CVE-2024-48944 in Kylin
Summary
by MITRE • 03/27/2025
Server-Side Request Forgery (SSRF) vulnerability in Apache Kylin. Through a kylin server, an attacker may forge a request to invoke "/kylin/api/xxx/diag" api on another internal host and possibly get leaked information. There are two preconditions: 1) The attacker has got admin access to a kylin server; 2) Another internal host has the "/kylin/api/xxx/diag" api
endpoint open for service.
This issue affects Apache Kylin: from 5.0.0 through
5.0.1.
Users are recommended to upgrade to version 5.0.2, which fixes the issue.
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Analysis
by VulDB Data Team • 03/27/2025
Server-Side Request Forgery vulnerabilities represent a critical class of security flaws that allow attackers to manipulate server-side requests to access internal resources that should otherwise be protected from external access. In the case of Apache Kylin, this vulnerability specifically targets the diagnostic API endpoint at /kylin/api/xxx/diag which can be exploited by authenticated users with administrative privileges to make unauthorized requests to other internal systems. The flaw exists because the application fails to properly validate and sanitize user-supplied input that determines the target of outbound requests, creating a pathway for attackers to bypass normal network security controls and potentially access sensitive information from internal services.
The technical implementation of this vulnerability stems from inadequate input validation within the kylin server's request handling mechanism. When an attacker with administrative access makes a request to the diagnostic API, the system processes user-controllable parameters without sufficient sanitization or destination verification. This allows the attacker to specify arbitrary internal IP addresses or hostnames that can be reached from the kylin server's network context, effectively enabling them to probe and potentially exfiltrate information from other internal services that expose the same diagnostic endpoint structure. The vulnerability is particularly dangerous because it leverages legitimate administrative access within the system to extend the attack surface beyond what was initially intended.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can potentially enable more sophisticated attacks by allowing an attacker to map internal network topology and identify other vulnerable services. The fact that this requires administrative access as a precondition means that the vulnerability is somewhat limited in its initial exploitation scope, but once achieved, it provides significant reconnaissance capabilities for attackers who have already compromised administrative credentials. This aligns with common attack patterns documented in the MITRE ATT&CK framework where privilege escalation and lateral movement are key phases in attack progression. The vulnerability affects versions 5.0.0 through 5.0.1 of Apache Kylin, indicating that this was a regression or oversight in the security controls implemented during the development cycle.
Security practitioners should recognize this vulnerability as falling under CWE-918, which specifically addresses Server-Side Request Forgery and is categorized as a critical weakness in software design. The recommended mitigation strategy involves upgrading to version 5.0.2 which implements proper input validation and destination restriction for outbound requests. Organizations should also consider implementing network segmentation and access controls to limit the blast radius of such vulnerabilities, ensuring that even if an attacker compromises administrative credentials, their ability to move laterally through internal systems remains constrained. Additional defensive measures could include monitoring for unusual outbound request patterns and implementing strict firewall rules to prevent communication with internal services from external-facing applications.