CVE-2018-12635 in Scada
Summary
by MITRE
CirCarLife Scada v4.2.4 allows unauthorized upgrades via requests to the html/upgrade.html and services/system/firmware.upgrade URIs.
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Analysis
by VulDB Data Team • 02/21/2020
The CirCarLife Scada v4.2.4 vulnerability represents a critical security flaw that undermines the integrity and authenticity of firmware upgrade processes within industrial control systems. This vulnerability specifically affects the web-based management interface of the CirCarLife SCADA platform, which is commonly deployed in industrial environments for monitoring and control operations. The issue stems from insufficient authentication mechanisms and access controls that allow any remote attacker to initiate firmware upgrade procedures without proper authorization. The affected URIs html/upgrade.html and services/system/firmware.upgrade expose functionality that should be restricted to authorized administrators, creating a significant attack surface that adversaries can exploit to compromise system integrity.
The technical implementation of this vulnerability demonstrates a classic lack of input validation and authentication checks within the web application framework. When requests are made to the designated upgrade endpoints, the system fails to verify the credentials or authorization status of the requesting entity. This authentication bypass allows attackers to upload and execute arbitrary firmware images, potentially leading to complete system compromise. The vulnerability is particularly concerning because it operates at the system level rather than merely affecting user interface components, meaning that successful exploitation could result in persistent backdoor access or complete operational disruption. From a cybersecurity perspective, this flaw aligns with CWE-287 which addresses improper authentication issues, and represents a direct violation of the principle of least privilege that should govern all system interfaces.
The operational impact of this vulnerability extends far beyond simple unauthorized access, as it fundamentally compromises the security posture of industrial control environments. In manufacturing and critical infrastructure settings where CirCarLife Scada systems are deployed, unauthorized firmware upgrades can lead to production downtime, data corruption, or even physical safety hazards if control systems are compromised. Attackers could potentially install malicious firmware that alters system behavior, creates persistent access points, or disrupt operational processes. The vulnerability also enables lateral movement within network environments, as compromised SCADA systems often serve as central points of control for industrial operations. This aligns with ATT&CK technique T1072 which covers software deployment methods and T1566 which covers credential harvesting through various attack vectors.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term security hardening measures. Organizations should immediately apply vendor patches or updates if available, and implement network segmentation to isolate SCADA systems from general corporate networks. Access controls should be strengthened through proper authentication mechanisms, including multi-factor authentication for administrative interfaces. Network monitoring should be enhanced to detect unusual traffic patterns associated with firmware upgrade activities, and regular security audits should verify that only authorized personnel can access upgrade endpoints. The vulnerability also highlights the importance of secure software development practices and regular penetration testing of industrial control systems. Organizations should consider implementing device authentication protocols and certificate-based access controls to prevent unauthorized firmware modifications. Additionally, maintaining detailed audit logs of all upgrade activities and implementing network access controls that restrict direct access to upgrade endpoints can significantly reduce the risk of exploitation.