Service:
alternate
Protocol:
TCPPort:
9512Used for:
Alternative service portWhy It’s Open
Port 9512 is primarily used by FirstClass collaboration software and Sphinx Search daemon. FirstClass is a client-server groupware platform providing email, messaging, and collaborative services, while Sphinx is an open-source full-text search engine commonly used for website search functionality.
Common Risks
- Outdated software vulnerabilities
Legacy FirstClass installations often contain unpatched security issues. - Weak authentication mechanisms
Both services may implement inadequate credential security. - SQL injection in search queries
Sphinx search daemon may process malicious queries leading to data exposure. - Information leakage
Collaboration platforms potentially expose sensitive communications and files. - Unauthorized index access
Improperly secured search indices may reveal data without authentication.
Enumeration & Testing
Service Detection:
nmap -sV -p 9512FirstClass Service Testing:
curl http://:9512 telnet 9512Sphinx Search Testing:
echo "SELECT * FROM index_name" | nc 9512What to Look For
| Checkpoint | What it means |
|---|---|
| Service version | Identify software version and patch level |
| Authentication | Check for default or weak credentials |
| SSL/TLS config | Verify encryption settings if applicable |
| Access controls | Test for proper authorization mechanisms |
Mitigation
- Keep software updated
Apply latest security patches - Strong authentication
Use complex passwords and 2FA - Access restrictions
Limit service to trusted networks - Monitor activity
Log and review service usage - Disable if unused
Remove unnecessary services
TL;DR
- Port 9512 = FirstClass/Sphinx search with collaboration and search daemon vulnerabilities
- Protocol: TCP
- Used for: FirstClass collaboration server and Sphinx search daemon
- Security focus: Legacy collaboration software and search engine security
Known CVEs and Exploits
- CVE-2005-0468 - FirstClass Internet Services buffer overflow vulnerability allowing remote code execution.
- CVE-2011-0484 - Sphinx Search SQL injection vulnerability in search queries.
- CVE-2010-4260 - FirstClass information disclosure vulnerability exposing user data.