[6628] in bugtraq
Re: name of built-in administrator
daemon@ATHENA.MIT.EDU (Vic Anderson)
Wed Apr 29 00:42:53 1998
Date: Tue, 28 Apr 1998 14:10:32 -0400
Reply-To: Vic Anderson <Vic.Anderson@ITLS.COM>
From: Vic Anderson <Vic.Anderson@ITLS.COM>
X-To: David LeBlanc <dleblanc@mindspring.com>
To: BUGTRAQ@NETSPACE.ORG
This was supposedly fixed in service pack 3, check out the release notes
for Service Pack 3, also check out KB article Q143474 concerning
limiting NULL session connections.
-----Original Message-----
From: David LeBlanc [mailto:dleblanc@MINDSPRING.COM]
Sent: Tuesday, April 28, 1998 1:12 PM
To: BUGTRAQ@NETSPACE.ORG
Subject: Re: name of built-in administrator
At 10:21 AM 4/28/98 +0400, Evgenii Borisovich Rudnyi wrote in NTBUGTRAQ:
>While learning what SID is, I have written two utilities, user2sid and
>sid2user, which are actually command line interfaces to WIN32
functions,
>LookupAccountName and LookupAccountSid. So, no hacking, just what is
>permitted by MS.
[which allows users to be extracted]
This is documented (to some extent) in a knowledge base article. I
wrote
an app which grabs all the users (and accounts for why the ISS NT
scanner
5.0 always gets the admin user, no matter what), and advised Microsoft
that
I thought this was something that should be fixed.
At this time, there is no fix for this, except to filter connections to
port 139. I've tried a couple of things I thought would fix it, but
found
that it caused severe problems. So, at the moment, if you can get a null
session, you can dump all the users, groups, and machine accounts. You
can
also cause some other problems, but they are a little arcane, and MS has
been advised (I only found it this morning, trying to make a fix for
this).
There isn't anything you can do to stop the other problems, except
filter
139, so...
IMHO, we should be able to control whether or not NT accepts null
sessions.
It is possible they are doing something about this in SP4 - they didn't
tell me whether, how or when they planned to fix it.
David LeBlanc
dleblanc@mindspring.com
