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About this paper
Dong Hyeok Kim, Xin Zhe Khooi, Hocheol Nam, Seungjin Baek, Mun Choon Chan, CheolJun Park, Min Suk Kang
Buckler lets cellular operators install bounded, temporary rules to intervene in RAN signaling before vulnerable processing. Hooks at standard message boundaries let handlers drop, modify, or release messages. In an identifier-replay test, packet traffic continued after intervention. The authors construct hotfixes for 20 of 43 RAN-intervenable attacks (46.5%), a lower bound; evaluations cover two open-source stacks in LTE, not native 5G.
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