CVE-2017-2323 in NorthStar Controller Application
Summary
by MITRE
A denial of service vulnerability in Juniper Networks NorthStar Controller Application prior to version 2.1.0 Service Pack 1 may allow a malicious attacker crafting packets destined to the device to cause a persistent denial of service to the path computation server service.
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Analysis
by VulDB Data Team • 04/24/2017
The vulnerability identified as CVE-2017-2323 represents a critical denial of service weakness within Juniper Networks NorthStar Controller Application ecosystem. This flaw specifically targets the path computation server service component that forms a fundamental part of the network controller's operational framework. The NorthStar Controller serves as a centralized management platform for service provider networks, orchestrating complex routing and path computation tasks across large-scale telecommunications infrastructures. The vulnerability exists in versions prior to 2.1.0 Service Pack 1, indicating that this was a known issue that required specific patching to address the underlying security flaw.
The technical mechanism behind this vulnerability involves the improper handling of crafted packets directed toward the affected device. When malicious actors exploit this weakness, they can construct specific packet payloads that trigger unexpected behavior within the path computation server service. This service is responsible for calculating optimal network paths and managing routing decisions across the controlled network infrastructure. The crafted packets leverage a flaw in the input validation or processing logic that fails to properly sanitize or reject malformed data packets. The vulnerability falls under the category of input validation errors and can be classified as a CWE-121 buffer overflow or similar memory corruption issue that leads to service disruption.
The operational impact of this vulnerability extends beyond simple service interruption, creating significant risks for network operators who rely on the NorthStar Controller for critical infrastructure management. When exploited, the denial of service condition can persist for extended periods, potentially disrupting network operations and requiring manual intervention to restore normal service. Network administrators face the challenge of maintaining service availability while dealing with the potential for repeated exploitation attempts. The path computation server service being targeted is essential for maintaining network performance and ensuring proper routing decisions are made across the controlled infrastructure. This vulnerability particularly affects service provider networks where continuous operation is critical for maintaining customer service levels and network reliability.
Security practitioners should recognize this vulnerability as a potential entry point for broader network disruption campaigns, aligning with ATT&CK technique T1499.002 for network disruption and T1498.001 for network denial of service. The vulnerability's impact is amplified in environments where the NorthStar Controller serves as a central management point for multiple network domains. Organizations should implement immediate mitigation strategies including applying the vendor-provided patch for version 2.1.0 Service Pack 1, implementing network segmentation to limit exposure, and deploying intrusion detection systems to monitor for suspicious packet patterns. The vulnerability demonstrates the importance of maintaining up-to-date security patches in network infrastructure components and highlights the critical nature of protecting core network management services from exploitation attempts. Network monitoring should include specific detection rules for malformed packets targeting the path computation server service to enable rapid response to potential exploitation attempts.