CVE-2024-39880 in CNCSoft-G2
Summary
by MITRE • 07/10/2024
Delta Electronics CNCSoft-G2 lacks proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. If a target visits a malicious page or opens a malicious file an attacker can leverage this vulnerability to execute code in the context of the current process.
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Analysis
by VulDB Data Team • 03/20/2025
The vulnerability identified as CVE-2024-39880 affects Delta Electronics CNCSoft-G2 software, representing a classic buffer overflow condition that arises from insufficient input validation mechanisms. This flaw exists within the software's handling of user-supplied data where the application fails to properly validate the length of incoming data before copying it into a fixed-length stack-based buffer. The vulnerability is particularly concerning as it occurs in a commercial software solution used for computer numerical control operations in manufacturing environments, making it a potential target for sophisticated attacks targeting industrial control systems.
The technical implementation of this vulnerability stems from a fundamental programming error where the application does not enforce bounds checking on user input before performing memory operations. When user-supplied data exceeds the predetermined buffer size, it overflows into adjacent memory locations, potentially corrupting critical program state information including return addresses and function pointers. This type of vulnerability is categorized under CWE-121 as a stack-based buffer overflow, which directly aligns with common attack patterns documented in the ATT&CK framework under technique T1059.007 for command and scripting interpreter and T1203 for Exploitation for Client Execution. The flaw creates an ideal environment for attackers to manipulate program execution flow through controlled input data that exceeds buffer boundaries.
The operational impact of this vulnerability extends beyond simple code execution as it provides attackers with the capability to operate within the security context of the currently running process, potentially escalating privileges or accessing sensitive system resources. When a target visits a malicious webpage or opens a malicious file, the attacker can leverage this vulnerability to achieve remote code execution without requiring elevated privileges. This makes the attack vector particularly dangerous in industrial environments where CNC software operates with high-privilege accounts and may have direct access to critical manufacturing processes. The vulnerability's exploitation can result in unauthorized modification of production parameters, complete system compromise, or disruption of critical manufacturing operations, making it a significant concern for industrial cybersecurity posture.
Mitigation strategies for this vulnerability should focus on immediate software updates from Delta Electronics, which should include proper bounds checking mechanisms and input validation routines. Organizations should implement network segmentation to limit access to CNC systems and deploy intrusion detection systems to monitor for suspicious network activity. Additionally, application whitelisting controls can prevent unauthorized execution of malicious payloads, while regular security assessments should verify that all input handling routines properly validate data length before memory operations. The vulnerability highlights the importance of secure coding practices and adherence to industry standards such as those defined in the CWE dictionary and NIST guidelines for industrial control system security, emphasizing that proper input validation is fundamental to preventing buffer overflow exploits that can lead to complete system compromise.