Course 1 - BurpSuite Bug Bounty Web Hacking from Scratch | Episode 11: Injection and Directory Path Traversal Attacks.

In this lesson, you’ll learn about:Critical Web Security Vulnerabilities — Overview: Focus on Injection Attacks and Directory Path Traversal Attacks, two high-risk categories in web applications.Injection Attacks — definition & mechanism:Occur when untrusted input is sent to an interpreter (SQL, OS commands, HTML, CSS, or JavaScript), altering program execution.Can lead to data theft, data loss, denial of service, or full system compromise.Types include:Client-side: Cross-Site Scripting (XSS), HTML injection, CSS injection.Server-side: SQL injection, command injection, CRLF injection.Requires input/output interaction with the web application or database.Directory Path Traversal (Path Traversal) — definition & mechanism:HTTP attack allowing attackers to bypass web server restrictions and access files outside the designated root directory.Exploits file path parameters by inserting traversal sequences like ../ to move up directories.Targets include sensitive files:Windows: web.configLinux: /etc/passwdConsequences:Unauthorized access to critical files, application configuration, and sensitive system data.Potential for executing arbitrary commands depending on server privileges.Detection & Demonstration:Attackers test parameters by adding ../ sequences and observing responses.Successful access indicates improper input validation and insufficient access controls.Mitigation & Best Practices:Keep web server software updated with latest patches.Validate and sanitize all user inputs, filtering out meta-characters (../, %2e%2e/, etc.).Restrict server environment to only necessary data and remove unused files.Implement proper Access Control Lists (ACLs) and enforce directory confinement.Key takeaway:Protecting against injection and path traversal attacks requires both input validation and secure configuration of server directories and application logic.You can listen and download our episodes for free on more than 10 different platforms:https://linktr.ee/cybercode_academy