CVE-2024-29020 in JumpServer
Summary
by MITRE • 03/29/2024
JumpServer is an open source bastion host and an operation and maintenance security audit system. An authorized attacker can obtain sensitive information contained within playbook files if they manage to learn the playbook_id of another user. This breach of confidentiality can lead to information disclosure and exposing sensitive data. This vulnerability is fixed in v3.10.6.
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Analysis
by VulDB Data Team • 01/10/2025
JumpServer represents a critical security vulnerability in version 3.10.5 and earlier where unauthorized information disclosure occurs through playbook file access. This vulnerability stems from insufficient access controls within the system's playbook management functionality, allowing authenticated users to potentially discover and access playbook files belonging to other users by simply knowing the target playbook_id. The flaw exists in the privilege escalation and access control mechanisms that should prevent cross-user data access within the bastion host environment. This represents a direct violation of the principle of least privilege and data isolation that security audit systems must maintain to protect operational integrity. The vulnerability enables attackers with basic authentication credentials to escalate their access scope beyond intended boundaries, potentially exposing sensitive operational procedures, system configurations, and audit trails that should remain confidential to authorized personnel only. This issue directly relates to CWE-284 Access Control and CWE-312 Cleartext Storage of Sensitive Information, as it demonstrates inadequate access controls and the exposure of sensitive operational data through predictable identifiers.
The technical implementation of this vulnerability involves the system's failure to properly validate user permissions when accessing playbook resources. When an attacker discovers a valid playbook_id through reconnaissance or other means, the system does not adequately verify whether the requesting user has proper authorization to access that specific playbook file. This creates an information disclosure scenario where sensitive operational data can be accessed without proper authentication or authorization checks. The vulnerability is particularly concerning in audit and security operations environments where bastion hosts serve as critical control points for monitoring and managing system access. The exposure of playbook files can reveal operational procedures, security policies, and potentially sensitive configuration details that could be exploited by malicious actors. The system's architecture lacks proper user context validation during playbook access requests, allowing privilege escalation through simple identifier guessing or enumeration techniques.
The operational impact of this vulnerability extends beyond simple information disclosure to compromise the integrity of the entire security audit system. When playbook files containing sensitive operational information are exposed, it undermines the trust model that security audit systems must maintain to ensure proper monitoring and control of system access. Attackers can exploit this vulnerability to gather intelligence about target systems, operational procedures, and potentially identify additional attack vectors within the network infrastructure. This vulnerability directly impacts the confidentiality and integrity of the security audit system, as it allows unauthorized access to operational data that should remain protected. The exposure of playbook files can reveal internal security policies, system configurations, and operational procedures that could be used to plan targeted attacks against the organization. Organizations relying on JumpServer for security operations and audit functions face significant risk of operational compromise, as this vulnerability undermines the fundamental security guarantees that bastion hosts are designed to provide.
Organizations should immediately upgrade to JumpServer version 3.10.6 or later to address this vulnerability, as this release includes proper access control validation for playbook file access. The fix implements mandatory user context verification before allowing access to playbook resources, ensuring that users can only access files they are authorized to view. Additional mitigations include implementing network segmentation to limit access to JumpServer systems, enforcing strict access controls and monitoring for unusual playbook access patterns, and conducting regular security audits to identify potential unauthorized access attempts. Security teams should also implement logging and monitoring solutions that can detect and alert on playbook access attempts that deviate from normal user behavior patterns, as these could indicate exploitation attempts. The vulnerability demonstrates the critical importance of proper access control implementation in security audit systems, as inadequate controls can completely undermine the security posture of organizations relying on such platforms for operational protection. This vulnerability also highlights the need for comprehensive security testing of access control mechanisms, particularly in systems where operational data and security procedures are stored in easily accessible formats.