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首页> 外文会议>IEEE Conference on Communications and Network Security >Cascading denial of service attacks on Wi-Fi networks
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Cascading denial of service attacks on Wi-Fi networks

机译：Wi-Fi网络上的级联拒绝服务攻击

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摘要

We unveil the existence of a vulnerability in Wi-Fi, which allows an adversary to remotely launch a Denial-of-Service (DoS) attack that propagates both in time and space. This vulnerability stems from a coupling effect induced by hidden nodes. Cascading DoS attacks can congest an entire network and do not require the adversary to violate any protocol. We demonstrate the feasibility of such attacks through experiments with real Wi-Fi cards, extensive ns-3 simulations, and theoretical analysis. The simulations show that the attack is effective both in networks operating under fixed and varying bit rates, as well as ad hoc and infrastructure modes. To gain insight into the root-causes of the attack, we model the network as a dynamical system and analyze its limiting behavior. The model predicts that a phase transition (and hence a cascading attack) is possible when the retry limit parameter of Wi-Fi is greater or equal to 7, and characterizes the phase transition region in terms of the system parameters.
机译：我们揭示了Wi-Fi中存在的漏洞，该漏洞使攻击者可以远程发起拒绝服务（DoS）攻击，该攻击会在时间和空间上传播。此漏洞源自隐藏节点引起的耦合效应。级联的DoS攻击可能会使整个网络拥塞，并且不需要对手违反任何协议。通过真实的Wi-Fi卡实验，大量的ns-3模拟和理论分析，我们证明了此类攻击的可行性。仿真表明，该攻击在以固定和可变比特率运行的网络以及临时模式和基础架构模式下均有效。为了深入了解攻击的根本原因，我们将网络建模为动态系统，并分析其限制行为。该模型预测，当Wi-Fi的重试限制参数大于或等于7时，可能会发生相变（从而导致级联攻击），并根据系统参数来表征相变区域。

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