full-disclosure - Re: security hole on local ISP

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Date: Tue, 29 Dec 2009 11:36:15 -0500
From: Lee <ler762@...il.com>
To: full-disclosure@...ts.grok.org.uk
Subject: Re: security hole on local ISP

On Tue, Dec 29, 2009 at 10:23 AM, T Biehn <tbiehn@...il.com> wrote:

> This is an orgiastic dump of information, you must really hate ETB; or
> you must be really excited for lulz.
>
or you're hoping that full disclosure will get ETB to fix the problem.

Regard,
Lee


> -Travis
>
> On Tue, Dec 29, 2009 at 5:23 AM, Cilia Pretel Gallo
> <cpretelgallo@...oo.com> wrote:
> > I've recently discovered a security hole on the modems (which double as
> routers) used by a Colombian ISP - ETB.
> >
> > It so happens that all incoming connections to an IP address on said ISP
> on port 23 or port 80 land on the modem instead of the computer(s) connected
> to it. Even if one tries to redirect those ports to a local machine, the
> modem still gets all the connections on those ports.
> > Also, connections on ports 23 and 80, from any IP address, will access
> the modem configuration options. Last year that could be done only from
> private IP addresses (i.e. 192.168.0/24), but now it can be done, as I said,
> from anywhere. I've been told that a few lucky users were able to forward
> port 80, but in that case, it's port 8080 that is intercepted by the modem.
> > The end result is that anyone, from anywhere, can access the modem of
> anyone on ETB to mess up their configuration (e.g. obtaining and changing
> the client's username and password, permanently disconnecting them from the
> internet, and so on) - that is, if they have the administration password.
> Unfortunately, ETB uses the same login/password on all of their modems since
> 2006, which are publicly available on the web.
> > Login: Administrator
> > Password: soporteETB2006
> >
> > The whole IP range 190.24/14 corresponds to ETB clients. Any IP on that
> range where ports 80 and 23 are open is most likely a wide open ETB modem.
> >
> > Apparently, this issue has been repeatedly reported to ETB, but it always
> falls on deaf ears. They seem to think this is no big deal since nobody
> knows the username and password for the modems - which is not the case, and
> even if it were, they would be easily crackable by brute force.
> >
> > Peace,
> >
> > -Cilia
> >
> >
> >
> >
>  ____________________________________________________________________________________
> > ¡Obtén la mejor experiencia en la web!
> > Descarga gratis el nuevo Internet Explorer 8.
> > http://downloads.yahoo.com/ieak8/?l=e1
> >
> > _______________________________________________
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> >
>
>
>
> --
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> http://pgp.mit.edu:11371/pks/lookup?search=tbiehn&op=index&fingerprint=on
> http://pastebin.com/f6fd606da
>
> _______________________________________________
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Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
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