CVE-2025-8635 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-26258.
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Analysis
by VulDB Data Team • 08/06/2025
The CVE-2025-8635 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 exists within the firmware update process where the system fails to properly validate user-supplied input before incorporating it into system calls. The flaw allows for arbitrary code execution with root privileges, making it particularly dangerous for networked audio equipment systems that require high levels of security and reliability. The vulnerability's severity is amplified by the fact that it requires no authentication, meaning any physically present attacker can exploit it without prior access credentials.
The technical implementation of this vulnerability stems from insufficient input validation during firmware update operations, creating an environment where attacker-controlled data can be directly executed as system commands. When a user attempts to update firmware, the device processes input parameters without adequate sanitization or validation, allowing malicious payloads to be interpreted and executed by the underlying operating system. This type of vulnerability aligns with ATT&CK technique T1059.001 for command and scripting interpreter and T1068 for exploit for privilege escalation. The attack surface is particularly concerning for audio mixing consoles and professional audio equipment where unauthorized code execution could disrupt critical operations or provide attackers with complete system control.
The operational impact of this vulnerability extends beyond simple code execution to encompass complete system compromise and potential business disruption. Attackers with physical access to the DMX958XR device can leverage this vulnerability to gain root-level privileges, potentially leading to persistent backdoors, data exfiltration, or system-wide disruption. The vulnerability affects organizations using professional audio equipment in broadcast environments, concert venues, and corporate settings where audio systems are critical infrastructure components. This weakness particularly impacts the availability and integrity of audio systems, as attackers could potentially cause system crashes, modify audio processing configurations, or gain unauthorized access to connected network infrastructure.
Mitigation strategies for CVE-2025-8635 should focus on immediate firmware updates from Kenwood, implementing physical security controls to limit access to affected devices, and establishing network segmentation to prevent lateral movement. Organizations should also implement monitoring for unusual firmware update activities and establish secure firmware update procedures that validate all input parameters. The vulnerability highlights the importance of secure coding practices and input validation in embedded systems, particularly for devices that operate in professional environments where security and reliability are paramount. Network administrators should consider implementing device access controls and regular security assessments to identify similar vulnerabilities in other embedded systems within their infrastructure.