Full Disclosure: Re: security hole on local ISP

[T Biehn <tbiehn () gmail com>]

This is an orgiastic dump of information, you must really hate ETB; or
you must be really excited for lulz.

-Travis

On Tue, Dec 29, 2009 at 5:23 AM, Cilia Pretel Gallo
<cpretelgallo () yahoo 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
>
>
>
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Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
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