GVM allows for authenticated and unauthenticated vulnerability scanning of individual targets or networks. While many still call it OpenVAS, we will use the new name, GVM. The software began as a fork of Nessus after Nessus changed from open source to closed source. Until recently, OpenVAS used to be its own framework but is now part of the Greenbone Vulnerability Manager (GVM). OpenVAS (Open Vulnerability Assessment Scanner) was a vulnerability scanner managed by Greenbone Networks.
This tool is not included by default on Kali Linux. It can scan individual targets or multiple targets in a network. Nessus offers a wide range of options to customize your scanning, including the intensity of the scan, the types of vulnerabilities to look for, and the ability to schedule a scan for a specific time and date. Tenable advertises Nessus as the number one tool for vulnerability assessment, scanning for over 75,000 CVEs (Common Vulnerabilities and Exposures). Nessus is a vulnerability assessment tool made by Tenable, available as a free version, professional version, and expert version. There are outside repositories that can greatly increase the number of vulnerabilities Nmap can scan for, such as Vulners. Nmap has a powerful scripting engine that includes scanners for a wide range of known vulnerabilities. It comes preinstalled on Kali Linux and is often the first tool penetration testers use to enumerate their target.
It has the ability to discover hosts on a network and provide a wealth of information on them, including the hostname, operating system, open ports, running services and service versions, and more. Short for Network Mapper, Nmap is a free and open-source tool used for network discovery and security auditing. Before we dive into the specifics of each, let’s take a look at an overview of these programs.
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