CVE-2017-2309 in Junos Space
Summary
by MITRE
On Juniper Networks Junos Space versions prior to 16.1R1 when certificate based authentication is enabled for the Junos Space cluster, some restricted web services are accessible over the network. This represents an information leak risk.
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Analysis
by VulDB Data Team • 12/26/2020
The vulnerability identified as CVE-2017-2309 affects Juniper Networks Junos Space platforms running versions prior to 16.1R1 where certificate-based authentication is configured for the cluster. This represents a significant security weakness that undermines the intended access controls and authentication mechanisms within the system. The flaw specifically impacts restricted web services that should only be accessible through proper authenticated channels, creating an unintended information disclosure risk that could expose sensitive system components to unauthorized network access.
The technical root cause of this vulnerability stems from improper access control implementation within the Junos Space web service architecture. When certificate-based authentication is enabled, the system should enforce strict authorization boundaries to ensure that only authenticated and authorized users can access restricted services. However, the vulnerability allows certain web services to remain accessible over the network without proper authentication verification, effectively bypassing the certificate-based authentication controls. This misconfiguration creates a pathway for attackers to access restricted functionality through network-based reconnaissance and exploitation attempts.
The operational impact of this vulnerability extends beyond simple information disclosure to encompass potential system compromise and unauthorized access to critical infrastructure management functions. Attackers who exploit this vulnerability could gain access to restricted web services that typically contain sensitive operational data, configuration information, and management interfaces. This exposure creates opportunities for further attack vectors including privilege escalation, data exfiltration, and potential system disruption. The vulnerability particularly affects environments where Junos Space is used for network management and monitoring, making it a valuable target for adversaries seeking to compromise network infrastructure.
Organizations affected by CVE-2017-2309 should implement immediate mitigations including upgrading to Junos Space version 16.1R1 or later, which contains the necessary patches to address the access control flaw. Network segmentation and firewall rules should be implemented to restrict access to the affected web services, particularly when certificate-based authentication cannot be immediately enforced. The vulnerability aligns with CWE-284 which addresses improper access control and represents a clear violation of the principle of least privilege in system security design. From an attack perspective, this vulnerability maps to ATT&CK technique T1078 which covers valid accounts and credential access, as attackers could leverage the unauthorized access to restricted services to escalate privileges or gain deeper system access.
Security administrators should conduct comprehensive network scans to identify all affected Junos Space installations and verify that certificate-based authentication is properly configured and enforced. The patching process should include thorough testing to ensure that legitimate administrative access continues to function correctly after the security update is applied. Additionally, organizations should review their certificate management practices and implement proper certificate lifecycle management to prevent similar issues in the future. The vulnerability demonstrates the critical importance of proper access control implementation and the potential consequences when authentication mechanisms fail to properly enforce authorization boundaries in network management systems.