Book Image

Securing Network Infrastructure

By : Sairam Jetty, Sagar Rahalkar
Book Image

Securing Network Infrastructure

By: Sairam Jetty, Sagar Rahalkar

Overview of this book

Digitization drives technology today, which is why it’s so important for organizations to design security mechanisms for their network infrastructures. Analyzing vulnerabilities is one of the best ways to secure your network infrastructure. This Learning Path begins by introducing you to the various concepts of network security assessment, workflows, and architectures. You will learn to employ open source tools to perform both active and passive network scanning and use these results to analyze and design a threat model for network security. With a firm understanding of the basics, you will then explore how to use Nessus and Nmap to scan your network for vulnerabilities and open ports and gain back door entry into a network. As you progress through the chapters, you will gain insights into how to carry out various key scanning tasks, including firewall detection, OS detection, and access management to detect vulnerabilities in your network. By the end of this Learning Path, you will be familiar with the tools you need for network scanning and techniques for vulnerability scanning and network protection. This Learning Path includes content from the following Packt books: •Network Scanning Cookbook by Sairam Jetty •Network Vulnerability Assessment by Sagar Rahalkar
Table of Contents (28 chapters)
Title Page
Copyright and Credits
About Packt
Contributors
Preface
Index

CVSS calculator


In the previous sections, we looked at various categories of metrics that are taken into consideration for calculating the final CVSS score. It might appear overwhelming to consider so many values in calculating the score. However, this task is made easy by using the online CVSS calculator. It can be accessed at https://www.first.org/cvss/calculator/3.0.

The online CVSS calculator has got all the required parameters, and you need to select the right ones based on your environment and vulnerability context. Once done, the final score is automatically populated.

The following screenshot shows the CVSS calculator before selecting values for any of the parameters:

Consider a vulnerability that could be remotely exploited over the network, is highly complex to execute, requires high account privileges, and requires some kind of interaction from a target user while the impact on confidentiality, integrity, and availability is low. In such a case, the CVSS score would be 3.9 and rated...