CVE-2024-12556
📋 TL;DR
This vulnerability allows attackers to exploit prototype pollution in Kibana to achieve code injection by combining unrestricted file upload with path traversal. It affects Kibana instances with vulnerable versions, potentially enabling remote code execution. Organizations using affected Kibana versions for data visualization and monitoring are at risk.
💻 Affected Systems
- Kibana
📦 What is this software?
Kibana by Elastic
Kibana by Elastic
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attackers to execute arbitrary code on the Kibana server, potentially leading to data exfiltration, lateral movement, or ransomware deployment.
Likely Case
Unauthorized file upload leading to server-side code execution, enabling data theft, modification of Kibana dashboards, or persistence mechanisms.
If Mitigated
Limited impact with proper network segmentation and access controls, potentially only affecting the Kibana service itself.
🎯 Exploit Status
Exploitation requires combining multiple techniques (prototype pollution, file upload, path traversal), but detailed technical information is available in the advisory.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.16.4 and 8.17.2
Vendor Advisory: https://discuss.elastic.co/t/kibana-8-16-4-and-8-17-2-security-update-esa-2025-02/376918
Restart Required: Yes
Instructions:
1. Backup Kibana configuration and data. 2. Download Kibana 8.16.4 or 8.17.2 from Elastic website. 3. Stop Kibana service. 4. Replace existing installation with patched version. 5. Restart Kibana service. 6. Verify functionality.
🔧 Temporary Workarounds
Restrict File Upload Endpoints
allConfigure web application firewall or reverse proxy to block or restrict access to file upload endpoints in Kibana.
# Example nginx location block
location /api/kibana/uploads {
deny all;
}
Network Segmentation
linuxIsolate Kibana instances from sensitive networks and restrict inbound connections to trusted sources only.
# Example iptables rule
sudo iptables -A INPUT -p tcp --dport 5601 -s trusted_ip_range -j ACCEPT
sudo iptables -A INPUT -p tcp --dport 5601 -j DROP
🧯 If You Can't Patch
- Implement strict network access controls to limit Kibana exposure
- Disable or restrict file upload functionality in Kibana configuration
🔍 How to Verify
Check if Vulnerable:
Check Kibana version via web interface (Settings → About) or command: curl -X GET 'http://kibana-host:5601/api/status' | grep numberCheck Version:
curl -s http://localhost:5601/api/status | grep -o '"number":"[^"]*"' | cut -d'"' -f4Verify Fix Applied:
Confirm version is 8.16.4 or 8.17.2 or higher, and test file upload functionality with malicious payloads.📡 Detection & Monitoring
Log Indicators:
- Unusual file upload patterns
- Requests to prototype pollution endpoints
- Path traversal attempts in upload requests
Network Indicators:
- Multiple failed upload attempts followed by successful upload
- Unusual outbound connections from Kibana server
SIEM Query:
source="kibana.log" AND ("file.upload" OR "prototype" OR "__proto__") AND status=200