The researchers who disclosed the aLTEr attack last year (David Rupprecht, Thorsten Holz, and Christina Pöpper), have found new ways to exploit the lack of integrity protection on the 4G/5G user plane in a new attack called Imp4Gt. Whereas the aLTEr attack only allowed an attacker to manipulate known small packets like DNS messages [1], the new attack is more powerful and opens up a greater range of attack possibilities. How it works? As in the case of aLTEr, the Imp4Gt attack requires the attacker to act as a man-in-the-middle radio relay between the target user and the real network…
Article Link: https://www.andreafortuna.org/2020/01/17/imp4gt-impersonation-attacks-in-4g-networks/