CVE-2024-47134 in Kostac PLC Programming Software
Summary
by MITRE • 10/03/2024
Out-of-bounds write vulnerability exists in Kostac PLC Programming Software (Former name: Koyo PLC Programming Software) Version 1.6.14.0 and earlier. Having a user open a specially crafted project file which was saved using Kostac PLC Programming Software Version 1.6.9.0 and earlier may cause a denial-of-service (DoS) condition, arbitrary code execution, and/or information disclosure because the issues exist in parsing of KPP project files.
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Analysis
by VulDB Data Team • 03/08/2025
The CVE-2024-47134 vulnerability represents a critical out-of-bounds write flaw in Kostac PLC Programming Software, formerly known as Koyo PLC Programming Software, affecting versions 1.6.14.0 and earlier. This vulnerability arises from improper handling of KPP project file parsing operations, creating a dangerous condition where maliciously crafted project files can trigger severe system consequences. The flaw specifically manifests when the software processes project files created with earlier versions of the same software, particularly version 1.6.9.0 and earlier, establishing a clear attack vector through file manipulation.
The technical implementation of this vulnerability stems from inadequate bounds checking during the parsing of KPP project files, which constitutes a classic software flaw categorized under CWE-787 Out-of-bounds Write. When the vulnerable software encounters a specially crafted project file, it fails to properly validate the size or structure of data elements within the file, leading to memory corruption that can result in multiple security outcomes. The parsing mechanism does not adequately verify array indices or buffer limits, allowing attackers to manipulate file contents in ways that exceed allocated memory boundaries.
The operational impact of this vulnerability extends beyond simple denial-of-service conditions to encompass arbitrary code execution and information disclosure capabilities, making it particularly dangerous in industrial control environments. Attackers exploiting this vulnerability could potentially gain unauthorized access to systems, execute malicious code with the privileges of the affected application, or extract sensitive information from memory locations. This makes the vulnerability especially concerning for operational technology environments where PLC software controls critical infrastructure systems and where the consequences of system compromise could be severe.
From a threat modeling perspective, this vulnerability aligns with ATT&CK techniques related to initial access through malicious file delivery and privilege escalation via memory corruption exploits. The attack surface is limited to users who open project files, making social engineering or supply chain compromise potential attack vectors. Organizations using Kostac PLC Programming Software should prioritize immediate patching of affected versions, as the vulnerability's potential for arbitrary code execution makes it a high-priority target for exploitation in industrial control system environments. The vulnerability demonstrates the critical importance of input validation and bounds checking in software that handles user-provided data, particularly in safety-critical industrial applications where software reliability directly impacts operational safety and security.
The remediation strategy should include immediate deployment of patches from the vendor, implementation of file validation procedures, and network segmentation to limit potential attack vectors. Additionally, organizations should consider implementing application whitelisting policies and regular security assessments of industrial control system software to prevent similar vulnerabilities from being exploited in operational environments.