--- title: "b1d0ws (@b1d0ws) | Hashnode" description: "CyberSecurity Noob. Read the latest articles by b1d0ws on Hashnode." url: "https://hashnode.com/@b1d0ws" --- @b1d0ws # b1d0ws @b1d0ws · Rio Grande do Sul, BR · Joined April 2021 CyberSecurity Noob ### [ReDoS: O Denial of Service que Mora na sua Regex](https://b1d0ws.hashnode.dev/redos-o-denial-of-service-que-mora-na-sua-regex?utm_source=hashnode&utm_medium=feed) Introdução Esses dias descobri que cerca de 5% das vulnerabilidades de segurança em aplicações Node.js são causadas por ReDoS e isso me surpreendeu. Também conhecido como Regular Expression Denial of Service, o ReDoS é um tipo de vulnerabilidade que ... 11 min read · [b1d0ws.hashnode.dev](https://b1d0ws.hashnode.dev/redos-o-denial-of-service-que-mora-na-sua-regex?utm_source=hashnode&utm_medium=feed) [Apr 22, 2025](https://hashnode.com/posts/redos-o-denial-of-service-que-mora-na-sua-regex/68078778aa59fa28fe6ceec9) ### [AppSec Project - Chapter 4, SAST Tools and Containerization](https://b1d0ws.hashnode.dev/appsec-project-chapter-4-sast-tools-and-containerization?utm_source=hashnode&utm_medium=feed) Introduction Hello! Today, we’ll explore testing various SAST tools to evaluate their effectiveness in helping us secure our application. Additionally, we’ll containerize our app and make final adjust 7 min read · [b1d0ws.hashnode.dev](https://b1d0ws.hashnode.dev/appsec-project-chapter-4-sast-tools-and-containerization?utm_source=hashnode&utm_medium=feed) [Nov 19, 2024](https://hashnode.com/posts/appsec-project-chapter-4-sast-tools-and-containerization/673be0d674d16d52bfc73185) ### [AppSec Project - Chapter 3, Enhancing Security](https://b1d0ws.hashnode.dev/appsec-project-chapter-3-enhancing-security?utm_source=hashnode&utm_medium=feed) Introduction In today’s article, we will focus on implementing several enhancements to improve the overall security of our web application. While most of these changes do not address specific vulnerabilities, they play a crucial role in mitigating po... 9 min read · [b1d0ws.hashnode.dev](https://b1d0ws.hashnode.dev/appsec-project-chapter-3-enhancing-security?utm_source=hashnode&utm_medium=feed) [Nov 7, 2024](https://hashnode.com/posts/appsec-project-chapter-3-enhancing-security/672c0d9b650e6d461169d3d6) ### [AppSec Project - Chapter 2, Manually fixing more vulnerabilities](https://b1d0ws.hashnode.dev/appsec-project-chapter-2-manually-fixing-more-vulnerabilities?utm_source=hashnode&utm_medium=feed) Introduction Hello, and welcome to chapter 2 of our AppSec project! If you're not up to speed with what's going on, be sure to start with chapter 1. Today, we'll continue our journey of manually fixing vulnerabilities. Without further delay, let's st... 10 min read · [b1d0ws.hashnode.dev](https://b1d0ws.hashnode.dev/appsec-project-chapter-2-manually-fixing-more-vulnerabilities?utm_source=hashnode&utm_medium=feed) [Oct 29, 2024](https://hashnode.com/posts/appsec-project-chapter-2-manually-fixing-more-vulnerabilities/67210cce56e9e72696382d40) ### [AppSec Project - Chapter 1, Manually fixing vulnerabilities](https://b1d0ws.hashnode.dev/appsec-project-chapter-1-manually-fixing-vulnerabilities?utm_source=hashnode&utm_medium=feed) Introduction Hello, welcome to the b1d0ws appsec project! The idea here is to introduce you, with a few articles, to a process of building, fixing vulnerabilities and integrating a python website with application security. I'm a beginner in this proc... 8 min read · [b1d0ws.hashnode.dev](https://b1d0ws.hashnode.dev/appsec-project-chapter-1-manually-fixing-vulnerabilities?utm_source=hashnode&utm_medium=feed) [Oct 23, 2024](https://hashnode.com/posts/appsec-project-chapter-1-manually-fixing-vulnerabilities/6719434b8c142275d5a42a1f)