CVE-2024-45274: Mbnet.mini Firmware RCE Vulnerability

CVE-2024-45274 Overview

CVE-2024-45274 is a critical vulnerability affecting industrial remote access routers from mbconnectline and Helmholz. The vulnerability allows an unauthenticated remote attacker to execute arbitrary operating system commands via UDP on the affected devices due to missing authentication mechanisms. This represents a severe security flaw in industrial communication equipment commonly deployed in operational technology (OT) environments.

Critical Impact

Unauthenticated attackers can gain complete control of affected industrial routers by executing arbitrary OS commands remotely, potentially compromising entire industrial networks and critical infrastructure.

Affected Products

• mbconnectline mbnet.mini firmware
• mbconnectline mbnet.mini hardware
• Helmholz REX 100 firmware
• Helmholz REX 100 hardware

Discovery Timeline

• October 15, 2024 - CVE-2024-45274 published to NVD
• November 3, 2025 - Last updated in NVD database

Technical Details for CVE-2024-45274

Vulnerability Analysis

This vulnerability is classified as CWE-306: Missing Authentication for Critical Function. The affected industrial routers expose a UDP-based service that accepts and processes commands without requiring any form of authentication. This design flaw allows remote attackers with network access to the device to send malicious UDP packets that are interpreted and executed as operating system commands with elevated privileges.

The lack of authentication on this critical network service means that any attacker who can reach the device's UDP port can immediately execute commands without needing valid credentials. In industrial environments where these devices often provide remote access to control systems, this vulnerability poses an extreme risk to operational continuity and safety.

Root Cause

The root cause of CVE-2024-45274 is the complete absence of authentication controls on a UDP-based command interface. The firmware fails to verify the identity or authorization of incoming requests before processing potentially dangerous commands. This represents a fundamental security design flaw where a network-accessible service with command execution capabilities was implemented without proper access controls.

Attack Vector

The attack vector for this vulnerability is network-based, requiring no user interaction or prior authentication. An attacker with network connectivity to the vulnerable device can craft malicious UDP packets containing operating system commands. These packets are sent to the exposed UDP service, which processes and executes the embedded commands directly on the underlying operating system.

The attack can be conducted remotely from anywhere with network access to the target device. In scenarios where these industrial routers are exposed to the internet or accessible from compromised network segments, attackers can achieve complete device compromise with minimal effort. The command execution occurs in the context of the device's operating system, typically with root or equivalent privileges.

Since no verified code examples are available, organizations should consult the VDE Security Advisory VDE-2024-056 and SySS Security Advisory SYSS-2024-063 for detailed technical information about the exploitation mechanism.

Detection Methods for CVE-2024-45274

Indicators of Compromise

• Unexpected UDP traffic patterns to/from affected industrial router devices
• Anomalous command execution or process spawning on affected devices
• Unauthorized configuration changes or new user accounts on the devices
• Network reconnaissance activity targeting UDP services on industrial equipment

Detection Strategies

• Monitor network traffic for unusual UDP communications with mbconnectline mbnet.mini and Helmholz REX 100 devices
• Implement network intrusion detection rules to identify command injection patterns in UDP payloads
• Deploy network segmentation monitoring to detect lateral movement from compromised industrial network zones
• Utilize industrial control system (ICS) specific monitoring tools to detect unauthorized device interactions

Monitoring Recommendations

• Establish baseline network behavior for all industrial router communications and alert on deviations
• Implement logging at network boundaries to capture all UDP traffic to/from affected devices
• Deploy SentinelOne agents on systems that communicate with industrial networks to detect post-compromise activity
• Configure SIEM rules to correlate alerts from network monitoring with endpoint activity in OT environments

How to Mitigate CVE-2024-45274

Immediate Actions Required

• Isolate affected mbconnectline mbnet.mini and Helmholz REX 100 devices from untrusted networks immediately
• Implement strict network access controls limiting UDP access to affected devices from trusted sources only
• Review network architecture to ensure industrial routers are not directly exposed to the internet
• Conduct an assessment to identify all instances of affected products within the environment

Patch Information

Organizations should consult the vendor security advisories for patched firmware versions. The VDE Security Advisory VDE-2024-056 and VDE Security Advisory VDE-2024-066 contain official remediation guidance from the CERT@VDE. Contact mbconnectline and Helmholz directly for the latest security updates and firmware releases that address this vulnerability.

Workarounds

• Deploy firewall rules to block all UDP traffic to affected devices except from explicitly authorized management stations
• Implement network segmentation to isolate industrial routers in dedicated security zones with strict ingress/egress controls
• Use VPN or other secure tunneling solutions to protect management access to affected devices
• Consider deploying intrusion prevention systems (IPS) at network boundaries to inspect and filter malicious UDP traffic

# Example firewall rule to restrict UDP access (adapt to your environment)
# Block all UDP to affected device except from trusted management IP
iptables -A INPUT -p udp -d <DEVICE_IP> -s <TRUSTED_MGMT_IP> -j ACCEPT
iptables -A INPUT -p udp -d <DEVICE_IP> -j DROP