Crack 5.0 - How to safely collect passwd files?

Crack 5.0 - How to safely collect passwd files?

Post by Rune Mossi » Fri, 21 Feb 1997 04:00:00



How do You safely collect local /etc/passwd files into a central
machine, so that Crack can be run on them? I have about 15 mamachines
I'd like to check, a mixture of AIX, SCO and SunOS 4.1.3 machines.

From cron as root on each machine, and then rcp to central machine?
rdist?

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Crack 5.0 - How to safely collect passwd files?

Post by Alec Muffet » Mon, 24 Feb 1997 04:00:00



> How do You safely collect local /etc/passwd files into a central
> machine, so that Crack can be run on them? I have about 15 mamachines
> I'd like to check, a mixture of AIX, SCO and SunOS 4.1.3 machines.

Good question; alas I have no advice since it is one of those things
that really depends on your site security policy, which I know nothing
about.

If you have shadow passwd files, you will need to retieve them with
root access; other than that, there should be no real need to use root
access to remote fetch the files.

--
# If you e-mail a reply to this message, please modify the "To:" address.
# alec muffett, oxford, uk - http://www.users.dircon.co.uk/~crypto/
# below: password cracker in one line of perl; echo guess | perl [args]
perl -nle 'setpwent;crypt($_,$c)eq$c&&print"$u=$_"while($u,$c)=getpwent'

 
 
 

1. Editing a passwd file safely

Hi,

Looking to edit a passwd file but obviously this file can change so
that when you save it you overwrite any changes.

Thinking about this quickly the procedure I can think of would be to
right two functions:

edpasswd.sh passwd
------------------
cp passwd passwd.old
cp passwd passwd.edit
pico passwd.edit

cppasswd.sh passwd.edit passwd
------------------------------
if (! diff passwd passwd.old)
then
    #no changes have been made
    cp passwd.edit passwd;
else
    echo "passwd has changed since edit.";
fi

I somehow doubt that is standard practice though - how do you experts
handle this?

Daniel

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