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Re: Fatal bug in NT 4.0 server

daemon@ATHENA.MIT.EDU (Yiorgos Adamopoulos)
Mon Apr 7 14:35:25 1997

Date: 	Mon, 7 Apr 1997 14:26:23 +0300
Reply-To: Y.Adamopoulos@noc.ntua.gr
From: Yiorgos Adamopoulos <Y.Adamopoulos@NOC.NTUA.GR>
X-To:         vytasvy@OSF.LT
To: BUGTRAQ@NETSPACE.ORG
In-Reply-To:  <Pine.LNX.3.95.970402120122.30846B-100000@uba.osf.lt> from
              "Vytautas Vysniauskas" at Apr 2, 97 02:37:33 pm

>     It is known about big hole in NT 4.0 security system
>     that allows for a user without any access permission to mount NT
>     server root directory (disk C:) in r/w mode and to take a
>     complete control over NT system ? I heard only some little

Under 4.0 (no service packs) it is possble to mount drive C: (and any other
drive) R/W if you have a user account.  Note that this is the default
installation and therefore it is not a bug but a missconfiguration:

smbclient '\\ntserver\c$' -U user

should give you the smb> prompt.

Installing SP2 removes these defaults.

-Yiorgos.

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