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Introduction:
Bug bounty programs offer cybersecurity professionals and ethical hackers the opportunity to identify vulnerabilities in systems and earn rewards for their discoveries. This guide covers foundational techniques, commands, and tools used in bug bounty hunting, from reconnaissance to exploitation.
Learning Objectives:
- Understand core bug bounty methodologies and tools.
- Learn essential Linux and Windows commands for vulnerability assessment.
- Explore API security and cloud hardening techniques.
1. Reconnaissance with Subdomain Enumeration
Command:
subfinder -d example.com -o subdomains.txt
Step-by-Step Guide:
- Install SubFinder:
go install -v github.com/projectdiscovery/subfinder/v2/cmd/subfinder@latest
- Run the command to discover subdomains of
example.com. - Output is saved to `subdomains.txt` for further analysis.
2. Directory Brute-Forcing with FFUF
Command:
ffuf -w /path/to/wordlist.txt -u https://example.com/FUZZ
Step-by-Step Guide:
1. Install FFUF:
go install github.com/ffuf/ffuf@latest
2. Replace `/path/to/wordlist.txt` with a wordlist (e.g., `common.txt` from SecLists).
3. FFUF tests paths like `https://example.com/admin`, `https://example.com/login`, etc.
3. API Security Testing with Postman
Command (Postman Collection Snippet):
{
"request": {
"method": "GET",
"header": [],
"url": "https://api.example.com/user?id=1"
}
}
Step-by-Step Guide:
1. Import this JSON into Postman.
- Test for IDOR (Insecure Direct Object Reference) by changing `id=1` to
id=2.
3. Check for unauthorized data access.
4. Cloud Hardening: AWS S3 Bucket Permissions
Command:
aws s3api get-bucket-acl --bucket vulnerable-bucket
Step-by-Step Guide:
1. Install AWS CLI and configure credentials.
- Run the command to check permissions on an S3 bucket.
- Look for misconfigurations like `”Permission”: “FULL_CONTROL”` for public users.
5. Exploiting SQL Injection with SQLmap
Command:
sqlmap -u "https://example.com/login?user=1" --dbs
Step-by-Step Guide:
1. Install SQLmap:
pip install sqlmap
2. The command tests for SQL injection and extracts database names (--dbs).
3. Use `–dump` to retrieve table data if vulnerable.
6. Windows Privilege Escalation Check
Command (PowerShell):
whoami /priv
Step-by-Step Guide:
1. Run in PowerShell to list user privileges.
- Look for `SeImpersonatePrivilege` or `SeDebugPrivilege` for potential escalation paths.
- Mitigating XSS with Content Security Policy (CSP)
Code Snippet (HTTP Header):
Content-Security-Policy: default-src 'self'; script-src 'none'
Step-by-Step Guide:
- Add this header to web server configurations (e.g., Apache/Nginx).
- Prevents inline scripts and external JavaScript execution, reducing XSS risks.
What Undercode Say:
- Key Takeaway 1: Bug bounty hunting requires a mix of automation (tools like FFUF/SQLmap) and manual testing (API/cloud checks).
- Key Takeaway 2: Always validate findings ethically and report responsibly to avoid legal repercussions.
Analysis:
The rise of bug bounty programs reflects the growing demand for proactive security. As AI-driven tools automate vulnerability detection, hunters must adapt by mastering advanced exploitation techniques and cloud security. Future programs may integrate AI for real-time bug triaging, but human ingenuity remains irreplaceable for logic flaws and novel attack vectors.
Prediction:
By 2026, bug bounty platforms will leverage AI to auto-validate submissions, reducing response times. However, ethical hackers with deep domain expertise (e.g., IoT, blockchain) will dominate high-reward programs.
For the course mentioned in the post, visit: Introduction to Bug Bounty.
IT/Security Reporter URL:
Reported By: Red Team – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
