CVE-2020-15486 in ECG Pen
Summary
by MITRE
An issue was discovered on Dr Trust ECG Pen 2.00.08 devices. Because the Bluetooth LE support is implemented without a requirement for pairing or security, any attacker can access the GATT server of the device and can sniff the data being broadcasted while a measurement is being done. Also, saved data can also be extracted over a Bluetooth connection. In addition, an attacker can launch a man-in-the-middle attack against data integrity.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 08/27/2020
The vulnerability identified in Dr Trust ECG Pen 2.00.08 devices represents a critical security flaw in medical device communication protocols that exposes sensitive patient health information to unauthorized access. This issue stems from the device's implementation of Bluetooth Low Energy (BLE) connectivity without proper security measures, creating an attack surface that violates fundamental cybersecurity principles for healthcare equipment. The lack of pairing requirements and security protocols in the BLE implementation creates a fundamental weakness that allows attackers to establish unauthorized connections to the device's GATT server, which serves as the primary interface for data exchange and device configuration.
The technical flaw manifests through the absence of required Bluetooth security mechanisms including encryption, authentication, and authorization controls that should be mandatory for any device handling sensitive medical data. The device operates in an unsecured state where any nearby attacker with appropriate BLE capabilities can establish a connection to the GATT server without presenting credentials or undergoing any form of device verification. This vulnerability directly maps to CWE-311, which addresses the absence of encryption for sensitive data, and CWE-312, which covers the exposure of sensitive information through improper data handling. The implementation allows for passive data interception during active measurements and provides full access to stored medical records, creating a comprehensive attack vector that compromises both real-time and historical patient data.
The operational impact of this vulnerability extends beyond simple data theft to encompass potential patient safety risks and regulatory compliance violations. Attackers can not only intercept live ECG data during measurements but also extract previously saved medical records stored on the device, creating a comprehensive database of patient health information that could be used for identity theft, insurance fraud, or other malicious activities. The ability to conduct man-in-the-middle attacks against data integrity poses additional threats where attackers can modify or inject false medical data, potentially leading to incorrect medical diagnoses or treatments. This vulnerability particularly affects healthcare environments where patient privacy is paramount, as it violates the principles of confidentiality, integrity, and availability that form the foundation of healthcare information security.
Mitigation strategies must address both immediate and long-term security requirements for the affected devices. Immediate actions should include implementing network segmentation to isolate medical devices from general network access, deploying Bluetooth monitoring tools to detect unauthorized connections, and establishing incident response procedures for potential data breaches. Organizations should consider disabling BLE functionality on affected devices until proper security patches are implemented, while also conducting comprehensive inventory assessments to identify all similar vulnerable devices within their healthcare infrastructure. The vulnerability demonstrates the critical importance of implementing secure communication protocols in medical devices, aligning with healthcare security frameworks such as HIPAA regulations and NIST cybersecurity guidelines that mandate appropriate security controls for protected health information. Long-term solutions require device manufacturers to implement proper Bluetooth security protocols including mandatory pairing, encryption, and authentication mechanisms, while healthcare organizations must establish robust device management policies that include regular security assessments and vulnerability monitoring. This case highlights the need for security-by-design principles in medical device development and the importance of addressing cybersecurity concerns throughout the entire product lifecycle rather than as an afterthought.