Re: [Full-disclosure] Verizon Wireless DNS Tunneling

[James Wright <jamfwright@xxxxxxxxx>]

Actually, yes, they could provide bad data.  I believe (perhaps erroneously)
that Comcast does this.  Probably other service providers do too.  Until you
are authenticated to use their network you are redirected to a service page
that can help authenticate you.  If you have connectivity issues (like bad
cached DNS entries) after authenticating you are to reboot (or otherwise
clear the local DNS cache).

I don't really see why Verizon could not do similar.  All DNS traffic from
an unauthenticated user/machine would be redirected to a DNS server that
only returned the appropriate service page.  Most or all other traffic would
be blocked.  Much like NAC.


Thanks,
James


On Fri, Oct 7, 2011 at 10:05 AM, Dan Kaminsky <dan@xxxxxxxxxxx> wrote:

> One major reason it sticks around is -- what are you supposed to do, return
> bad data until the user is properly logged in?  It might get cached -- and
> while operating systems respect TTL, browsers most assuredly do not ("well,
> it MIGHT take us somewhere good").
>
> It's not like there's a magic off switch that makes this go away.
>
> On Fri, Oct 7, 2011 at 4:56 AM, Marshall Whittaker <
> marshallwhittaker@xxxxxxxxx> wrote:
>
>> Yes, I've found that DNS tunneling works well at the college I go to on
>> their WIFI.  I've never gotten ICMP tunneling to work myself (outside of a
>> virtual machine),  but I have some code laying around somewhere that can do
>> it just in case I need it for something sometime.  Just thought it would be
>> interesting to some people that it works on such a large provider as
>> Verizon.  The only problem with it that I see is that it's quite slow.  But
>> if it works, so be it.  Good for checking email and browsing the web and
>> such on the road.  But I wouldn't try to torrent a linux distro with it,
>> haha.
>>
>> --oxagast
>>
>> On Fri, Oct 7, 2011 at 7:39 AM, BH <lists@xxxxxxxxxxx> wrote:
>>
>>>  This comes in handy when travelling, I also found a few places where
>>> ICMP tunnelling works well.
>>>
>>>
>>> On 7/10/2011 6:35 PM, Dan Kaminsky wrote:
>>>
>>> Works mostly everywhere.  It's apparently enough of a pain in the butt to
>>> deal with, and abused so infrequently, that it's left alone.
>>>
>>> On Fri, Oct 7, 2011 at 3:32 AM, Marshall Whittaker <
>>> marshallwhittaker@xxxxxxxxx> wrote:
>>>
>>>> I recently noticed that you can tunnel TCP through DNS (I used iodine)
>>>> to penetrate Verizon Wireless' firewall.  You can connect, and if you can
>>>> hold the connection long enough to make a DNS tunnel, then the connection
>>>> stays up, then use SSH -D to create a proxy server for your traffic. Bottom
>>>> line is, you can use the internet without paying. I made a video of it.  It
>>>> can be seen here:
>>>> http://www.youtube.com/user/Oxagast?blend=2&ob=5#p/u/0/X6oWESQMVd8 I
>>>> tried to contact Verizon on their security blog about it a few weeks ago at
>>>> http://securityblog.verizonbusiness.com/ however, I have not had a
>>>> response.  This technique still works as of this posting.  Maybe this will
>>>> help them get their act together ;-)
>>>>
>>>>  --oxagast
>>>>
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>>>
>>>
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>>
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>
> _______________________________________________
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