CVE-2018-14792 in PLC Editor
Summary
by MITRE
WECON PLC Editor version 1.3.3U may allow an attacker to execute code under the current process when processing project files.
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Analysis
by VulDB Data Team • 03/25/2020
The vulnerability identified as CVE-2018-14792 affects WECON PLC Editor version 1.3.3U, representing a critical code execution flaw that can be exploited through malicious project file manipulation. This vulnerability resides within the software's file processing capabilities and demonstrates a classic buffer overflow or improper input validation issue that allows attackers to gain arbitrary code execution privileges. The flaw specifically manifests when the application processes project files, suggesting that the software fails to properly validate or sanitize input data before parsing. Such vulnerabilities are particularly dangerous in industrial control environments where PLC editors are commonly used for programming and configuration of programmable logic controllers. The security implications extend beyond simple code execution as they can potentially compromise entire industrial control systems and operational technology networks.
The technical nature of this vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and CWE-122, which covers heap-based buffer overflow scenarios. These classifications indicate that the flaw likely involves improper bounds checking during memory allocation or data processing operations within the project file parser. The attack vector requires an attacker to convince a victim to open a maliciously crafted project file, which then triggers the vulnerable code path during file processing. This approach represents a common social engineering tactic combined with software exploitation, making it particularly insidious in operational technology environments where users may not be security-aware. The vulnerability's impact is amplified in industrial settings where PLC editors are integral to control system configuration and where unauthorized code execution could lead to system compromise, process disruption, or safety hazards.
From an operational perspective, this vulnerability presents significant risks to industrial control system security and can be leveraged by attackers to establish persistent access within critical infrastructure environments. The exploitation of this flaw could enable attackers to modify PLC programs, alter control logic, or even cause physical damage to industrial processes through malicious code injection. The vulnerability's presence in a PLC editor application means that successful exploitation could potentially affect multiple systems within an organization's operational technology infrastructure, as PLC editors are often used to configure and deploy control logic across various industrial processes. Organizations utilizing WECON PLC Editor version 1.3.3U face a substantial risk of compromise, particularly in environments where physical security is not adequately separated from network security. The attack surface is further expanded by the fact that these editors are commonly used in manufacturing, process control, and other critical infrastructure sectors where the consequences of unauthorized system access can be severe.
Mitigation strategies for CVE-2018-14792 should include immediate software updates and patches from the vendor, as well as network segmentation to limit access to PLC editor applications. Organizations should implement strict file validation procedures and user access controls to prevent unauthorized project file modifications. The mitigation approach should align with ATT&CK technique T1059.007 for command and script interpreter usage, as attackers may attempt to leverage the code execution capability for further system compromise. Additionally, organizations should conduct regular vulnerability assessments of their industrial control systems and implement proper incident response procedures to detect and respond to potential exploitation attempts. Network monitoring should be enhanced to detect unusual file processing activities or unauthorized access patterns that might indicate exploitation attempts. The vulnerability underscores the importance of maintaining up-to-date industrial control system software and implementing robust security practices throughout the operational technology lifecycle.