Malware via VOIP?

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A friend was trying to phone me at home from his office the other day and kept getting a “the number you have reached is not in service” recording. He then called me (successfully) on his cell. Odd, we thought. This happened a second time, and he was told by the network admin people where he works that they are blocking calls to VOIP lines, which is what we happen to use at home, because their network had been attacked via VOIP. It seems that you can only call landlines or cell phones from their system.

I’ve never heard of such a thing. I’m not at all a tech person, but I suppose it might be possible to mount an online attack via the VOIP box that’s plugged into our router at home.

Anybody here know more about this sort of thing?

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There are plenty of methods of attack – see this page: http://blog.voipinnovations.com/blog/6-common-ways-to-suffer-a-voip-attack
Blocking calls to VOIP lines is probably overkill and will eventually come back to bite them – you already have an issue.

cheers, Paul

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There are plenty of methods of attack – see this page: http://blog.voipinnovations.com/blog/6-common-ways-to-suffer-a-voip-attack
Blocking calls to VOIP lines is probably overkill and will eventually come back to bite them – you already have an issue.

cheers, Paul

It seems to me, from what the author said, that VOIP vulnerabilities exist primarily when a company uses VOIP phones on their network, not when someone outside of the company has a VOIP phone. In other words, the intruder hacks his way onto the company network via a VOIP phone on the company network. If the VOIP phone is not on the company network, it doesn’t present much of a risk to the company’s network.

Group "L" (Linux Mint)
with Windows 10 running in a remote session on my file server

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Paul
Am I wrong again or do those particular attack vectors all concern VOIP networks and not incoming calls FROM a VOIP source?

:cheers:

Just because you don't know where you are going doesn't mean any road will get you there.

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What I said :rolleyes:

:cheers:

Just because you don't know where you are going doesn't mean any road will get you there.

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What I said :rolleyes:

:cheers:

Sometimes something is staring me in the face, and I don’t see it!

Group "L" (Linux Mint)
with Windows 10 running in a remote session on my file server

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There are also problems with external clients via DNS poisoning, but that only results in outgoing calls ending up in the wrong place.

cheers, Paul

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