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Re: Yes, trying to hack a remote control
From: gjgowey () tmo blackberry net
Date: Fri, 9 Feb 2007 00:09:40 +0000

One note about my embedded experience: the firmware file that was uploaded was a single .bin file.  It wasn't something 
that you could just tear apart with a debugger if you obtained.  It wasn't a zip file or anything "normal".  The 
firmware (when it was running) was what emulated the filesystem like interface that you were presented with in the ftp 

Sent from my BlackBerry wireless handheld.  

-----Original Message-----
From: "Brian Kerley" <kidgenius () gmail com>
Date: Thu, 8 Feb 2007 14:00:19 
To:"Dave Moore" <dave.j.moore () gmail com>
Cc:security-basics () lists securityfocus com
Subject: Re: Yes, trying to hack a remote control

Dave: you're right that I did the really basic, simple scan, so I will
do the more in depth stuff later tonight.  Quick question though.  If
I attempted a telnet into that port, and it asked for a username/pass,
does that mean the service is actually running on that port?

Geoff: Hopefully it isn't just for firmware updates....otherwise it
might have to get a little crazier, like somehow snagging the firmware
update and seeing if I can use a resource editor on it to change
anything, and then upload a modified firmware to the remote.

Everyone else, I will perform upload the scan later tonight when I get a chance.

Thanks everyone!  I got a lot more replies than I thought I would :-)

On 2/8/07, Dave Moore <dave.j.moore () gmail com> wrote:
When nmap gives you the name of a service, that name is in many cases
only the most /common/ protocol to use a port, not the one that uses
it exclusively. In other words, whichever port nmap identified as
'discard' is not necessarily running anything to do with discard
(whatever that is)

The latest versions of nmap have a feature whereby you can run scans
that will actually connect to the port in question and fetch banners
and anything else it can, and make a determination as to what is
running on the port in question with this data, which is far more

I'm assuming here that you're using a basic nmap scan, correct me if
I'm wrong. But if you are, then the open ports nmap identified as
telnet and ftp may not even be telnet and ftp. When you get into niche
stuff like this, I'd not be inclined to take nmaps word for it.

I suggest you download the latest version of nmap, and perform more
intensive scans, such as the one mentioned above. If you're still
having trouble, you should post port numbers and raw banner data (This
can be garnered by use of the service scan mentioned above with one or
two -v flags, for verbosity)

I've got Nmap version 4.21ALPHA1 atm, I would probably start with this:

nmap -sV -v -v -p 1-65535 -P0

That -p switch is to scan all known ports, which nmap does not do in a
default scan.

YMMV and all that.

Sorry if I just told you a bunch of stuff you already knew, but this
is the basics list :)


On 2/7/07, Brian Kerley <kidgenius () gmail com> wrote:
Ok, you guys are going to probably think I'm the biggest loser, but here's
what's up.

I've got a new Harmony 1000 remote from logitech. It's a new touchscreen
remote that has just came out.  Of course, I can't leave well enough alone
and would like to take a look at the inner workings of this thing.  That's
where it gets difficult and I'm hoping someone might be able to help.

The remote connects via usb using a Belcarra USB Lan Link.  The remote gets
assigned an IP address of  I've scanned it and it shows that it
is running both telnet and ftp (as well as another service called "discard"
according to nmap).  So I've tried to telnet/ftp into it using a various
combination of passwords and usernames.  I've also tried to do a dictionary
attack, but the remote shuts the service down after so many attempts.  I've
also tried using both Cain and Wireshark to analyze the packets being sent
to the remote during an update that is performed by the included software.
I got a lot of data, but I can't seem to find any plaintext passwords or
usernames in the packets.  The software running on the computer is java, and
the remote's software might be java as well.

Do you guys have any ideas on how I might be able to get into this thing?
There are also a lot of guys running linux that have other logitech remotes,
and of course are high-and-dry right now about how to update without running
a virtual environment.  If I can figure how to get in over one of these
services, then maybe it can be of some help to those guys.


A human being should be able to change a diaper, plan an invasion,
butcher a hog, conn a ship, design a building, write a sonnet, balance
accounts, build a wall, set a bone, comfort the dying, take orders,
give orders, cooperate, act alone, solve equations, analyze a new
problem, pitch manure, program a computer, cook a tasty meal, fight
efficiently, die gallantly. Specialization is for insects. -Heinlein

This message copyright (c) 2004-2007 David J Moore

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