CVE-2018-0010 in Junos Space Security Director
Summary
by MITRE
A vulnerability in the Juniper Networks Junos Space Security Director allows a user who does not have SSH access to a device to reuse the URL that was created for another user to perform SSH access. Affected releases are all versions of Junos Space Security Director prior to 17.2R1.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 12/22/2019
This vulnerability exists within Juniper Networks Junos Space Security Director software where improper session management allows unauthorized users to exploit URL reuse mechanisms for SSH access to network devices. The flaw stems from insufficient validation of session tokens and URL parameters that are generated for legitimate users, creating a path for privilege escalation through session hijacking techniques. The vulnerability affects all versions prior to 17.2R1, indicating a long-standing issue in the software's authentication and authorization framework that was not properly addressed in the affected release cycle.
The technical implementation of this vulnerability involves the reuse of time-limited session URLs that contain embedded authentication tokens or credentials. When a legitimate user requests SSH access to a device through the Security Director interface, the system generates a unique URL containing session identifiers that should be tied exclusively to that user's authenticated context. However, the system fails to properly validate that the URL being accessed belongs to the requesting user, allowing any authenticated user to potentially reuse a valid session URL created for another user. This represents a classic session management flaw that can be categorized under CWE-613 Insufficient Session Expiration and CWE-384 Session Fixation.
The operational impact of this vulnerability is significant as it enables attackers to bypass normal SSH access controls and gain unauthorized administrative access to network devices managed through the Junos Space Security Director. An attacker could potentially escalate privileges by reusing session URLs obtained through various means including social engineering, session interception, or by simply accessing the URLs from a different user context. The vulnerability essentially undermines the principle of least privilege by allowing unauthorized access to critical network infrastructure components that should only be accessible to authorized administrators. This issue aligns with ATT&CK technique T1078 Valid Accounts where adversaries leverage legitimate credentials to gain access to systems, though in this case the access is facilitated through session reuse rather than direct credential theft.
Organizations using affected versions of Junos Space Security Director face substantial risk of unauthorized device access, potential data breaches, and compromise of network security controls. The vulnerability could enable attackers to execute arbitrary commands on target devices, modify network configurations, or establish persistent access points within the network infrastructure. Network defenders should consider this vulnerability as part of a broader attack chain that could lead to complete network compromise, especially when combined with other exploitation techniques. The remediation approach requires immediate deployment of Junos Space Security Director version 17.2R1 or later, which includes proper session validation mechanisms and token binding that prevent URL reuse across different user contexts. Additionally, organizations should implement network monitoring to detect unusual session activity patterns and consider implementing additional authentication layers such as multi-factor authentication to reduce the impact of potential session hijacking attempts.