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List:       security-basics
Subject:    Re: Windows Remote Desktop - any known vulnerabilities?
From:       Mitch Brandt <systems () tanelorn ! info>
Date:       2010-12-02 21:11:37
Message-ID: AANLkTinrJBQzSDaJ4EdKxSBKVZAeYx=cb9cw8L3YUMvu () mail ! gmail ! com
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Sorry if this is a repeat but I got a bounce message from when I sent
it previously.  Since this topic is still breathing I thought I would
try again.

There are 2 big issues-

1)  RDP is not encrypted;
2)  You opened a port in your firewall for a well known service.  You
can change which port rdp listens on or have your router redirect one
port to another as it forwards.

I know some people use rdp only with a vpn which eliminates the above issues.

Mitch

On Tue, Nov 30, 2010 at 12:24 PM, Matthew Hulse
<matthew.hulse@sbcglobal.net> wrote:
> 
> I've seen a couple of articles talking about this error message occurring
> when someone connects through RDP and then disconnects without successfully
> authenticating.
> 
> I would venture to guess that someone did establish a connection to your
> computer, but more than likely didn't get any further than that. If the
> person attempting to gain access doesn't have a valid username/password,
> then there's probably no compromise. You can check the security event log at
> those time periods and see if there were any successful logons, but I think
> that logging option is turned off by default. If so, there won't be any
> trace there.
> 
> I personally don't know of any vulnerabilities in Remote Desktop that are
> being exploited (not saying that there aren't any).
> 
> M@
> 
> -----Original Message-----
> From: listbounce@securityfocus.com [mailto:listbounce@securityfocus.com] On
> Behalf Of Chuck Mayers
> Sent: Saturday, November 27, 2010 8:21 PM
> To: security-basics@securityfocus.com
> Subject: Windows Remote Desktop - any known vulnerabilities?
> 
> About 6 months ago, I wanted to connect to my home computer (which runs
> Windows 7) from work, so I enabled Remote Desktop, with the option "Allow
> connections from computers running any version of Remote Desktop (less
> secure)". It was a one time thing, and I've never used it since. I left
> these options on.
> 
> Today I noticed an event in the event log:
> 
> The RDP protocol component X.224 detected an error in the protocol stream
> and has disconnected the client.
> 
> This same error also appears one other time, 2 months ago.
> 
> I've googled the message, it sounds like it could simply be an error you'd
> get if a remote user closed his session... except that there shouldn't be
> any remote users! At the time of the event, I'm not even sure if I was using
> the computer, but I know that I have not used RDP for 6 months and no one
> else should be connecting.
> 
> Are there any known Remote Desktop vulnerabilities (for a PC acting as the
> server) that I should be worried about?
> 
> Is there any other way this event would be in the event log, besides the
> obvious - someone had connected to my PC?
> 
> I looked in the event log for anything obviously strange around the times of
> these events, and I don't see anything. The PC seems fine and I don't have
> any reason to think it was compromised except for this strange event
> message.
> 
> I'm wondering if there is anything else I can check for, to figure out what
> this cryptic message means.
> 
> Thanks
> 
> ------------------------------------------------------------------------
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> 
> ------------------------------------------------------------------------
> Securing Apache Web Server with thawte Digital Certificate
> In this guide we examine the importance of Apache-SSL and who needs an SSL \
> certificate.  We look at how SSL works, how it benefits your company and how your \
> customers can tell if a site is secure. You will find out how to test, purchase, \
> install and use a thawte Digital Certificate on your Apache web server. Throughout, \
> best practices for set-up are highlighted to help you ensure efficient ongoing \
> management of your encryption keys and digital certificates. 
> http://www.dinclinx.com/Redirect.aspx?36;4175;25;1371;0;5;946;e13b6be442f727d1
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> 

------------------------------------------------------------------------
Securing Apache Web Server with thawte Digital Certificate
In this guide we examine the importance of Apache-SSL and who needs an SSL \
certificate.  We look at how SSL works, how it benefits your company and how your \
customers can tell if a site is secure. You will find out how to test, purchase, \
install and use a thawte Digital Certificate on your Apache web server. Throughout, \
best practices for set-up are highlighted to help you ensure efficient ongoing \
management of your encryption keys and digital certificates.

http://www.dinclinx.com/Redirect.aspx?36;4175;25;1371;0;5;946;e13b6be442f727d1
------------------------------------------------------------------------


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