CVE-2022-32137 in CODESYS
Summary
by MITRE • 06/24/2022
In multiple CODESYS products, a low privileged remote attacker may craft a request, which may cause a heap-based buffer overflow, resulting in a denial-of-service condition or memory overwrite. User interaction is not required.
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Analysis
by VulDB Data Team • 07/14/2022
The vulnerability identified as CVE-2022-32137 affects multiple CODESYS products, representing a critical heap-based buffer overflow flaw that can be exploited by low privileged remote attackers without requiring user interaction. This vulnerability resides within the software's request processing mechanisms and demonstrates the dangerous potential for remote code execution through memory corruption. The affected CODESYS products are widely used in industrial automation and control systems, making this vulnerability particularly concerning for operational technology environments. The heap-based nature of the buffer overflow indicates that the vulnerability occurs when the application attempts to write data beyond the allocated heap memory boundaries, potentially allowing attackers to overwrite adjacent memory locations and corrupt program execution flow.
The technical implementation of this vulnerability stems from inadequate input validation within the request handling components of CODESYS software. Attackers can craft malicious requests that deliberately exceed buffer size limitations, causing memory corruption in the heap allocation regions. This type of vulnerability falls under CWE-121, which specifically addresses stack-based buffer overflow conditions, though the heap-based nature makes it more complex to exploit and potentially more dangerous. The absence of user interaction requirements means that attackers can exploit this vulnerability through automated scanning and attack tools without needing to engage with the system through legitimate user interfaces. The vulnerability's impact extends beyond simple denial-of-service conditions, as memory overwrite capabilities can potentially lead to arbitrary code execution, making it a significant concern for industrial control systems that require high availability and security.
From an operational standpoint, this vulnerability presents substantial risks to organizations utilizing CODESYS products in critical infrastructure environments. The remote exploitability means that attackers can target these systems from external networks without requiring physical access or elevated privileges, potentially leading to widespread service disruption or unauthorized system control. The vulnerability affects industrial automation systems where CODESYS is commonly deployed, including manufacturing environments, energy control systems, and other operational technology applications that require robust security measures. Organizations relying on these products face potential operational disruptions that could result in production downtime, safety hazards, or data integrity issues. The vulnerability's severity is amplified by its low privilege requirements, as attackers need only basic network access to potentially compromise systems, making it particularly attractive to threat actors targeting industrial control systems.
Mitigation strategies for CVE-2022-32137 should prioritize immediate patch management and network segmentation measures to reduce attack surface exposure. Organizations should implement network access controls to restrict remote access to CODESYS systems and deploy intrusion detection systems to monitor for suspicious network traffic patterns associated with buffer overflow exploitation attempts. The vulnerability's classification under ATT&CK technique T1203, which covers "Exploitation for Client Execution," highlights the need for defensive measures that can detect and prevent such exploitation patterns. Regular security assessments and vulnerability scanning should be conducted to identify systems running affected CODESYS versions, while maintaining updated threat intelligence feeds to monitor for exploitation attempts. System hardening practices including disabling unnecessary services, implementing least privilege access controls, and deploying application whitelisting solutions can further reduce the risk of successful exploitation. Additionally, organizations should establish incident response procedures specifically tailored to address heap-based buffer overflow vulnerabilities in industrial control systems, ensuring that security teams are prepared to respond to potential exploitation attempts and maintain operational continuity during remediation activities.