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

Vulnerability scoring using CVSS


Vulnerability scoring is indeed a very subjective matter. It depends on the context and the expertise of the person scoring the vulnerability. Hence, in the absence of any standard system, scoring the same vulnerability can differ from person to person.

CVSS is a standard system for scoring vulnerabilities. It takes into account several different parameters before concluding the final score. Using CVSS has the following benefits:

  • It provides standardized and consistent vulnerability scores
  • It provides an open framework for vulnerability scoring, making the individual characteristics of the score transparent
  • CVSS facilitates risk prioritization

For simplification purposes, CVSS metrics are categorized into various groups, as shown in the following diagram:

We'll go through each of the metric categories in brief in the section ahead.

 

Base metric group

The base metric group defines some trivial characteristics of a given vulnerability which are constant over time and...