CVE-2024-11792 is a stack-based buffer overflow vulnerability identified in Fuji Electric Monitouch V-SFT version 6.2.3.0, specifically in the parsing logic of V8 files. The root cause is the failure to properly validate the length of user-supplied data before copying it into a fixed-size stack buffer, leading to a classic buffer overflow condition (CWE-121). This flaw can be exploited remotely but requires user interaction, such as opening a maliciously crafted V8 file or visiting a malicious webpage that triggers the vulnerable parser. Successful exploitation allows an attacker to execute arbitrary code with the privileges of the Monitouch V-SFT process, potentially leading to full system compromise. The vulnerability was reported by the Zero Day Initiative (ZDI) under identifier ZDI-CAN-24502 and published on November 27, 2024. The CVSS v3.0 base score is 7.8, indicating high severity with attack vector local (AV:L), low attack complexity (AC:L), no privileges required (PR:N), user interaction required (UI:R), and high impact on confidentiality, integrity, and availability (C:H/I:H/A:H). No patches or known exploits are currently available, but the vulnerability poses a significant risk to industrial control systems relying on Monitouch V-SFT for human-machine interface (HMI) operations.

The vulnerability allows remote attackers to execute arbitrary code on affected systems, which can lead to full compromise of the Monitouch V-SFT process and potentially the underlying host system. This can result in unauthorized control over industrial control system (ICS) operations, data theft, manipulation of critical process parameters, or disruption of availability. Given that Monitouch V-SFT is used in industrial environments, exploitation could have severe operational impacts including safety risks, production downtime, and financial losses. The requirement for user interaction limits mass exploitation but targeted attacks against industrial facilities remain a significant threat. The high impact on confidentiality, integrity, and availability makes this vulnerability critical for organizations relying on this software for process monitoring and control.

1. Apply patches or updates from Fuji Electric as soon as they become available to address the buffer overflow. 2. Until patches are released, implement strict network segmentation to isolate Monitouch V-SFT systems from untrusted networks and limit exposure. 3. Enforce strict file validation policies and restrict the types of files that can be opened by Monitouch V-SFT, especially from untrusted sources. 4. Educate users about the risks of opening files or visiting links from unknown or untrusted origins to reduce the likelihood of user interaction exploitation. 5. Employ application whitelisting and endpoint protection solutions to detect and block suspicious activities related to the Monitouch V-SFT process. 6. Monitor logs and network traffic for anomalous behavior indicative of exploitation attempts. 7. Consider deploying intrusion detection/prevention systems tailored for ICS environments to detect exploit attempts targeting this vulnerability.