CVE-2025-8642 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-26265.
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Analysis
by VulDB Data Team • 08/06/2025
The CVE-2025-8642 vulnerability represents a critical command injection flaw within the firmware update functionality of Kenwood DMX958XR devices, constituting a severe security weakness that undermines the operational integrity of these communication systems. This vulnerability specifically targets the firmware update process where insufficient input validation permits malicious command execution, creating a pathway for unauthorized code injection that operates with the highest possible privileges. The flaw exists within the device's update mechanism, where user-supplied strings are directly incorporated into system calls without adequate sanitization or validation procedures. The absence of authentication requirements for exploitation means that any individual with physical access to the device can leverage this vulnerability, significantly expanding the potential attack surface beyond traditional network-based threats. This type of vulnerability falls under the CWE-77 category, specifically addressing command injection flaws where untrusted data is used in command construction without proper validation or sanitization. The security implications extend beyond simple code execution to encompass complete system compromise, as the vulnerability allows execution in the root context, providing attackers with unrestricted access to all system resources and capabilities.
The operational impact of this vulnerability presents a substantial risk to organizations relying on Kenwood DMX958XR devices for critical communication infrastructure, particularly in environments where physical security controls may be insufficient or compromised. Attackers exploiting this vulnerability can execute arbitrary code with root privileges, potentially leading to complete system takeover, data exfiltration, or disruption of communication services. The physical presence requirement does not mitigate the threat level, as many organizations may not adequately secure their physical access points or may have personnel with legitimate access who could become compromised. This vulnerability directly maps to ATT&CK technique T1059.001, which encompasses command and scripting interpreter execution, and T1068, which addresses exploit for privilege escalation. The attack vector leverages the device's legitimate firmware update functionality, making it particularly dangerous as it operates within expected system behavior, potentially evading traditional security monitoring and detection mechanisms. Organizations utilizing these devices face potential exposure to supply chain attacks, insider threats, or unauthorized physical access scenarios that could result in complete system compromise.
Mitigation strategies for CVE-2025-8642 must address both immediate remediation and long-term security posture improvements to protect against this critical vulnerability. The primary recommendation involves applying the vendor-provided firmware update or security patch that addresses the command injection flaw in the firmware update process, ensuring proper input validation and sanitization of user-supplied strings before system call execution. Organizations should implement strict physical security controls around devices, including restricted access areas, access logs, and monitoring of physical entry points to prevent unauthorized individuals from exploiting this vulnerability. Network segmentation and monitoring should be enhanced to detect unusual firmware update activities or command execution patterns that could indicate exploitation attempts. Security teams should conduct comprehensive vulnerability assessments of all Kenwood DMX958XR devices within their environments, implementing continuous monitoring for signs of compromise or unauthorized firmware modifications. The mitigation approach aligns with NIST cybersecurity framework principles, particularly in the protection of system components and implementation of security controls that address both technical and physical access controls. Additional defensive measures include disabling unnecessary firmware update capabilities when not actively required, implementing device authentication mechanisms, and establishing robust incident response procedures specifically designed to handle physical security breaches and command injection exploits. Regular security assessments and penetration testing should be conducted to verify the effectiveness of implemented controls and identify potential additional vulnerabilities within the device ecosystem.