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Publication Citation: k-Zero Day Safety: Measuring the Security Risk of Networks Against Unknown Attacks

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Author(s): Lingyu Wang; Sushil Jajodia; Anoop Singhal; Steven Noel;
Title: k-Zero Day Safety: Measuring the Security Risk of Networks Against Unknown Attacks
Published: December 10, 2010
Abstract: The security risk of a network against unknown zero day attacks has been considered as something unmeasurable since software flaws are less predictable than hardware faults and the process of finding such flaws and developing exploits seems to be chaotic [10]. In this paper, we propose a novel security metric, k-zero day safety, based on the number of unknown zero day vulnerabilities. That is, the metric simply counts how many unknown vulnerabilities would be required for compromising a network asset, regardless of what vulnerabilities those might be. We formally define the metric based on an abstract model of networks and attacks. We then devise algorithms for computing the metric. Finally, we show the metric can quantify many existing practices in hardening a network.
Conference: 15th European Symposium on Research in Computer Security (ESORICS 2010)
Proceedings: Computer Security ‹ ESORICS 2010
Volume: 6345
Pages: pp. 573 - 587
Location: Athens, -1
Dates: September 20-22, 2010
Keywords: attack graphs; network security; security metrics
Research Areas: Information Technology, Computer Security, Cybersecurity
DOI: http://dx.doi.org/10.1007/978-3-642-15497-3_35  (Note: May link to a non-U.S. Government webpage)
PDF version: PDF Document Click here to retrieve PDF version of paper (329KB)