CVE-2022-24320 in EcoStruxure Geo SCADA Expert
Summary
by MITRE • 02/10/2022
A CWE-295: Improper Certificate Validation vulnerability exists that could allow a Man-in-theMiddle attack when communications between the client and Geo SCADA database server are intercepted. Affected Product: ClearSCADA (All Versions), EcoStruxure Geo SCADA Expert 2019 (All Versions), EcoStruxure Geo SCADA Expert 2020 (All Versions)
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Analysis
by VulDB Data Team • 02/13/2022
This vulnerability represents a critical weakness in the cryptographic validation mechanisms of industrial SCADA systems, specifically affecting ClearSCADA and EcoStruxure Geo SCADA Expert platforms. The flaw resides in the improper validation of SSL/TLS certificates during client-server communications, creating a pathway for malicious actors to execute successful man-in-the-middle attacks. When network traffic between client applications and Geo SCADA database servers is intercepted, attackers can exploit this certificate validation weakness to impersonate legitimate servers and gain unauthorized access to sensitive operational data. The vulnerability stems from CWE-295, which specifically addresses the failure to properly validate certificates, a fundamental security control that should prevent such attacks. This weakness is particularly dangerous in industrial environments where SCADA systems control critical infrastructure operations, as it undermines the entire security posture of these systems.
The technical implementation of this vulnerability allows attackers to perform certificate spoofing attacks by presenting fraudulent certificates that pass the validation checks implemented in the affected software versions. The improper certificate validation occurs at the TLS handshake phase where the client fails to properly verify the certificate chain, issuer information, or domain name matching. This weakness enables attackers to establish secure-looking connections while actually communicating with malicious intermediaries rather than legitimate servers. The impact extends beyond simple data interception to include potential system compromise, data manipulation, and operational disruption. Attackers could leverage this vulnerability to access sensitive operational data, modify control parameters, or even cause physical system disruptions in industrial environments. The vulnerability affects all versions of ClearSCADA and the specified EcoStruxure Geo SCADA Expert releases, indicating a widespread exposure across multiple product lines and potentially affecting numerous industrial facilities worldwide.
The operational consequences of this vulnerability are severe for organizations relying on these SCADA platforms for critical infrastructure management. The man-in-the-middle attack capability allows for persistent surveillance of communications, enabling attackers to gather intelligence about system configurations, operational procedures, and control mechanisms over extended periods. This vulnerability directly impacts the confidentiality, integrity, and availability of industrial control systems, potentially leading to significant financial losses, operational disruptions, and safety hazards. Organizations using these platforms face increased risk of targeted attacks from sophisticated threat actors who understand the value of industrial control system data. The vulnerability also exposes organizations to compliance violations, as proper certificate validation is a fundamental requirement for maintaining secure industrial communication protocols and protecting against recognized attack vectors.
Mitigation strategies for this vulnerability must address both immediate protective measures and long-term architectural improvements. Organizations should implement certificate pinning mechanisms to prevent the acceptance of unauthorized certificates, deploy network monitoring tools to detect anomalous certificate behavior, and establish robust certificate lifecycle management processes. The implementation of proper certificate validation should include verification of certificate chains, proper domain name checking, and validation against trusted certificate authorities. Security controls should also include network segmentation, intrusion detection systems, and regular security assessments to identify potential exploitation attempts. Organizations should consider implementing additional layers of authentication beyond certificate validation, such as multi-factor authentication and privileged access management. The vulnerability highlights the importance of adhering to security standards like those outlined in the NIST SP 800-57 guidelines for cryptographic key management and certificate validation practices. According to ATT&CK framework, this vulnerability maps to techniques involving credential access and defense evasion, emphasizing the need for comprehensive security controls that address both the technical flaw and potential exploitation methods. Regular security updates and patches should be implemented immediately, with organizations conducting thorough risk assessments to determine the full scope of potential exposure across their industrial control systems.