CVE-2014-8512 in ProClima
Summary
by MITRE
Buffer overflow in an ActiveX control in Atx45.ocx in Schneider Electric ProClima before 6.1.7 allows remote attackers to execute arbitrary code via unspecified vectors, a different vulnerability than CVE-2014-8511. NOTE: this may be clarified later based on details provided by researchers.
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Analysis
by VulDB Data Team • 06/25/2017
The vulnerability identified as CVE-2014-8512 represents a critical buffer overflow flaw within the ActiveX control component of Schneider Electric ProClima software version 6.1.6 and earlier. This issue resides in the Atx45.ocx library, which serves as a core component for industrial automation and control systems. The buffer overflow vulnerability specifically affects the ActiveX control implementation that enables remote code execution capabilities when exploited by malicious actors. The flaw is particularly concerning within industrial control environments where Schneider Electric products are widely deployed for critical infrastructure management and process control operations. Security researchers initially identified this vulnerability as distinct from CVE-2014-8511, indicating separate attack surfaces and exploitation methods that require different mitigation approaches. The vulnerability's classification under CWE-121 buffer overflow demonstrates the fundamental flaw in memory management where insufficient bounds checking allows attackers to overwrite adjacent memory locations. This particular weakness creates a pathway for attackers to manipulate program execution flow and potentially gain complete system compromise through carefully crafted input data.
The technical exploitation of CVE-2014-8512 occurs through the manipulation of input parameters passed to the vulnerable ActiveX control within the Atx45.ocx library. Attackers can trigger the buffer overflow by sending specially crafted data through web browsers or other applications that invoke the ActiveX control, which then executes the overflow condition during normal operation. The vulnerability's remote exploitability means that attackers do not require physical access to the target system, making it particularly dangerous in networked industrial environments. The attack vector typically involves web-based delivery mechanisms where malicious websites or email attachments can trigger the vulnerable ActiveX control when users browse to compromised sites or open malicious documents. The specific nature of the buffer overflow allows attackers to overwrite return addresses, function pointers, or other critical memory structures, enabling arbitrary code execution with the privileges of the affected application. This exploitation technique aligns with ATT&CK framework tactics including T1203 Exploitation for Client Execution and T1059 Command and Scripting Interpreter, as attackers can leverage the vulnerability to execute malicious payloads directly on target systems.
The operational impact of CVE-2014-8512 extends far beyond typical enterprise security concerns due to the industrial nature of Schneider Electric ProClima systems. These products are commonly deployed in critical infrastructure sectors including power generation, water treatment, manufacturing facilities, and other industrial environments where system reliability and security are paramount. The potential for remote code execution in such environments could lead to severe consequences including operational disruption, data compromise, and even physical safety hazards. Industrial control systems often operate with limited security updates and may lack the robust network segmentation found in traditional enterprise environments, making these systems particularly vulnerable to exploitation. The vulnerability affects not only the immediate target system but could potentially enable attackers to move laterally through industrial networks, compromising multiple interconnected systems. Organizations using Schneider Electric ProClima software in production environments face significant risk of unauthorized access and system compromise, which could result in production downtime, regulatory compliance violations, and potential safety incidents. The vulnerability's impact is amplified by the fact that many industrial environments lack comprehensive security monitoring and incident response capabilities that would typically be found in enterprise networks.
Mitigation strategies for CVE-2014-8512 require a multi-layered approach combining immediate patching, network segmentation, and application control measures. The most effective solution involves applying the official patch released by Schneider Electric for ProClima version 6.1.7 and later, which addresses the buffer overflow vulnerability in the Atx45.ocx ActiveX control. Organizations should implement strict application whitelisting policies that prevent execution of untrusted ActiveX controls, particularly those from unknown or unverified sources. Network segmentation should be implemented to isolate industrial control systems from general enterprise networks, reducing the attack surface available to potential attackers. Browser security configurations should be hardened by disabling ActiveX controls in web browsers or implementing strict security zones that prevent automatic execution of potentially malicious ActiveX components. Security monitoring should be enhanced to detect unusual network traffic patterns or suspicious activities that might indicate exploitation attempts. Additionally, organizations should conduct comprehensive vulnerability assessments of their industrial control systems to identify other potential attack vectors and ensure that all related components are updated and properly secured. The mitigation approach should align with NIST Cybersecurity Framework guidelines and incorporate regular security assessments to maintain protection against evolving threats targeting industrial control systems.