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Demonstrated LLC-layer attack and defense strategies for wireless communication systems

机译：显示无线通信系统的LLC层攻击和防御策略

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In this work we demonstrate an over-the-air capability to exploit software weaknesses in the signal processing code implementing the physical and link layers of the OSI stack. Our test bed includes multiple nodes leveraging both GNU Radio and the Universal Software Radio Peripheral to demonstrate these attacks and corresponding defensive strategies. More specifically, we examine two duplex modem implementations, continuous wave and OFDM, and a link layer framing protocol vulnerable to buffer overflow attacks. We also discuss possible attacks against the network layer and above by exploiting a waveform utilizing the GNU Radio tunnel/tap block, which allows the waveform to directly interact with the Linux kernel's network stack. Lastly, we consider several different defensive countermeasures, both active and passive, for detecting vulnerabilities in the waveform implementation and also detecting malicious activity in the system. These mitigation strategies should be used to protect communications systems from succumbing to similar classes of attacks.
机译：在这项工作中，我们展示了在实现OSI堆栈的物理和链接层的信号处理代码中利用软件弱点的超空气能力。我们的测试床包括利用GNU无线电和通用软件无线电外围设备的多个节点来展示这些攻击和相应的防御策略。更具体地，我们检查两个双工调制解调器实现，连续波和OFDM，以及易受缓冲区溢出攻击的链路层帧协议。我们还通过利用GNU无线电隧道/抽头块利用波形来讨论对网络层和上面的可能攻击，这允许波形直接与Linux内核网络堆栈交互。最后，我们考虑了几种不同的防御性对策，无论是主动和被动的，都是为了检测波形实现中的漏洞以及检测系统中的恶意活动。这些缓解策略应用于保护通信系统免于屈服于类似的攻击类别。

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