It can be used to send and accept commands on any carrier network globally. It does not matter where the hub is positioned. This explains why the black market is overpopulated by illicit merchants offering ‘Connection-as-a-Service’ to such hubs.ĤG is just beginning to become the norm, so why do we need 5G? – /t9ZR5neEcN Some countries easily issue carrier licenses, which in turn, enable anyone to legitimately set up the hub and interconnect it to a transport node. The bad news about it is lax regulations on purchase of such network appliances. One would need a special device – a SS7 hub. The good news is: no, it’s not possible to connect to any carrier network from a random computer over the Internet. However, the situation changed as soon as the procedure of processing SS7 commands over IP was introduced in 2000, essentially exposing the SS7 layer to outside access. SS7map: worldwide map of SS7 attack surface per country Reddit: #ss7map #31C3 The reason is very simple: as presupposed by those who elaborated on the protocol 40 years ago, in SS7, the signalling layer is separated from the voice layer, and, consequently, no one apart from the staff at the phone switch would be able to access this channel.Įven if someone would, there was no practical use in it: no commands, except those telling to connect to a subscriber, were transmitted through the network, so there was no need to think about faux packets being transported across the layer.

The system would process any command it would get regardless of the source. In other words, the era of the first electronic telephone switches.Īmazingly, SS7 does not employ the basic means of protection: the traffic is not encrypted and the equipment is unable to distinguish between legitimate and rogue commands. The compromise is based on the attack on SS7 – a signalling system used by cellular networks and developed back in 1970s. Besides, carriers have no practical means of protecting against this type of attack.

It requires neither costly radio scanners nor PC powerhouses and is available to virtually anyone. It was last year when a new method of attack on cellular networks was discovered.

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