CVE-2006-2707 in C5 Enterprise Vulnerability Management
Summary
by MITRE
Secure Elements Class 5 AVR server (aka C5 EVM) before 2.8.1 does not validate the peer certificate when obtaining an update, which could allow remote attackers to distribute malicious updates to clients.
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Analysis
by VulDB Data Team • 11/24/2024
The vulnerability identified as CVE-2006-2707 affects the Secure Elements Class 5 AVR server, also known as the C5 EVM platform, specifically versions prior to 2.8.1. This represents a critical security flaw in the update mechanism of industrial control systems that are widely deployed in critical infrastructure environments. The affected system operates within the realm of embedded security devices that manage sensitive operational technology infrastructure, making this vulnerability particularly concerning for organizations relying on industrial control systems for their operations.
The technical flaw resides in the certificate validation process during the update procedure. The system fails to properly validate peer certificates when establishing secure communication for software updates, creating a path for man-in-the-middle attacks. This weakness directly violates fundamental principles of secure communication protocols and cryptographic verification. The absence of certificate validation means that any remote attacker who can intercept network traffic between the update server and client devices can potentially substitute legitimate update packages with malicious ones without detection. This vulnerability falls under the CWE-295 category of "Improper Certificate Validation" and represents a classic example of how weak authentication mechanisms can compromise entire systems. The flaw specifically enables attackers to perform unauthorized software distribution, which can lead to complete system compromise and operational disruption.
The operational impact of this vulnerability extends far beyond simple software corruption, as it fundamentally undermines the integrity and security of industrial control systems. Organizations using affected C5 EVM platforms face significant risks including unauthorized access to critical infrastructure, potential system compromise, and disruption of essential services. The vulnerability enables attackers to deploy malware or backdoors through legitimate update channels, making detection extremely difficult and potentially allowing long-term persistence within target networks. This type of attack vector aligns with tactics described in the MITRE ATT&CK framework under the "Execution" and "Persistence" domains, where adversaries leverage legitimate system processes to establish malicious presence. The risk is particularly severe in industrial environments where system integrity is paramount, as malicious updates could potentially cause physical damage to equipment or disrupt critical operations.
Mitigation strategies for this vulnerability require immediate attention and comprehensive implementation across affected systems. Organizations should upgrade to version 2.8.1 or later of the Secure Elements Class 5 AVR server software to receive the patched certificate validation functionality. Network segmentation and monitoring should be implemented to detect unauthorized update activities and potential man-in-the-middle attacks. Additional security controls including network access controls, intrusion detection systems, and regular security audits should be deployed to monitor for suspicious update activities. The vulnerability demonstrates the importance of proper certificate validation in secure update mechanisms and highlights the need for robust cryptographic practices in industrial control systems. Organizations should also implement strict change management procedures for software updates and maintain detailed logs of all update activities to enable rapid detection of potential compromise. Given the age of this vulnerability, organizations should also consider the broader security posture of their industrial control systems and implement additional layers of defense to protect against similar weaknesses in other components of their infrastructure.