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mikebrown Posted:
there, Please
check out -

In The Forum:
Hard Wiring - Installation
Hardwiring in a Rental House
On Oct 24, 2017 at 22:29:48

mikebrown Posted:
Hello, I think
you should consult
it with the Expert
they can surely
help you

In The Forum:
Hard Wiring - Installation
Hardwiring in a Rental House
On Jun 24, 2017 at 09:15:34

Haniltery Posted:
For wipe call
history also some
of the offline, in
gengral , it
usually apply to

In The Forum:
How to Delete call history from online account?
On May 09, 2017 at 06:14:26

diana87 Posted:
You have to use
VPN service to
and get free
access while

In The Forum:
Recent calling problem from Egypt
On May 02, 2017 at 17:28:06

dconnor Posted:
What is the main
number on the
account? And
which one is the
virtual number?

In The Forum:
Vonage UK
How do you call 999
On Apr 27, 2017 at 18:52:02

Trafford Posted:
Seems like a
question. We
rely exclusively
on a Vonage system
for our

In The Forum:
Vonage UK
How do you call 999
On Apr 27, 2017 at 10:42:50

diazou Posted:
Hello, It's
compatible with
Android your phone
? Thanks!

In The Forum:
IP PBX for small business
On Mar 28, 2017 at 12:42:33

jeddaisg Posted:
Hi all We have
a Vonage VOIP
system for our
office. Lately,
our call quality

In The Forum:
Ethernet Cable; Wiring schematic? 568-B?
On Feb 23, 2017 at 18:33:52

beast321 Posted:
I don't know if
you heard, that
many more
Dreamcast games
are opened up

In The Forum:
Fax - Tivo - Alarms
Using phone as a dial up modem for Dreamcast Gaming
On Feb 16, 2017 at 03:16:51

Av8rix Posted:
Sorry to start a
new thread on an
old topic but when
I google “Vonage
MAC address

In The Forum:
New adapter and router -- MAC change
On Jan 11, 2017 at 01:07:21

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Vonage What is a customer's risk? The highest risk comes to businesses who would

What is a customer's risk?

The highest risk comes to businesses who would be impacted by loss of incoming calls. An ordinary user on an unlimited plan may never notice that someone was placing outgoing calls unless they made international calls. Since calls to toll numbers (900, 976) aren't generally possible on Vonage systems the biggest threat is eliminated. 500 minute plan customers may be impacted if they and the hacker combined used more than 500 minutes.

So, in summation, the risk to the user is loss of incoming calls for the period the hacker's router is active, and the cost of toll calls (international calls) and the cost of calls above the 500 minute limit for limited plan users.

Phone impersonation

Another risk may come from someone who is attempting to impersonate you by using your phone. For example, if they stole a credit card from your mailbox but needed your phone to activate it, they could use this technique to place the call. This type of phone impersonation is more insidious than simple caller id spoofing because it would also provide the correct ANI information (used by toll free numbers to identify callers for example). However, the actual usefulness of this is limited. It is very simple to spoof calls to have your caller id through other mechanisms, so the need for this attack is extremely limited.

How could you be vulnerable?

A hacker could randomly attempt to spoof MAC addresses. It is likely that many of the Vonage addresses are in series so knowing a single MAC address would allow a hacker to simply add 1 to the number until he found an active line. Alternatively the hacker could go to the store and record numbers from packages and wait until the routers were activated. Finally, if the hacker knew your MAC address, which may be possible if he has access to your network, he could specifically target you.

Could this be fixed?

Linksys/Vonage could resolve this issue with a specific firmware upgrade. The could prevent the user from altering the MAC address sent by the router. A better solution would be to allow the user to specify a pass phrase (your Vonage account password perhaps) that was sent encrypted to the Vonage servers when your router attempted to download the configuration. This would prevent third parties without access to the pass phrase from cloning your device.

They could also allow you to lock your configuration file. Specifying that only updates could be received unless you permitted a one time download via the web site or a call to customer service. This would be required in the event of a factory reset for example.

What action can you take to protect yourself?

If you are a new user you could avoid this equipment. The news summary did not indicate the Motorola equipment was also vulnerable.

If you are an existing user with this equipment you could replace the equipment at your own cost. I seriously doubt either Vonage or Linksys would reimburse you. You could, I think, change the MAC address the device uses on your local network. I believe the Linksys devices allow you to spoof MAC addresses to fool cable modems. This spoofed MAC address is probably not used for your Vonage configuration. Therefore the MAC address visible on your LAN would be different than the one sent to Vonage. The one sent to Vonage could still be captured, but it would be harder. To make this effective you would want to use a real MAC address from a different Linksys router that was not on your network. This would still leave you open to a random attack, but less open to a targeted attack.

In my opinion this issue is not serious enough to warrant a consumer response in the majority of cases. It is a security flaw that Vonage should be concerned about. However, it is important to realize that credit card companies expect a certain level of identity theft, this is a detriment to credit card users who are affected by credit card theft. I would expect Vonage and Linksys to ignore this issue and simply expect a minimal level of fraud.

Read The Full Thread:

VoIP hijacking possibility

Partial excerpt from ABC news:
ahmagad... so Scary... wat can a custOmer do on their part? NADA? :( i
We've touched on the questionable choice Vonage/Linksys (actually Sipura/Motorola
Here is the abstract of Arias Hung's talk:
Other than the fact that this was talked about at Defcon, this really isn't news.
Ethereal and Cain require you to have access to the target's network. Ethereal
I was hoping to discuss this matter without posting a virtual "how-to-guide"
Therefore, the basic questions remain. If I have one of these Linksys devices
No need to alter the MAC, far more useful (if not as immediate) to get the config

scerruti posted "What is a customer's risk? The highest risk comes to businesses who would" on 08/06/2006

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