Discovering emergency call pitfalls for cellular networks with formal methods
Discovering emergency call pitfalls for cellular networks with formal methods
复制标题
使用形式化方法发现蜂窝网络的紧急呼叫陷阱
DOI:
10.1145/3458864.3466625
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Zhou, Hai
中科院分区:
文献类型:
--
作者:
Hou, Kaiyu;Li, You;Yu, Yinbo;Chen, Yan;Zhou, Hai
Availability and security problems in cellular emergency call systems can cost people their lives, yet this topic has not been thoroughly researched. Based on our proposedSeed-Assisted Specificationmethod, we start to investigate this topic by looking closely into one emergency call failure case in China. Using what we learned from the case as prior knowledge, we build a formal model of emergency call systems with proper granularity. By running model checking, four public-unaware scenarios where emergency calls cannot be correctly routed are discovered. Additionally, we extract configurations of two major U.S. carriers and incorporate them as model constraints into the model. Based on the augmented model, we find two new attacks leveraging the privileges of emergency calls. Finally, we present a solution with marginal overhead to resolve issues we can foresee.
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IEEE/ACM Transactions on Networking
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