CVE-2020-15346 in CloudCNM SecuManager
Summary
by MITRE • 09/29/2022
Zyxel CloudCNM SecuManager 3.1.0 and 3.1.1 has a /live/GLOBALS API with the CLOUDCNM key.
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Analysis
by VulDB Data Team • 10/25/2022
The vulnerability identified as CVE-2020-15346 affects Zyxel CloudCNM SecuManager versions 3.1.0 and 3.1.1, representing a critical security flaw in the cloud-based network management system. This issue manifests through an exposed API endpoint at /live/GLOBALS that contains the CLOUDCNM key, creating a significant exposure risk for organizations utilizing this network management platform. The vulnerability stems from improper access control mechanisms that allow unauthorized entities to gain access to sensitive configuration data and authentication tokens through a publicly accessible API route.
The technical flaw involves a misconfigured API endpoint that exposes administrative credentials and system keys without proper authentication requirements. The CLOUDCNM key referenced in the GLOBALS API endpoint represents a critical authentication token that, when accessed by unauthorized parties, can provide elevated privileges within the SecuManager system. This weakness aligns with CWE-284, which addresses improper access control vulnerabilities, and demonstrates how insufficient authorization checks can lead to privilege escalation and system compromise. The exposed key allows attackers to potentially bypass normal authentication procedures and gain administrative access to the network management infrastructure.
The operational impact of this vulnerability extends beyond simple credential exposure, as it provides attackers with a pathway to establish persistent access to the SecuManager system. Once an attacker obtains the CLOUDCNM key, they can manipulate network configurations, monitor traffic, and potentially exfiltrate sensitive data from the managed network environment. This vulnerability directly maps to ATT&CK technique T1078.004, which covers valid accounts with default passwords, and T1566.001, concerning spearphishing via social engineering, as the exposed key could be used to establish unauthorized access to network management systems. Organizations using affected Zyxel SecuManager versions face potential network infiltration, data breaches, and disruption of critical network services.
Mitigation strategies for CVE-2020-15346 require immediate implementation of network segmentation to isolate the affected system from critical network infrastructure, along with comprehensive access control reviews to ensure proper authentication mechanisms are in place. Organizations should implement network monitoring to detect unauthorized access attempts and establish secure communication channels for API endpoints. The vulnerability also necessitates immediate patching of affected systems to address the improper access control configuration, while security teams should conduct thorough vulnerability assessments to identify any potential compromise of the exposed CLOUDCNM keys. Additionally, organizations should review their API security practices and implement proper authentication requirements for all administrative endpoints, ensuring that sensitive system keys are not exposed through publicly accessible routes.