CVE-2025-8633 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-26256.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 08/06/2025
The CVE-2025-8633 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 device's update process where user-supplied input is not properly validated before being utilized in system command execution. The flaw allows attackers with physical access to the device to execute arbitrary code with root privileges, fundamentally compromising the device's security posture. The vulnerability's severity is amplified by the fact that no authentication is required for exploitation, making it particularly dangerous in environments where physical access to devices cannot be strictly controlled. The device operates in a context where firmware updates are critical for maintaining functionality and security, but the update process itself becomes a vector for complete system compromise.
The technical implementation of this vulnerability stems from improper input sanitization during firmware update operations. When the DMX958XR device processes firmware update commands, it fails to validate or sanitize user-provided strings before incorporating them into system calls. This creates an environment where malicious input can be directly interpreted and executed by the underlying operating system. The vulnerability's exploitation occurs through the manipulation of update parameters that are then passed to system functions without proper filtering or escaping mechanisms. Attackers can craft specially formatted update commands that, when processed by the device, result in arbitrary command execution. This type of vulnerability directly aligns with ATT&CK technique T1059.001 for command and scripting interpreter, as it allows for direct execution of system commands through the firmware update interface.
The operational impact of this vulnerability extends beyond simple code execution to encompass complete system compromise and potential network infiltration. An attacker with physical access can leverage this vulnerability to gain root access to the device, potentially enabling them to modify firmware, install backdoors, or use the device as a pivot point for attacking other networked systems. The device's role as a communication endpoint makes it particularly valuable for attackers seeking to establish persistent access or conduct lateral movement within a network. The vulnerability's presence in a device that likely handles sensitive communication data creates additional risks for data confidentiality and integrity. Organizations relying on Kenwood DMX958XR devices for critical communication infrastructure face significant risk if these devices are compromised, as the attack surface expands to include potential data exfiltration, man-in-the-middle attacks, or disruption of communication services.
Mitigation strategies for CVE-2025-8633 must address both immediate remediation and long-term security improvements. The primary recommendation involves applying firmware updates from Kenwood that address the command injection vulnerability through proper input validation and sanitization. Organizations should implement strict access controls to prevent unauthorized physical access to affected devices, including secure enclosures and monitoring systems. Network segmentation and monitoring should be implemented to detect anomalous behavior that might indicate exploitation attempts. The vulnerability highlights the importance of secure coding practices in embedded systems, particularly around input validation and command execution. Security teams should conduct comprehensive vulnerability assessments of all similar devices in their environment to identify potential equivalents of this flaw. Additionally, implementing device integrity checking mechanisms and secure boot processes can provide additional layers of protection against firmware tampering. The ATT&CK framework suggests implementing detection measures for unusual command execution patterns and monitoring for unauthorized firmware modifications as part of a comprehensive defensive strategy.