CVE-2025-8634 in DMX958XR
Summary
by MITRE • 08/06/2025
Kenwood DMX958XR Firmware Update Command Injection Vulnerability. This vulnerability allows physically present attackers to execute arbitrary code on affected installations of Kenwood DMX958XR devices. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the firmware update process. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-26257.
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Analysis
by VulDB Data Team • 08/06/2025
The CVE-2025-8634 vulnerability represents a critical command injection flaw in the Kenwood DMX958XR device firmware update mechanism, classified under CWE-77 as improper neutralization of special elements used in a command. This vulnerability resides in the firmware update process where the system fails to properly validate user-supplied input before executing system calls, creating a pathway for arbitrary code execution. The flaw is particularly concerning because it requires no authentication to exploit, making it accessible to any attacker with physical presence to the device. The vulnerability exists in the firmware update component where the system directly incorporates user-provided strings into system commands without adequate sanitization or validation, allowing attackers to inject malicious commands that execute with root privileges.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with complete system control through the root context. This level of privilege allows for persistent access, system modification, and potential lateral movement within networks where the device resides. The vulnerability's accessibility through physical presence means that attackers with minimal technical expertise can compromise the device, as demonstrated by the ZDI-CAN-26257 tracking reference which indicates this flaw was recognized and catalogued by the Zero Day Initiative. Attackers could leverage this vulnerability to install backdoors, modify device configurations, or use the compromised device as a pivot point for attacking other networked systems. The attack surface is particularly significant for devices like the DMX958XR which may serve as network access points or communication hubs in professional audiovisual environments.
Mitigation strategies for this vulnerability should focus on immediate firmware updates from Kenwood, as the manufacturer would have likely released patches addressing the input validation gap. Organizations should implement strict physical security measures to prevent unauthorized access to the affected devices, particularly in environments where such access could lead to broader network compromise. Network segmentation and monitoring should be enhanced to detect unusual command execution patterns or unauthorized firmware modifications. The vulnerability aligns with ATT&CK technique T1059.001 for command and scripting interpreter, where adversaries execute commands through system interfaces. Additionally, implementing input validation controls and employing principle of least privilege for firmware update processes would provide defense in depth. Security professionals should also consider deploying network intrusion detection systems capable of identifying malicious command injection patterns and establishing baseline monitoring for firmware modification activities on critical devices.