"Despite the dependence and the immeasurable amount of sensitive data flowing through Wi-Fi transmissions, the history of the protocol has been littered with security landmines stemming both from the inherited confidentiality weaknesses of its networking predecessor, Ethernet (it was once possible for anyone on a network to read and modify the traffic sent to anyone else), and the ability for anyone nearby to receive the radio signals Wi-Fi relies on."
"New research shows that behaviors that occur at the very lowest levels of the network stack make encryption-in any form, not just those that have been broken in the past-incapable of providing client isolation, an encryption-enabled protection promised by all router makers, that is intended to block direct communication between two or more connected clients."
"The isolation can effectively be nullified through AirSnitch, the name the researchers gave to a series of attacks that capitalize on the newly discovered weaknesses. Various forms of AirSnitch work across a broad range of routers, including those from Netgear, D-Link, Ubiquity, Cisco, and"
Wi-Fi security has evolved significantly since the protocol's debut in the late 1990s, with billions of devices now connected globally. However, fundamental vulnerabilities persist despite encryption protections. Early public Wi-Fi networks suffered from ARP spoofing attacks enabling traffic interception. Modern routers implement client isolation features intended to prevent direct communication between connected clients. New research reveals that behaviors at the lowest network stack levels undermine encryption effectiveness, making client isolation ineffective across multiple router brands including Netgear, D-Link, Ubiquity, and Cisco. These weaknesses, exploited through attacks called AirSnitch, demonstrate that guest networks may provide less security than users assume.
Read at Ars Technica
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