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Muhammad Suropati, a cybersecurity enthusiast and penetration tester, recently shared his bug bounty achievements from February to April, earning over $2000 by uncovering critical vulnerabilities. His findings included:
– 5 IDOR (Insecure Direct Object Reference) vulnerabilities
– 3 Privilege Escalation flaws (2 via POST method, 1 via GET method)
– 2 Business Logic Errors
You Should Know:
1. IDOR (Insecure Direct Object Reference)
IDOR occurs when an application exposes internal objects (e.g., user IDs, files) without proper authorization checks.
Example Exploitation:
curl -X GET "https://target.com/api/user?id=123" -H "Authorization: Bearer TOKEN"
Mitigation:
- Implement proper access controls (e.g., role-based checks).
- Use UUIDs instead of sequential IDs.
2. Privilege Escalation (POST & GET Methods)
Privilege escalation allows attackers to gain higher-level permissions.
Testing POST-Based Escalation:
curl -X POST "https://target.com/admin/grant" -d '{"user":"attacker","role":"admin"}' -H "Cookie: SESSION=LEAKED_COOKIE"
Testing GET-Based Escalation:
curl -X GET "https://target.com/admin/add?user=attacker&role=admin"
Mitigation:
- Enforce strict session validation.
- Apply the principle of least privilege.
3. Business Logic Errors
These flaws exploit application workflows (e.g., price manipulation, bypassing restrictions).
Example (Cart Price Manipulation):
curl -X POST "https://target.com/checkout" -d '{"price":0.01,"item":"premium_product"}'
Mitigation:
- Server-side validation of business rules.
- Rate-limiting sensitive actions.
What Undercode Say:
Bug bounty hunting requires persistence and deep technical knowledge. Key takeaways:
– Automate recon with tools like Burp Suite, OWASP ZAP, and Nmap.
– Understand HTTP methods (GET, POST, PUT, DELETE) for exploitation.
– Practice Linux commands for recon:
nmap -sV target.com Service detection sqlmap -u "https://target.com/search?id=1" --dbs SQLi testing ffuf -u https://target.com/FUZZ -w wordlist.txt Directory brute-forcing
– Windows commands for network analysis:
netstat -ano Check open ports whoami /priv Check user privileges
– Always document findings for reports (e.g., screenshots, curl commands, PoC code).
Expected Output:
A well-structured bug report with:
1. Vulnerability Type (e.g., IDOR).
2. Steps to Reproduce (with commands).
3. Impact Assessment (e.g., “Allows admin access”).
4. Suggested Fix (e.g., “Add role validation”).
Keep hacking ethically! 🚀
References:
Reported By: Muhammad Suropati – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
