educationNov 12, 202512:42pending
Course 1 - BurpSuite Bug Bounty Web Hacking from Scratch | Episode 11: Injection and Directory Path Traversal Attacks.
About this episode
In this lesson, you’ll learn about:
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- 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.config
- Linux: /etc/passwd
- Consequences:
- 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.
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https://linktr.ee/cybercode_academy
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