Marjan keramati - Semnan University, Semnan, Iran

Currently, because of exponential growth rate of vulnerabilities, one of the most essential requirements for IT managers is to improve network security level by eliminating vulnerabilities that are most hazardous to the network. Achieving this goal requires ranking vulnerabilities based on their peril to the network. Today this target has become possible by introducing open standards such as Common Vulnerability Scoring System (CVSS) for ranking vulnerabilities. But CVSS suffers from basic and serious problems that limit the use of it for efficient vulnerability scoring. One constraint is its limited diversity of scores that a small set of discrete values are used for ranking large amount of vulnerabilities. Another challenge is that, CVSS does not score features of the vulnerability that changes over time such as emerging mitigation techniques for it. By considering these limitations, In this paper we developed a Vulnerability Scoring System that assess the risk of each known vulnerability based on its intrinsic and temporal features with suitable diversity in comparison to CVSS. In this paper we also had a novel improvement in comparison to Impact parameter of CVSS for measuring the effect of vulnerability exploiting on security parameters of the network.

Risk, Vulnerability, Impact, CVSS, CWE