Estimating ToE Risk Level using CVSS


Houmb, S.H. and Nunes Leal Franqueira, V. (2009) Estimating ToE Risk Level using CVSS. In: Proceedings of the Fourth International Conference on Availability, Reliability and Security (ARES 2009 – The International Dependability Conference), 16-19 March 2009, Fukuoka, Japan (pp. pp. 718-725). (In Press)

open access
Abstract:Security management is about calculated risk and requires continuous evaluation to ensure cost, time and resource
effectiveness. Parts of which is to make future-oriented, cost-benefit investments in security. Security investments must adhere to healthy business principles where both security and financial aspects play an important role. Information on the current and potential risk level is essential to successfully trade-off security and financial aspects.

Risk level is the combination of the frequency and impact
of a potential unwanted event, often referred to as a security threat or misuse. The paper presents a risk level estimation model that derives risk level as a conditional probability over frequency and impact estimates. The frequency and impact estimates are derived from a set of attributes specified in the Common Vulnerability Scoring System (CVSS). The model works on the level of vulnerabilities (just as the CVSS) and is able to compose vulnerabilities into service levels. The service
levels define the potential risk levels and are modelled as a Markov process, which are then used to predict the risk level at a particular time.
Item Type:Conference or Workshop Item
Additional information:The Proceedings is not printed yet, but the camera-ready version of the paper is uploaded for print.
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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