CVE-2013-3075 in Mitsubishi MX Component
Summary
by MITRE
Multiple buffer overflows in ActUWzd.dll 1.0.0.1 in Mitsubishi MX Component 3, as distributed in Citect CitectFacilities 7.10 and CitectScada 7.10r1, allow remote attackers to execute arbitrary code via a long string, as demonstrated by a long WzTitle property value to a certain ActiveX control.
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Analysis
by VulDB Data Team • 06/29/2025
The vulnerability identified as CVE-2013-3075 represents a critical buffer overflow condition within the ActUWzd.dll ActiveX control component of Mitsubishi MX Component 3. This flaw exists in the Citect CitectFacilities 7.10 and CitectScada 7.10r1 software suites, creating a significant security risk for industrial control systems that rely on these components for operational functionality. The vulnerability specifically affects the handling of the WzTitle property within the ActiveX control, where insufficient input validation allows attackers to inject excessive data that overflows allocated memory buffers. This particular implementation flaw demonstrates poor memory management practices and inadequate bounds checking mechanisms that are fundamental requirements for secure software development.
The technical exploitation of this vulnerability occurs through the manipulation of the WzTitle property value in the ActiveX control, which serves as the primary attack vector for remote code execution. When a maliciously crafted long string is passed to this property, it exceeds the allocated buffer space within ActUWzd.dll, causing memory corruption that can be leveraged by attackers to overwrite critical memory locations. This buffer overflow condition falls under CWE-121, which specifically addresses stack-based buffer overflow vulnerabilities, and more broadly aligns with CWE-787, representing out-of-bounds write conditions that can lead to arbitrary code execution. The vulnerability's remote exploitability means that attackers do not require physical access to the target system, making it particularly dangerous for industrial environments where network connectivity is essential.
From an operational perspective, this vulnerability poses severe risks to industrial control systems that utilize Citect software for facility management and SCADA operations. The remote code execution capability allows attackers to gain full control over affected systems, potentially leading to unauthorized access to critical infrastructure, data manipulation, and operational disruption. The impact extends beyond simple system compromise as attackers could potentially cause physical damage to industrial processes, manipulate safety systems, or disrupt essential services. Organizations relying on CitectScada and CitectFacilities for operational technology environments face significant exposure, particularly given the widespread adoption of these platforms in critical infrastructure sectors such as manufacturing, energy, and utilities. The vulnerability's exploitation can result in cascading effects throughout industrial networks, potentially compromising multiple interconnected systems.
The mitigation strategies for CVE-2013-3075 should prioritize immediate patching of affected systems with vendor-provided updates and security fixes. Organizations must implement network segmentation and access controls to limit exposure of vulnerable ActiveX components to untrusted networks. Security monitoring should focus on detecting unusual ActiveX control usage patterns and potential exploitation attempts through network traffic analysis. Additionally, implementing application whitelisting policies can prevent execution of untrusted ActiveX controls, while regular security assessments should verify the absence of vulnerable components. The vulnerability aligns with several ATT&CK techniques including T1059 for command and script interpreter usage and T1068 for exploit for privilege escalation, making comprehensive threat hunting necessary for organizations that cannot immediately patch their systems. Organizations should also consider implementing defense-in-depth strategies that include disabling unnecessary ActiveX controls and maintaining up-to-date threat intelligence to identify potential exploitation attempts.