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arXiv · 1807.08026

TCP SYN Cookie Vulnerability

Dakshil Shah·Varshali Kumar
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Abstract

TCP SYN Cookies were implemented to mitigate against DoS attacks. It ensured that the server did not have to store any information for half-open connections. A SYN cookie contains all information required by the server to know the request is valid. However, the usage of these cookies introduces a vulnerability that allows an attacker to guess the initial sequence number and use that to spoof a connection or plant false logs.

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Dakshil Shah, Varshali Kumar. 2018-07-20. TCP SYN Cookie Vulnerability. https://arxiv.org/abs/1807.08026

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