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Bug bounty hunting can be thrilling, but encountering internal duplicates can be frustrating. Here’s a deep dive into handling such scenarios, along with practical commands and techniques to improve your approach.
You Should Know:
1. Reconnaissance & Enumeration
- Use Nmap to scan internal networks:
nmap -sV -p- 192.168.1.0/24 -oN internal_scan.txt
- Check for duplicate subdomains with Amass:
amass enum -d target.com -config config.ini -o subdomains.txt
2. Exploiting Duplicate Bugs
- If a bug is marked as a duplicate, verify if it’s exploitable in a different context:
curl -X POST "http://internal.target.com/api/v1/endpoint" -H "Authorization: Bearer TOKEN" --data '{"param":"payload"}' - Use Burp Suite to replay requests with modified headers.
3. Automating Bypass Attempts
- Run ffuf for directory brute-forcing:
ffuf -w wordlist.txt -u http://internal.target.com/FUZZ -mc 200,403
- Check for misconfigured JWT tokens with jwt_tool:
python3 jwt_tool.py <JWT_TOKEN> -T -hc "Authorization"
4. Post-Exploitation
- Extract sensitive files from Linux systems:
find / -name ".conf" -type f -exec grep -l "password" {} \; - Dump Windows credentials with Mimikatz (if inside a network):
sekurlsa::logonpasswords
5. Avoiding Duplicate Reports
- Use Wayback Machine to find historical endpoints:
curl "http://web.archive.org/cdx/search/cdx?url=.target.com/&output=json" | jq
- Check for CVE exploits related to the target software:
searchsploit "Apache 2.4.50"
What Undercode Say:
Internal duplicates are common, but persistence pays off. Always:
– Document variations of the same bug.
– Test different attack vectors (headers, parameters, API routes).
– Leverage automation (Nmap, Burp, ffuf) to uncover hidden flaws.
– Stay updated on new exploits (CVE databases, GitHub repos).
Prediction:
As bug bounty programs grow, automated duplicate detection will improve, but creative hackers will always find edge cases. Expect more AI-driven triaging, but also more sophisticated evasion techniques.
Expected Output:
- A structured bug report with PoC.
- Verified exploit code/commands.
- Alternative attack paths for duplicates.
(No relevant URLs extracted from the original post.)
References:
Reported By: Sandeshgg Bugbounty – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
