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arXiv · 1109.4404

Mitigation of Random Query String DoS via Gossip

Stefano Ferretti·Vittorio Ghini
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Abstract

This paper presents a mitigation scheme to cope with the random query string Denial of Service (DoS) attack, which is based on a vulnerability of current Content Delivery Networks (CDNs). The attack exploits the fact that edge servers composing a CDN, receiving an HTTP request for a resource with an appended random query string never saw before, ask the origin server for a (novel) copy of the resource. Such characteristics can be employed to take an attack against the origin server by exploiting edge servers. Our strategy adopts a simple gossip protocol executed by edge servers to detect the attack. Based on such a detection, countermeasures can be taken to protect the origin server and the CDN against the attack. We provide simulation results that show the viability of our approach.

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Stefano Ferretti, Vittorio Ghini. 2012-02-23. Mitigation of Random Query String DoS via Gossip. https://arxiv.org/abs/1109.4404

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