CVE-2020-27282 in T1-Ventilator
Summary
by MITRE • 03/16/2021
In Hamilton Medical AG,T1-Ventillator versions 2.2.3 and prior, an XML validation vulnerability in the ventilator allows privileged attackers with physical access to render the device persistently unusable by uploading specially crafted configuration files.
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Analysis
by VulDB Data Team • 05/21/2021
The vulnerability identified as CVE-2020-27282 affects Hamilton Medical AG T1-Ventillator devices running firmware versions 2.2.3 and earlier, representing a critical security flaw that undermines the integrity and availability of medical respiratory equipment. This vulnerability stems from insufficient XML validation mechanisms within the ventilator's configuration processing system, creating a persistent denial-of-service condition that can be exploited by attackers with physical access to the device. The flaw specifically manifests when the device processes specially crafted XML configuration files, allowing malicious actors to manipulate the system's operational state in ways that render the ventilator permanently non-functional.
The technical nature of this vulnerability aligns with CWE-611, which categorizes improper access control in XML processors, and demonstrates how XML external entity processing flaws can lead to system compromise. The vulnerability operates through a path traversal or injection mechanism where the device fails to properly validate XML input, enabling attackers to craft malicious payloads that exploit the underlying XML parser. This weakness creates a persistent threat because the affected devices maintain their vulnerable state even after reboot cycles, meaning the device remains unusable until physical intervention or firmware updates occur. The attack vector requires physical access to the device, which places this vulnerability in the context of insider threats or compromised environments where adversaries have direct hardware access.
From an operational perspective, this vulnerability presents a severe risk to patient safety and healthcare delivery systems, as ventilators are critical life-support devices that must remain operational during medical emergencies. The persistent nature of the vulnerability means that once exploited, the device cannot be recovered without manual intervention, potentially leaving patients without essential respiratory support during critical care situations. The impact extends beyond individual device compromise to affect broader healthcare infrastructure, as ventilator failures can cascade into larger system disruptions and emergency response challenges. This vulnerability also demonstrates the critical importance of securing medical device firmware update processes and maintaining proper input validation controls in healthcare technology environments.
Mitigation strategies for CVE-2020-27282 should prioritize immediate firmware updates from Hamilton Medical AG to address the XML validation flaw, while also implementing physical security measures to prevent unauthorized access to ventilator devices. Organizations should establish strict access controls for medical equipment and maintain detailed inventory tracking of device firmware versions to quickly identify vulnerable systems. The vulnerability highlights the need for comprehensive security testing of medical devices, particularly those operating in critical care environments where device reliability directly impacts patient outcomes. Security teams should also consider implementing network segmentation strategies that limit physical access to critical medical devices and establish clear protocols for device maintenance and security patching in healthcare settings. This vulnerability serves as a reminder of the critical need for robust input validation in all system components, particularly in medical devices where failure can have life-threatening consequences.