CVE-2024-23590
📋 TL;DR
This CVE describes a session fixation vulnerability in Apache Kylin that allows attackers to hijack user sessions by fixing session identifiers before authentication. It affects all Apache Kylin deployments from version 2.0.0 through 4.x, potentially compromising any organization using these versions for business intelligence and analytics.
💻 Affected Systems
- Apache Kylin
📦 What is this software?
Kylin by Apache
⚠️ Risk & Real-World Impact
Worst Case
Attackers could gain unauthorized administrative access to the Kylin platform, potentially accessing sensitive business data, manipulating analytics results, or using the compromised system as a foothold for further network attacks.
Likely Case
Attackers could hijack user sessions to access business intelligence data they shouldn't have access to, potentially exposing sensitive business metrics, customer information, or proprietary analytics.
If Mitigated
With proper network segmentation and access controls, the impact would be limited to the Kylin application itself, though sensitive data within Kylin could still be compromised.
🎯 Exploit Status
Session fixation attacks typically require some level of user interaction or access to trick users into using attacker-controlled session IDs.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.0.0 or above
Vendor Advisory: https://lists.apache.org/thread/7161154h0k6zygr9917qq0g95p39szml
Restart Required: Yes
Instructions:
1. Backup current Kylin configuration and data. 2. Download Apache Kylin 5.0.0 or later from the official Apache website. 3. Stop the Kylin service. 4. Replace the Kylin installation with the new version. 5. Restore configuration and data. 6. Start the Kylin service.
🔧 Temporary Workarounds
Session Regeneration After Authentication
allImplement custom session handling to regenerate session IDs after successful authentication
# Requires custom code modification to Kylin's authentication flow
Network Isolation
linuxRestrict access to Kylin instances to trusted networks only
# Firewall rule example: iptables -A INPUT -p tcp --dport 7070 -s trusted_network -j ACCEPT
# iptables -A INPUT -p tcp --dport 7070 -j DROP
🧯 If You Can't Patch
- Implement strict network access controls to limit who can access Kylin instances
- Deploy a web application firewall (WAF) with session fixation protection rules
🔍 How to Verify
Check if Vulnerable:
Check the Apache Kylin version by accessing the web interface and looking at the version in the footer or by checking the kylin.version file in the installation directory.Check Version:
grep 'kylin.version' ${KYLIN_HOME}/conf/kylin.properties || cat ${KYLIN_HOME}/VERSIONVerify Fix Applied:
Verify the installed version is 5.0.0 or higher and test session handling by logging in and checking if session IDs change after authentication.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts followed by successful login with same session ID
- User sessions with unusually long durations or from unexpected locations
Network Indicators:
- Unusual patterns of session ID reuse across different IP addresses
- Session IDs appearing in URLs or referrer headers
SIEM Query:
source="kylin-access.log" (session_id=* AND (status=200 OR status=302)) | stats count by session_id, src_ip | where count > threshold