CVE-2020-15065 in DA-70254
Summary
by MITRE
DIGITUS DA-70254 4-Port Gigabit Network Hub 2.073.000.E0008 devices allow an attacker on the same network to denial-of-service the device via long input values.
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Analysis
by VulDB Data Team • 08/08/2020
The DIGITUS DA-70254 4-Port Gigabit Network Hub represents a network infrastructure device that serves as a central connectivity point for local area networks. This particular model version 2.073.000.E0008 contains a critical vulnerability that allows remote attackers within the same network segment to induce a denial-of-service condition on the device. The vulnerability stems from insufficient input validation mechanisms within the hub's firmware, specifically affecting how the device processes incoming network traffic and configuration parameters.
The technical flaw manifests when an attacker submits excessively long input values to the hub's management interfaces or network processing components. This condition falls under the Common Weakness Enumeration category of insufficient input validation, which is classified as CWE-20. The device fails to properly sanitize or limit the length of input parameters, allowing maliciously crafted data to overwhelm the system's processing capabilities. When the hub encounters these long input values, it cannot properly handle the data structures, leading to system instability and eventual service disruption. The vulnerability is particularly concerning because it requires minimal privileges to exploit, as the attacker only needs network access to the same broadcast domain as the target device.
The operational impact of this vulnerability extends beyond simple service interruption, as network hubs serve as critical infrastructure components in many environments. When compromised, these devices can cause widespread network disruption affecting multiple connected systems and applications. Organizations relying on such network infrastructure may experience cascading failures as dependent services lose connectivity. The vulnerability is classified under the MITRE ATT&CK framework as part of the privilege escalation and denial-of-service tactics, where an attacker can leverage the device's network position to cause network-wide disruption without requiring elevated privileges. This makes the vulnerability particularly attractive to threat actors seeking to cause maximum disruption with minimal effort.
Mitigation strategies for this vulnerability should include immediate firmware updates from the manufacturer, which would address the input validation shortcomings. Network segmentation through proper firewall rules and access control lists can help limit the attack surface by preventing unauthorized access to the hub's management interfaces. Additionally, implementing network monitoring solutions can help detect anomalous traffic patterns that may indicate exploitation attempts. Organizations should also consider disabling unnecessary management protocols and services on the device to reduce potential attack vectors. The vulnerability highlights the importance of secure firmware development practices and proper input validation in network infrastructure devices, as outlined in various cybersecurity frameworks including NIST SP 800-30 and ISO 27001 standards for information security management.