- Apr 21, 2017
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https://techxplore.com/news/2019-02-flaws-4g-5g-networks-hackers.html
In an attack the researchers have dubbed "torpedo," adversaries can use this paging message to track a victim's location and then inject fake paging messages and stop calls and texts from coming in. The findings were presented Tuesday at the Network and Distributed Security Symposium in San Diego.
"It doesn't require an experienced hacker to perform this attack," Hussain said. "Anyone with a little knowledge of cellular paging protocols could carry it out."
Torpedo also paves the way for two other attacks: one that allows attackers to obtain a device's international mobile subscriber identity (IMSI) on 4G networks, and another that allows hackers to obtain a victim's "soft identities," such as phone number or Twitter handle, on 4G and 5G networks.
"The IMSI-Cracking attack is a huge blow for 5G because it bypasses the network's new security policies to protect users' IMSIs from exposure," Hussain said.
Torpedo can be carried out via the networks of all four major U.S. cellular companies (AT&T, Verizon, Sprint and T-Mobile), according to the paper.