CVE-2015-6478 in VisiLogic OPLC IDE
Summary
by MITRE
Unitronics VisiLogic OPLC IDE before 9.8.02 does not properly restrict access to ActiveX controls, which allows remote attackers to have an unspecified impact via a crafted web site.
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Analysis
by VulDB Data Team • 03/17/2018
The vulnerability identified as CVE-2015-6478 affects Unitronics VisiLogic OPLC IDE versions prior to 9.8.02, representing a critical security flaw in industrial automation software that bridges the gap between traditional software development environments and operational technology systems. This issue stems from inadequate access controls within the ActiveX component architecture, creating a pathway for remote exploitation that could potentially compromise industrial control systems. The vulnerability resides in the software's handling of ActiveX controls, which are typically used to provide rich user interfaces and extended functionality within web-based environments, but in this case, the implementation fails to enforce proper security boundaries.
The technical flaw manifests through insufficient validation and access restriction mechanisms within the ActiveX controls embedded in the VisiLogic IDE environment. When a malicious website attempts to interact with these controls, the software fails to properly authenticate or authorize the requests, allowing unauthorized code execution or data manipulation. This weakness aligns with CWE-284, which addresses improper access control issues, and represents a classic example of how web-based components can introduce security vulnerabilities into industrial software platforms. The flaw essentially allows attackers to bypass normal security protocols that should prevent unauthorized interaction with critical system components, creating a potential entry point for attackers to gain deeper access to industrial control systems.
The operational impact of this vulnerability extends beyond traditional cybersecurity concerns into the realm of industrial control systems and operational technology environments. Remote attackers could potentially leverage this flaw to execute arbitrary code on systems running vulnerable versions of the VisiLogic IDE, which might lead to unauthorized modifications of control logic, data manipulation, or even system compromise. This represents a significant concern for industrial environments where software integrity and security are paramount, as the compromise of development tools could lead to downstream impacts on production systems. The unspecified impact mentioned in the CVE description suggests that the consequences could vary widely depending on the specific environment and attack vector employed, potentially including complete system takeover or data exfiltration.
Mitigation strategies for CVE-2015-6478 should focus on immediate software updates to version 9.8.02 or later, which contain the necessary security patches to address the ActiveX access control issues. Organizations should also implement network segmentation to limit access to systems running the VisiLogic IDE, particularly in production environments where such vulnerabilities could have severe consequences. Security monitoring should be enhanced to detect unusual network activity or attempts to interact with ActiveX components, and administrators should disable unnecessary ActiveX controls where possible. The vulnerability demonstrates the importance of applying security updates promptly, especially in industrial environments where software vulnerabilities can have cascading effects across operational technology infrastructure. This issue also highlights the need for comprehensive security testing of industrial software components, particularly those that interface with web-based technologies, as outlined in the ATT&CK framework's approach to identifying and mitigating software supply chain vulnerabilities.