CVE-2024-52279 in Zeppelin
Summary
by MITRE • 08/03/2025
Improper Input Validation vulnerability in Apache Zeppelin. The fix for JDBC URL validation in CVE-2024-31864 did not account for URL encoded input.
This issue affects Apache Zeppelin: from 0.11.1 before 0.12.0.
Users are recommended to upgrade to version 0.12.0, which fixes the issue.
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Analysis
by VulDB Data Team • 08/06/2025
The vulnerability CVE-2024-52279 represents a critical improper input validation flaw within Apache Zeppelin, a popular web-based notebook application for data analysis and visualization. This weakness specifically targets the JDBC URL validation mechanism that was previously addressed in CVE-2024-31864, demonstrating how security patches can sometimes leave gaps when not thoroughly tested against all possible input formats. The vulnerability affects Apache Zeppelin versions ranging from 0.11.1 through the pre-release versions of 0.12.0, creating a window of exposure for organizations relying on this platform for their analytical workloads. The flaw stems from insufficient validation of URL encoded input, which allows malicious actors to bypass security controls that were intended to prevent unauthorized database connections through crafted input sequences.
The technical implementation of this vulnerability occurs at the input sanitization layer where the application processes JDBC connection strings for database connectivity. When users provide JDBC URLs for connecting to databases, the system should validate these inputs to prevent injection attacks and unauthorized access attempts. However, the validation logic fails to properly decode and validate URL encoded characters within the JDBC connection strings, creating a pathway for attackers to craft malicious inputs that appear legitimate to the validation routine but contain hidden malicious components. This particular flaw falls under CWE-20, Improper Input Validation, which is a fundamental weakness in software security that occurs when applications fail to properly validate or sanitize user-provided input data. The vulnerability demonstrates how URL encoding can be exploited to circumvent security controls, particularly when validation routines do not account for the full spectrum of possible input representations.
The operational impact of this vulnerability extends beyond simple data integrity concerns to potentially enable unauthorized database access and data exfiltration. Attackers could leverage this weakness to establish connections to databases they should not have access to, potentially leading to data breaches, privilege escalation, or system compromise. The vulnerability particularly affects organizations using Apache Zeppelin for sensitive data analysis workloads, where database connections are frequently established through user-provided JDBC URLs. Given that Zeppelin is commonly used in enterprise environments for analytics and reporting, the potential for cascading security incidents increases significantly. This vulnerability also aligns with ATT&CK technique T1190, Exploit Public-Facing Application, as it represents a software flaw that could be exploited by external attackers to gain unauthorized access to backend database systems.
Organizations should prioritize immediate remediation by upgrading to Apache Zeppelin version 0.12.0, which includes the necessary fixes to properly handle URL encoded input validation. The mitigation strategy should also include monitoring for suspicious JDBC connection attempts and implementing additional input validation controls at the network level. Security teams should conduct comprehensive vulnerability assessments to identify any systems running affected versions of Zeppelin and ensure that all database connection strings are properly validated. The incident also highlights the importance of thorough regression testing for security patches, as the initial fix for CVE-2024-31864 did not adequately consider all possible input encoding scenarios. Organizations should also consider implementing network segmentation and database access controls to limit the potential impact of any successful exploitation attempts, as the vulnerability could potentially be leveraged for lateral movement within network environments.