CVE-2025-61735
📋 TL;DR
This CVE describes a Server-Side Request Forgery (SSRF) vulnerability in Apache Kylin that allows attackers to make unauthorized requests from the server to internal or external systems. It affects Apache Kylin versions 4.0.0 through 5.0.2 when system or project admin access is not properly secured. Attackers could potentially access internal services or sensitive data.
💻 Affected Systems
- Apache Kylin
📦 What is this software?
Kylin by Apache
⚠️ Risk & Real-World Impact
Worst Case
Attackers could access internal services, exfiltrate sensitive data, or pivot to other systems within the network environment.
Likely Case
Unauthorized access to internal HTTP services, potential data leakage from internal APIs or services.
If Mitigated
Limited impact if proper access controls are enforced and network segmentation restricts internal service access.
🎯 Exploit Status
Requires some level of access to Kylin system, though specific authentication requirements are not detailed in the advisory.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.0.3
Vendor Advisory: https://lists.apache.org/thread/yscobmx869zvprsykb94r24jtmb58ckh
Restart Required: Yes
Instructions:
1. Backup current Kylin configuration and data. 2. Download Apache Kylin 5.0.3 from official sources. 3. Stop the Kylin service. 4. Replace with version 5.0.3. 5. Restart the Kylin service. 6. Verify functionality.
🔧 Temporary Workarounds
Restrict Admin Access
allImplement strict access controls for Kylin system and project admin interfaces
Network Segmentation
allRestrict Kylin server's outbound network access to only necessary services
🧯 If You Can't Patch
- Implement strict network segmentation to limit Kylin server's ability to reach internal services
- Enforce strong authentication and authorization controls for all Kylin admin interfaces
🔍 How to Verify
Check if Vulnerable:
Check Apache Kylin version via web interface or configuration files. Versions 4.0.0 through 5.0.2 are vulnerable.Check Version:
Check KYLIN_HOME/conf/kylin.properties or web interface for version informationVerify Fix Applied:
Verify version is 5.0.3 or higher. Test SSRF functionality is properly restricted.📡 Detection & Monitoring
Log Indicators:
- Unusual outbound HTTP requests from Kylin server
- Access to internal services from Kylin IP
Network Indicators:
- HTTP requests from Kylin server to unexpected internal endpoints
- Outbound connections to unusual ports from Kylin
SIEM Query:
source_ip="kylin_server_ip" AND (dest_port NOT IN (80,443) OR dest_ip IN (internal_ranges))