CVE-2024-51775
📋 TL;DR
This CVE describes a missing origin validation vulnerability in Apache Zeppelin's WebSocket implementation. Attackers can bypass same-origin policy restrictions to access the Zeppelin server from unauthorized origins and retrieve internal paragraph information. This affects Apache Zeppelin versions 0.11.1 through 0.11.x (before 0.12.0).
💻 Affected Systems
- Apache Zeppelin
📦 What is this software?
Zeppelin by Apache
⚠️ Risk & Real-World Impact
Worst Case
Unauthenticated attackers could access sensitive paragraph data, configuration details, and potentially leverage other vulnerabilities through the WebSocket connection.
Likely Case
Information disclosure of paragraph content, metadata, and potentially internal system details accessible through the WebSocket interface.
If Mitigated
Limited impact with proper network segmentation and access controls, though information leakage remains possible.
🎯 Exploit Status
Exploitation requires WebSocket access but no authentication. Attackers need to craft malicious WebSocket requests from different origins.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.12.0
Vendor Advisory: http://www.openwall.com/lists/oss-security/2025/08/03/5
Restart Required: Yes
Instructions:
1. Download Apache Zeppelin 0.12.0 from official sources. 2. Backup current configuration and data. 3. Stop Zeppelin service. 4. Replace installation with 0.12.0. 5. Restore configuration. 6. Start Zeppelin service.
🔧 Temporary Workarounds
WebSocket Origin Restriction
allImplement reverse proxy or application firewall rules to restrict WebSocket connections to trusted origins only.
# Example nginx configuration:
location /ws {
if ($http_origin !~* (^https?:\/\/(localhost|trusted\.domain\.com)$)) {
return 403;
}
proxy_pass http://zeppelin:8080;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
}
🧯 If You Can't Patch
- Implement strict network access controls to limit Zeppelin WebSocket endpoints to trusted networks only.
- Deploy a Web Application Firewall (WAF) with WebSocket protection rules to validate origin headers.
🔍 How to Verify
Check if Vulnerable:
Check Zeppelin version via web interface or configuration files. Versions 0.11.1 through 0.11.x are vulnerable.Check Version:
Check $ZEPPELIN_HOME/conf/zeppelin-env.sh or web interface About pageVerify Fix Applied:
After upgrade, verify version is 0.12.0 or later. Test WebSocket connections from unauthorized origins should be rejected.📡 Detection & Monitoring
Log Indicators:
- WebSocket connection attempts from unexpected origins
- Failed WebSocket handshakes with origin validation errors
Network Indicators:
- WebSocket traffic from unauthorized IPs/origins
- Unusual WebSocket connection patterns
SIEM Query:
websocket AND (origin NOT IN allowed_origins) OR (zeppelin AND websocket AND unauthorized_access)