CVE-2021-34559 in WirelessHART-Gateway
Summary
by MITRE • 08/31/2021
In PEPPERL+FUCHS WirelessHART-Gateway
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Analysis
by VulDB Data Team • 09/03/2021
The PEPPERL+FUCHS WirelessHART-Gateway vulnerability identified as CVE-2021-34559 represents a critical security flaw that undermines the integrity and confidentiality of industrial wireless communication systems. This gateway device serves as a crucial bridge between wireless sensor networks and industrial control systems, making it a prime target for adversaries seeking to compromise industrial operations. The vulnerability stems from inadequate input validation and authentication mechanisms within the device's wireless communication protocols, creating potential entry points for malicious actors to infiltrate industrial networks.
The technical implementation of this vulnerability manifests through insufficient sanitization of user inputs and improper access controls within the gateway's firmware. Attackers can exploit this weakness to execute unauthorized commands or manipulate wireless communication parameters, potentially leading to data corruption or complete system compromise. The flaw specifically affects the device's handling of wireless protocol messages and configuration parameters, where malformed inputs can trigger unexpected behavior in the underlying software stack. This issue aligns with CWE-20, which addresses improper input validation, and represents a classic example of how industrial IoT devices often lack robust security measures compared to traditional IT infrastructure.
The operational impact of this vulnerability extends beyond simple network compromise, as it directly threatens the reliability and safety of industrial processes that depend on WirelessHART networks. When exploited, the vulnerability can enable attackers to disrupt communication between field devices and control systems, potentially causing production halts, safety incidents, or data breaches. The gateway's role as a central communication hub means that a successful exploitation could affect multiple connected devices simultaneously, amplifying the potential damage. This threat vector aligns with ATT&CK technique T1071.004, which covers application layer protocol manipulation, and represents a significant risk to industrial control system security.
Organizations utilizing PEPPERL+FUCHS WirelessHART-Gateway devices should implement immediate mitigation strategies including firmware updates from the vendor, network segmentation to isolate critical industrial assets, and enhanced monitoring of wireless communication traffic. The vulnerability underscores the importance of secure-by-design principles in industrial IoT deployments and highlights the need for comprehensive security assessments of industrial communication infrastructure. Network administrators should also consider implementing intrusion detection systems specifically configured to monitor for unusual wireless protocol behavior that might indicate exploitation attempts. The incident serves as a reminder that industrial control systems require specialized security approaches that account for both traditional IT threats and unique industrial operational requirements.