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Introduction:
Bug bounty hunting is a high-demand skill in cybersecurity, offering lucrative rewards for discovering vulnerabilities. This article dives into advanced techniques, tools, and commands to help you avoid duplicates and uncover critical security flaws like a pro.
Learning Objectives:
- Learn how to identify and exploit real-world vulnerabilities.
- Master essential Linux and Windows commands for bug hunting.
- Understand API security and cloud hardening techniques.
1. Essential Linux Commands for Reconnaissance
Command:
subfinder -d example.com -o subdomains.txt
What It Does:
Subfinder is a subdomain discovery tool that scrapes multiple sources (SSL certificates, search engines) to find subdomains.
Step-by-Step Guide:
1. Install Subfinder:
go install -v github.com/projectdiscovery/subfinder/v2/cmd/subfinder@latest
2. Run the command above to scan `example.com`.
3. Review `subdomains.txt` for potential targets.
2. Windows PowerShell for Security Testing
Command:
Test-NetConnection -ComputerName target.com -Port 443
What It Does:
Checks if a remote port (e.g., 443 for HTTPS) is open, helping identify live services.
Step-by-Step Guide:
1. Open PowerShell as Administrator.
2. Run the command to test connectivity.
- Analyze results for open ports that may expose vulnerabilities.
3. Exploiting SQL Injection with SQLmap
Command:
sqlmap -u "https://example.com/login?id=1" --dbs
What It Does:
SQLmap automates SQL injection attacks to extract database information.
Step-by-Step Guide:
1. Install SQLmap:
git clone --depth 1 https://github.com/sqlmapproject/sqlmap.git
2. Run the command to list databases (--dbs flag).
3. Use `–dump` to extract table data if vulnerable.
- API Security Testing with Postman & Burp Suite
Command/Tool:
- Postman: Send crafted API requests to test for IDOR, SSRF.
- Burp Suite: Intercept and manipulate API calls.
Step-by-Step Guide:
1. Capture API requests using Burp Suite Proxy.
- Modify parameters (e.g., `user_id=123` →
user_id=456) to test access control.
3. Check for unauthorized data exposure.
5. Cloud Hardening: AWS S3 Bucket Security
Command:
aws s3api get-bucket-acl --bucket vulnerable-bucket
What It Does:
Checks permissions on an AWS S3 bucket to identify misconfigurations.
Step-by-Step Guide:
1. Install AWS CLI and configure credentials.
2. Run the command to audit bucket permissions.
3. Restrict public access if needed using:
aws s3api put-bucket-acl --bucket my-bucket --acl private
6. Vulnerability Mitigation: Patch Management in Linux
Command:
sudo apt update && sudo apt upgrade -y
What It Does:
Updates all installed packages to patch known vulnerabilities.
Step-by-Step Guide:
1. Run the command on Debian/Ubuntu systems.
2. For CentOS/RHEL, use:
sudo yum update -y
3. Schedule regular updates via cron jobs.
7. Advanced Exploit: Cross-Site Scripting (XSS) Payload
Payload:
<script>alert(document.cookie)</script>
What It Does:
Tests for stored or reflected XSS vulnerabilities.
Step-by-Step Guide:
- Inject the payload into input fields (search, comments).
2. If executed, the site is vulnerable—report responsibly.
What Undercode Say:
- Key Takeaway 1: Automation tools (SQLmap, Subfinder) save time but require ethical use.
- Key Takeaway 2: API and cloud misconfigurations are low-hanging fruit for bug hunters.
Analysis:
The rise of API-driven applications and cloud services has expanded attack surfaces. Bug hunters must focus on automation, secure coding flaws, and cloud security gaps. Continuous learning (via platforms like YouTube, Hack The Box) is crucial to stay ahead.
Prediction:
As AI-powered security tools evolve, bug bounty programs will demand more sophisticated hunters. Expect AI-driven vulnerability scanners to assist—but not replace—human creativity in exploit discovery.
Ready to level up? Check out Deepak Saini’s Bug Bounty Channel for hands-on tutorials! 🚀
🎯Let’s Practice For Free:
IT/Security Reporter URL:
Reported By: Deepak Saini – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
