CVE-2017-2331 in NorthStar Controller Application
Summary
by MITRE
A firewall bypass vulnerability in Juniper Networks NorthStar Controller Application prior to version 2.1.0 Service Pack 1 may allow a network-based malicious attacker to bypass firewall policies, leading to authentication bypass methods, information disclosure, modification of system files, and denials of service.
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Analysis
by VulDB Data Team • 04/24/2017
The CVE-2017-2331 vulnerability represents a critical firewall bypass flaw in Juniper Networks NorthStar Controller Application affecting versions prior to 2.1.0 Service Pack 1. This vulnerability resides within the network-based security controls of a widely deployed network management platform that orchestrates and controls network infrastructure. The NorthStar Controller serves as a central management system for complex network environments, making this flaw particularly dangerous as it undermines the fundamental security boundaries that protect network assets from unauthorized access and malicious activities.
The technical implementation of this vulnerability stems from improper validation of network traffic and authentication mechanisms within the NorthStar Controller's firewall enforcement components. Attackers can exploit this weakness to circumvent the established security policies that normally restrict access to sensitive network resources and system functions. The flaw essentially allows malicious actors to establish unauthorized communication channels that bypass the normal authentication procedures and access controls that should protect the system from external threats. This bypass capability extends beyond simple network access to include potential system file modifications and information disclosure mechanisms that could compromise the entire network infrastructure.
The operational impact of CVE-2017-2331 extends far beyond traditional network security concerns, as it creates multiple attack vectors that can be leveraged for comprehensive system compromise. Network-based attackers can exploit this vulnerability to gain unauthorized access to the controller's administrative interfaces, potentially enabling them to modify critical system configurations, extract sensitive network data, or disrupt network operations through denial of service conditions. The vulnerability's ability to facilitate authentication bypass means that attackers could potentially operate with elevated privileges within the network management environment, undermining the security posture of the entire network infrastructure that the NorthStar Controller manages.
Organizations utilizing Juniper Networks NorthStar Controller applications should prioritize immediate remediation through the installation of Service Pack 1 for version 2.1.0 or higher, as this represents the official patch addressing the identified firewall bypass vulnerability. Security teams should also implement network segmentation strategies to limit the potential impact of exploitation, while monitoring for unusual network traffic patterns that might indicate unauthorized access attempts. The vulnerability aligns with CWE-284, which addresses improper access control, and maps to ATT&CK techniques involving privilege escalation and persistence mechanisms. Additional mitigations should include implementing network-based intrusion detection systems, conducting thorough access control reviews, and establishing robust network monitoring protocols to detect and respond to potential exploitation attempts.