CVE-2023-29055
📋 TL;DR
Apache Kylin versions 2.0.0 to 4.0.3 expose server credentials through an unencrypted web interface that displays the kylin.properties file contents. Attackers can intercept network traffic to steal credentials when HTTP is used instead of HTTPS. This affects all Apache Kylin deployments using vulnerable versions with the Server Config interface accessible.
💻 Affected Systems
- Apache Kylin
📦 What is this software?
Kylin by Apache
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain administrative credentials, leading to complete system compromise, data theft, and potential lateral movement to connected systems.
Likely Case
Credential theft allowing unauthorized access to the Kylin instance and potentially connected databases or services.
If Mitigated
Limited to information disclosure without sensitive credentials present, or no impact with proper encryption and access controls.
🎯 Exploit Status
Exploitation requires network access to intercept unencrypted HTTP traffic; no authentication needed to access the vulnerable interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apache Kylin 4.0.4
Vendor Advisory: https://lists.apache.org/thread/o1bvyv9wnfkx7dxpfjlor20nykgsoh6r
Restart Required: Yes
Instructions:
1. Download Apache Kylin 4.0.4 from official sources. 2. Backup current installation and data. 3. Stop Kylin service. 4. Replace with new version. 5. Restart Kylin service. 6. Verify functionality.
🔧 Temporary Workarounds
Enable HTTPS
allConfigure Kylin to use HTTPS instead of HTTP to encrypt network traffic.
Configure SSL/TLS in kylin.properties: kylin.server.https-port=443
Set up SSL certificates and restart service
Remove credentials from kylin.properties
allMove sensitive credentials to secure storage or encrypt them within the file.
Edit kylin.properties to remove or encrypt credential entries
Use environment variables or secure vault for credentials
🧯 If You Can't Patch
- Implement strict network segmentation and firewall rules to limit access to Kylin servers
- Deploy network monitoring and intrusion detection to alert on suspicious traffic patterns
🔍 How to Verify
Check if Vulnerable:
Check Kylin version via web interface or command: grep 'kylin.version' kylin.propertiesCheck Version:
grep 'kylin.version' /path/to/kylin.propertiesVerify Fix Applied:
After upgrade, confirm version is 4.0.4+ and test that Server Config interface no longer displays sensitive content from kylin.properties📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to Server Config interface
- Failed authentication attempts following credential exposure
Network Indicators:
- Unencrypted HTTP traffic to Kylin servers on unusual ports
- Suspicious outbound connections from Kylin servers
SIEM Query:
source="kylin.log" AND (uri="/kylin/api/admin/config" OR message="credentials")