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Re: Breaking UNIXes from the Console



On Wed, 4 Feb 1998, Eli Marmor wrote:

> Hi!
> 
> The issue of breaking Linux from the console and/or achieving root
> permissions, arises again and again. As you can guess, the problem
> is not Linux' only. I know it for years, and once, even used it to
> solve a problem of a customer who forgot the root's password
> (instead of using the classic ways, I only replaced the function in
> the kernel which decides if you have the priviledged permissions,
> to a function which returns always true. The part which took most
> of the time needed, 20 moments, was learning the Assembly of the
> 68030, and what is needed to return true in this Assembly...).
> 
> Today, I saw the following message (from an Indian man) in a mailing
> list of Solaris; It uses the fact that the installation media of
> Solaris is already a system ready for booting and running (as some
> of the distributions of Linux):
> ____________________________________________________________________
> 
> Subject: Re: S-x86; more of a sparc question/root passwd lost
> 
> Insert your Solaris CD in drive
> 
> Press STOP-A
> 
> OK> boot -s cdrom
> 
> # mount -F ufs /dev/dsk/c0t0d0s0 /mnt    <------   Replace c0t0d0s0 
> with root slice of your boot disk
> 
> # cd /mnt/etc
> 
> # vi shadow
> 
> Remove the encrypted password string from entry  of root
> 
> Save the file
> 
> # cd /
> 
> # umount /mnt
> 
> # reboot
> 
> This should solve your problem
> 
> Kamal
> 
> ____________________________________________________________________
> 
> Please try it only on YOUR system!
> 
> -- 
> Eli Marmor
> marmor@elmar.co.il
> El-Mar Software Ltd.
> 
> 
> 
> 

And how would you do that to a linux-lp version of a bootdisk that has an
encryption method built into the kernel, and an encrypted initial
compressed ramdisk ?

Peter