CVE-2020-28396 in SICAM A8000 CP-8000
Summary
by MITRE • 12/15/2020
A vulnerability has been identified in SICAM A8000 CP-8000 (All versions < V16), SICAM A8000 CP-8021 (All versions < V16), SICAM A8000 CP-8022 (All versions < V16). A web server misconfiguration of the affected device can cause insecure ciphers usage by a user´s browser. An attacker in a privileged position could decrypt the communication and compromise confidentiality and integrity of the transmitted information.
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Analysis
by VulDB Data Team • 12/17/2020
This vulnerability resides in the SICAM A8000 series of industrial control devices including CP-8000, CP-8021, and CP-8022 models across all versions prior to V16. The issue stems from improper web server configuration that allows the use of insecure cryptographic ciphers during HTTPS communication between client browsers and the affected devices. This misconfiguration represents a critical flaw in the security architecture of these industrial systems, which are typically deployed in critical infrastructure environments where confidentiality and data integrity are paramount. The vulnerability falls under the category of weak cryptographic implementation as classified by CWE-327, which specifically addresses the use of insecure or weak cryptographic algorithms and protocols.
The technical flaw manifests when users access the web interface of these devices through a browser, as the server fails to properly configure its cryptographic settings to disable weak ciphers and enforce strong encryption standards. This misconfiguration enables man-in-the-middle attacks where an attacker positioned within the network can intercept and decrypt communication traffic between the browser and the device. The insecure cipher usage creates a pathway for attackers to compromise the confidentiality and integrity of transmitted information, potentially allowing them to access sensitive operational data, modify control parameters, or execute unauthorized commands. This vulnerability directly impacts the security posture of industrial control systems by undermining the fundamental security guarantees that HTTPS encryption is designed to provide.
The operational impact of this vulnerability extends beyond simple data interception, as these devices are typically part of critical infrastructure environments where industrial control systems manage physical processes. An attacker who successfully exploits this vulnerability could potentially gain unauthorized access to operational parameters, modify control settings, or extract sensitive information that could lead to operational disruption or safety hazards. The attack vector requires the adversary to be in a privileged network position, meaning they must have access to the same network segment as the affected devices, but this is often achievable in industrial environments where network segmentation may be insufficient. This vulnerability aligns with ATT&CK technique T1046 which involves network service scanning and T1566 which covers credential harvesting through social engineering or network infiltration methods.
Organizations should immediately implement remediation measures including updating the affected devices to version V16 or later, which contains the necessary cryptographic configuration fixes. Network administrators should also review and harden the web server configurations to disable weak ciphers and enforce strong encryption protocols such as TLS 1.2 or higher with modern cipher suites. Additional mitigations include implementing network segmentation to limit access to these devices, deploying intrusion detection systems to monitor for suspicious network activity, and conducting regular security assessments of industrial control systems. The vulnerability demonstrates the critical importance of proper cryptographic configuration in industrial environments and highlights the need for regular security updates and configuration reviews to maintain the security of operational technology systems.