CVE-2017-2327 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 an authenticated malicious user to consume large amounts of system resources leading to a cascading denial of services.
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Analysis
by VulDB Data Team • 04/24/2017
The vulnerability identified as CVE-2017-2327 represents a critical denial of service weakness within Juniper Networks NorthStar Controller Application, specifically affecting versions prior to 2.1.0 Service Pack 1. This flaw resides in the application's resource management mechanisms and allows authenticated attackers to exploit system resources in a manner that can trigger cascading failures across the network infrastructure. The NorthStar Controller serves as a central management platform for Juniper's routing and switching devices, making this vulnerability particularly dangerous as it can disrupt core networking operations.
The technical implementation of this vulnerability stems from insufficient input validation and resource allocation controls within the application's processing pipeline. An authenticated malicious user can craft specific requests that cause the system to consume excessive memory and CPU resources without proper bounds checking or resource limiting mechanisms. This type of flaw aligns with CWE-400, which categorizes uncontrolled resource consumption as a fundamental weakness in resource management. The vulnerability operates by exploiting the application's handling of certain data structures or processing loops that do not properly implement resource exhaustion protections, allowing an attacker to repeatedly submit crafted inputs that gradually deplete system resources.
The operational impact of CVE-2017-2327 extends beyond simple service disruption to potentially cause widespread network instability. When exploited, the vulnerability can lead to cascading failures where one compromised component affects adjacent systems, creating a domino effect throughout the network infrastructure. This behavior demonstrates characteristics consistent with ATT&CK technique T1499, which describes resource exhaustion attacks that can cause denial of service conditions. The vulnerability is particularly concerning in enterprise environments where the NorthStar Controller manages critical routing and switching operations, as it can render network management capabilities unusable and potentially impact data plane operations.
Mitigation strategies for this vulnerability should prioritize immediate deployment of the vendor-provided patch or update to version 2.1.0 Service Pack 1, which includes proper resource management controls and input validation. Network administrators should implement additional monitoring controls to detect unusual resource consumption patterns that might indicate exploitation attempts. Access controls should be reinforced to limit authentication privileges to only necessary personnel, reducing the attack surface for authenticated exploitation. Security teams should also consider implementing rate limiting and resource consumption thresholds to prevent single malicious users from consuming excessive system resources. The remediation process should include comprehensive testing of the updated software to ensure that the patch does not introduce compatibility issues with existing network management workflows.