RE: TS/3389 risk on Internet

["Keith T. Morgan" <keith.morgan () terradon com>]

People doing this always makes me itchy.  I can't speak for the
encryption of the authentication phase for TS, but we've run into
situation with the administrator named "administrator" and free to
brute-force without fear of lock-out.  There are some free (though very
slow) TS brute force tools out there.

We've also run into situations where the user email addresses matched
the account login, and the TS is almost always a domain member.  Those
accounts *could* be locked out (and some were, for proof of concept.)

I don't know if it's possible to securely offer TS to the internet.  It
very well may be possible.  But in almost every instance I've seen it
done oh-so-very-wrong.  Our nearly universal recommendation is to tunnel
it over IPSEC.


> -----Original Message-----
> From: net sec [mailto:netsec9 () hotmail com] 
> Sent: Tuesday, October 26, 2004 5:19 PM
> To: pen-test () securityfocus com
> Subject: TS/3389 risk on Internet
>
> I have a peer that insists on allowing public access to his Domain 
> controller via TS/tcp 3389 over the internet.  I know there are some 
> documented cases of 'man-in-the-middle' attacks for this 
> service but I was 
> hoping someone here could help me plead my case as to why 
> this is a bad 
> idea.  Maybe you all disagree and regurlary allow this 
> traffic.  It just 
> doesn't sit well with me.  Does anyone know if the 
> login/password is sent in 
> clear text for TS authentication?
>
> Thanks in advance for any thoughts,
> Nicole
>
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