Feds Finally Decide To Do Something About Years-Old SS7 Spy Holes In Phone Networks
SS7, which was developed in the mid-1970s, can be potentially abused to track people’s phones’ locations; redirect calls and text messages so that info can be intercepted; and spy on users. The Diameter protocol was developed in the late-1990s and includes support for network access and IP mobility in local and roaming calls and messages. It does not, however, encrypt originating IP addresses during transport, which makes it easier for miscreants to carry out network spoofing attacks. “As coverage expands, and more networks and participants are introduced, the opportunity for a bad actor to exploit SS7 and Diameter has increased,” according to the FCC [PDF].
On March 27 the commission asked telecommunications providers to weigh in and detail what they are doing to prevent SS7 and Diameter vulnerabilities from being misused to track consumers’ locations. The FCC has also asked carriers to detail any exploits of the protocols since 2018. The regulator wants to know the date(s) of the incident(s), what happened, which vulnerabilities were exploited and with which techniques, where the location tracking occurred, and — if known — the attacker’s identity. This time frame is significant because in 2018, the Communications Security, Reliability, and Interoperability Council (CSRIC), a federal advisory committee to the FCC, issued several security best practices to prevent network intrusions and unauthorized location tracking. Interested parties have until April 26 to submit comments, and then the FCC has a month to respond.
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