Book Image

Mastering Defensive Security

By : Cesar Bravo
Book Image

Mastering Defensive Security

By: Cesar Bravo

Overview of this book

Every organization has its own data and digital assets that need to be protected against an ever-growing threat landscape that compromises the availability, integrity, and confidentiality of crucial data. Therefore, it is important to train professionals in the latest defensive security skills and tools to secure them. Mastering Defensive Security provides you with in-depth knowledge of the latest cybersecurity threats along with the best tools and techniques needed to keep your infrastructure secure. The book begins by establishing a strong foundation of cybersecurity concepts and advances to explore the latest security technologies such as Wireshark, Damn Vulnerable Web App (DVWA), Burp Suite, OpenVAS, and Nmap, hardware threats such as a weaponized Raspberry Pi, and hardening techniques for Unix, Windows, web applications, and cloud infrastructures. As you make progress through the chapters, you'll get to grips with several advanced techniques such as malware analysis, security automation, computer forensics, and vulnerability assessment, which will help you to leverage pentesting for security. By the end of this book, you'll have become familiar with creating your own defensive security tools using IoT devices and developed advanced defensive security skills.
Table of Contents (23 chapters)
Section 1: Mastering Defensive Security Concepts
Section 2: Applying Defensive Security
Section 3: Deep Dive into Defensive Security

Creating a patching strategy

How many times have you heard, "This attack could be prevented if the systems were properly patched"? And the cost of those attacks was between millions of dollars to even bankruptcy, so here, the question is: Why is this still happening?

Well, the answer is because patching is not as simple as it sounds.

The complexity of patching

Let´s take a look at the most common complexity factors associated with patching.

Legacy systems

Almost all companies have a degree of legacy systems in production. Most of the time, this is because some applications were designed to run only on a specific OS, and migrating it to a supported OS may cause compatibility issues, so companies decided just to accept the risk.

The problem is that in those cases, you may have some unsupported OSes (or even apps, services, and protocols) that bring additional risks to your infrastructure.

The recommendations to patch legacy systems are outlined here...