CVE-2016-4926 in Junos Space
Summary
by MITRE
Insufficient authentication vulnerability in Junos Space before 15.2R2 allows remote network based users with access to Junos Space web interface to perform certain administrative tasks without authentication.
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Analysis
by VulDB Data Team • 09/10/2020
The vulnerability identified as CVE-2016-4926 represents a critical insufficient authentication flaw within Junos Space platform versions prior to 15.2R2. This vulnerability specifically affects the web interface component of the Junos Space network management system, which is widely used by network administrators to manage junos-based network devices across enterprise environments. The issue stems from inadequate validation of user credentials and session management within the web-based administrative interface, creating a significant security risk for organizations relying on this platform for network operations and device management.
The technical nature of this vulnerability allows remote attackers who can access the Junos Space web interface to bypass authentication mechanisms and execute administrative functions without proper authorization. This flaw operates at the application layer and leverages weaknesses in the authentication flow where the system fails to properly validate user identities before granting access to privileged administrative features. The vulnerability is particularly concerning because it enables attackers to perform actions that should only be available to authenticated administrators, including configuration changes, device management operations, and potentially unauthorized access to network resources. This issue directly maps to CWE-287 which addresses improper authentication vulnerabilities, and aligns with ATT&CK technique T1078 for valid accounts and T1566 for credential access through web application attacks.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it provides attackers with the ability to manipulate network configurations and potentially disrupt network services. Network administrators who rely on Junos Space for centralized management may find their systems compromised, leading to potential data breaches, service interruptions, and unauthorized modifications to network infrastructure. The remote nature of the attack means that adversaries do not require physical access to the network or direct network connectivity to the management interface, making the vulnerability particularly dangerous in environments where the web interface is accessible from untrusted networks. Organizations may experience significant operational disruption as attackers could modify device configurations, disable security features, or establish persistent access points within their network infrastructure.
Organizations affected by this vulnerability should immediately implement mitigations including upgrading to Junos Space version 15.2R2 or later, which contains the necessary authentication fixes. Network segmentation should be implemented to restrict access to the Junos Space web interface, ensuring that only authorized personnel can reach the management interface. Additional protective measures include implementing strong access controls, monitoring for unauthorized access attempts, and conducting regular security assessments of network management systems. The vulnerability highlights the importance of maintaining up-to-date network management platforms and demonstrates how authentication weaknesses in management interfaces can provide attackers with extensive privileges within network environments. Security teams should also consider implementing network-based intrusion detection systems to monitor for suspicious activity related to the Junos Space interface and establish incident response procedures specifically addressing authentication bypass vulnerabilities in network management systems.