CVE-2021-20656 in SolarView Compact SV-CPT-MC310
Summary
by MITRE • 02/24/2021
Exposure of information through directory listing in SolarView Compact SV-CPT-MC310 prior to Ver.6.5 allows an authenticated attacker to obtain the information inside the system, such as directories and/or file configurations via unspecified vectors.
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Analysis
by VulDB Data Team • 03/05/2021
The vulnerability identified as CVE-2021-20656 represents a critical information disclosure flaw within the SolarView Compact SV-CPT-MC310 network monitoring device. This issue affects firmware versions prior to 6.5 and stems from improper access control mechanisms that allow authenticated attackers to enumerate directory structures and access sensitive file configurations through unspecified vectors. The vulnerability resides in the device's web interface implementation where directory listing capabilities are improperly configured, creating an information exposure condition that violates fundamental security principles of least privilege and access control.
From a technical perspective, this vulnerability manifests as a directory traversal and information disclosure weakness that operates within the context of an authenticated session. The flaw allows an attacker who has already established valid credentials to access directories and files that should remain restricted, effectively bypassing intended access controls. This type of vulnerability typically maps to CWE-200 (Information Exposure) and potentially CWE-540 (Information Exposure Through Source Code) depending on the nature of accessible files. The unspecified vectors suggest that the attack could potentially occur through multiple pathways including but not limited to improper directory permissions, lack of proper access validation, or insecure file handling routines within the device's web server implementation.
The operational impact of this vulnerability extends beyond simple information disclosure, as the exposed directory listings and file configurations can provide attackers with valuable intelligence for further exploitation attempts. An attacker can use the gathered information to identify potential attack vectors, understand the system architecture, locate sensitive configuration files, and discover potential vulnerabilities within the firmware. This intelligence gathering capability significantly increases the risk profile of the compromised device and can lead to more sophisticated attacks including privilege escalation, lateral movement, or even complete system compromise. The vulnerability directly impacts the device's security posture by weakening its access control mechanisms and exposing internal system structures.
Security professionals should recognize this vulnerability as a significant concern within industrial control systems and network monitoring environments where the SolarView Compact SV-CPT-MC310 devices are deployed. The threat landscape for such devices includes both nation-state actors and organized cybercriminal groups targeting operational technology infrastructure. This vulnerability creates opportunities for attackers to perform reconnaissance activities that could lead to more serious security incidents. Organizations should consider implementing network segmentation, access control restrictions, and monitoring for unusual directory access patterns as part of their defensive strategies. The vulnerability also highlights the importance of regular firmware updates and proper security configuration management within OT environments where devices may operate for extended periods without security updates.
Mitigation strategies should focus on immediate firmware upgrades to version 6.5 or later where the vulnerability has been addressed. Network administrators should implement additional access controls including IP whitelisting, strong authentication mechanisms, and regular security audits of device configurations. The principle of least privilege should be enforced by restricting directory access permissions and ensuring that only necessary users have access to system directories. Organizations should also establish monitoring procedures to detect and alert on unauthorized directory listing attempts and implement proper network segmentation to limit the potential impact of such vulnerabilities. This vulnerability demonstrates the critical importance of maintaining up-to-date firmware and implementing comprehensive security controls within industrial environments where device security is paramount to overall operational resilience.