CVE-2017-2326 in NorthStar Controller Application
Summary
by MITRE
An information disclosure vulnerability in Juniper Networks NorthStar Controller Application prior to version 2.1.0 Service Pack 1 may allow an unprivileged, authenticated, network-based attacker to replicate the underlying Junos OS VM and all data it maintains to their local system for future analysis.
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Analysis
by VulDB Data Team • 04/24/2017
The vulnerability identified as CVE-2017-2326 represents a critical information disclosure flaw within Juniper Networks NorthStar Controller Application ecosystem. This security weakness affects versions prior to 2.1.0 Service Pack 1 and creates a significant risk for organizations relying on Juniper's network management solutions. The vulnerability specifically targets the authentication and authorization mechanisms of the NorthStar Controller, which serves as a central management platform for Junos OS-based network devices. The flaw enables an attacker with minimal privileges to exploit a design weakness that allows for unauthorized data replication from the underlying Junos OS virtual machine environment.
The technical implementation of this vulnerability stems from insufficient access controls and inadequate data protection mechanisms within the NorthStar Controller's replication functionality. An unprivileged attacker who has successfully authenticated to the system can leverage this flaw to extract complete copies of the underlying Junos OS virtual machine along with all associated data. This includes sensitive configuration information, network topology data, device credentials, and potentially other confidential operational details that the virtual machine maintains. The vulnerability essentially provides a backdoor mechanism for data exfiltration that bypasses normal security boundaries between the controller and the underlying network infrastructure.
From an operational impact perspective, this vulnerability creates severe consequences for network security posture and compliance requirements. Organizations utilizing affected Juniper NorthStar Controller versions face potential exposure of their entire network management infrastructure to unauthorized access. The replication capability allows attackers to obtain comprehensive snapshots of network operations that could be used for further attacks, including privilege escalation, lateral movement, or targeted exploitation of specific network devices. The extracted data could reveal critical network architecture details, operational procedures, and security configurations that would otherwise remain protected. This information disclosure could significantly undermine network defense strategies and potentially enable advanced persistent threat actors to conduct more sophisticated attacks against the organization's infrastructure.
Security practitioners should implement immediate mitigations including upgrading to Juniper NorthStar Controller version 2.1.0 Service Pack 1 or later, which contains the necessary patches to address this vulnerability. Organizations should also review and strengthen their network-based authentication controls, implement additional monitoring for unusual replication activities, and conduct thorough security assessments of their network management systems. The vulnerability aligns with CWE-200, which addresses "Information Exposure," and represents a clear violation of the principle of least privilege as defined in the NIST Cybersecurity Framework. From an attack perspective, this flaw maps to ATT&CK technique T1005, "Data from Local System," and T1041, "Exfiltration Over C2 Channel," making it a significant concern for organizations under the scrutiny of compliance frameworks such as SOC 2, ISO 27001, and PCI DSS. The vulnerability demonstrates the critical importance of maintaining up-to-date security patches and implementing comprehensive network segmentation strategies to prevent lateral movement and data exfiltration attacks.