CVE-2022-4857 in Modbus Poll
Summary
by MITRE • 12/30/2022
A vulnerability was found in Modbus Tools Modbus Poll up to 9.10.0 and classified as critical. Affected by this issue is some unknown functionality of the file mbpoll.exe of the component mbp File Handler. The manipulation leads to buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. VDB-217022 is the identifier assigned to this vulnerability.
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Analysis
by VulDB Data Team • 01/26/2023
The vulnerability identified as CVE-2022-4857 represents a critical buffer overflow flaw within Modbus Tools Modbus Poll software version 9.10.0 and earlier. This security weakness specifically affects the mbpoll.exe executable file within the mbp File Handler component, creating a significant risk for systems that utilize this industrial communication tool. The vulnerability's classification as critical stems from its potential for remote exploitation and the public availability of exploit code, making it immediately actionable by threat actors. The affected software serves industrial environments where Modbus protocol communication is prevalent, making this vulnerability particularly concerning for operational technology infrastructure.
The technical implementation of this buffer overflow vulnerability occurs within the file handling mechanism of the mbp File Handler component. When processing certain malformed or specially crafted input data through the mbpoll.exe executable, the application fails to properly validate buffer boundaries, allowing attackers to overwrite adjacent memory locations. This memory corruption can lead to arbitrary code execution, system crashes, or unauthorized access to the affected system. The vulnerability's remote exploitability means that attackers can trigger the buffer overflow without requiring physical access to the target system, potentially enabling them to execute malicious code on the host machine. The flaw demonstrates poor input validation practices that align with CWE-121, which describes stack-based buffer overflow conditions.
The operational impact of this vulnerability extends significantly within industrial control systems and SCADA environments where Modbus Poll is commonly deployed for network monitoring and protocol analysis. Organizations utilizing this software for industrial network diagnostics face potential compromise of their operational technology infrastructure, as successful exploitation could provide attackers with persistent access to critical systems. The public disclosure of exploit code (VDB-217022) accelerates the risk timeline, as threat actors can immediately implement attacks against unpatched systems. This vulnerability directly impacts the integrity and availability of industrial communication networks, potentially affecting production processes, safety systems, and overall operational continuity.
Mitigation strategies for CVE-2022-4857 require immediate action from affected organizations, including deployment of vendor-provided patches and updates to the Modbus Tools Modbus Poll software. Network segmentation and access controls should be implemented to limit exposure of systems running this vulnerable software, particularly in operational technology environments. Security monitoring should be enhanced to detect potential exploitation attempts through unusual network traffic patterns or system behavior. Organizations should also consider implementing network-based intrusion detection systems to identify and block malicious traffic targeting this specific vulnerability. The remediation process should follow established cybersecurity frameworks such as those outlined in NIST SP 800-80 and ISO 27001, ensuring comprehensive security posture improvement. Regular vulnerability assessments and security audits should be conducted to identify similar weaknesses in industrial control system environments, with particular attention to legacy software components that may not receive regular security updates.