker has physical access to the hardware itself, you just lose.

--
Greg

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