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Complete Write-up on Google Bug Bounty
Jebarson Immanuel earned a $500 bounty from Google by discovering a critical bug through meticulous documentation review and a basic port scan. His approach highlights the importance of thorough reconnaissance and understanding system architecture.
You Should Know:
1. Reconnaissance & Documentation Analysis
- Tools:
– `nmap` (Port Scanning)
– `curl` (API Testing)
– `grep` (Documentation Parsing) -
Commands:
Basic Nmap Scan nmap -sV -T4 target.com Extract API Endpoints from Documentation curl -s https://target.com/docs | grep -Eo 'https?://[^"]+'
2. Port Scanning for Hidden Services
-
Common Vulnerable Ports:
Check for Open Ports nmap -p 80,443,8080,8443,22,21 target.com Deep Scan for Uncommon Services nmap -p- -sV --min-rate 1000 target.com
3. Exploiting Misconfigurations
- Example: If an internal API is exposed, test for:
API Enumeration curl -X GET http://target.com/internal-api/v1/users curl -H "Authorization: Bearer TEST" http://target.com/admin
4. Automating with Bash
- Script to Check for Common Bugs:
!/bin/bash target=$1 echo "Scanning $target..." nmap -sV $target | tee scan_results.txt curl -s $target | grep -q "debug=true" && echo "Debug mode exposed!"
What Undercode Say:
Bug hunting isn’t just about advanced exploits—sometimes, the simplest techniques yield the biggest rewards. Key takeaways:
1. Read documentation carefully—many bugs are hidden in plain sight.
2. Port scanning is fundamental—unexpected open ports often lead to vulnerabilities.
3. Automate repetitive tasks—bash scripting speeds up reconnaissance.
4. Test internal endpoints—misconfigured APIs are low-hanging fruit.
Expected Output:
$ ./scan.sh target.com Scanning target.com... PORT STATE SERVICE 80/tcp open http 443/tcp open https 8080/tcp open http-proxy Debug mode exposed!
Prediction:
As APIs and cloud services grow, misconfigurations will remain a top attack vector. Expect more bounty programs to reward documentation-based bugs and automated scanning discoveries.
Relevant Links:
(End of Report)
IT/Security Reporter URL:
Reported By: Jebarson Immanuel – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
