CVE-2018-8856 in e-Alert Unit
Summary
by MITRE
Philips e-Alert Unit (non-medical device), Version R2.1 and prior. The software contains hard-coded cryptographic key, which it uses for encryption of internal data.
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Analysis
by VulDB Data Team • 03/27/2020
The Philips e-Alert Unit represents a critical security vulnerability identified as CVE-2018-8856, affecting versions R2.1 and earlier of this non-medical device. This device serves as a monitoring system that alerts healthcare providers to patient safety issues, making its security paramount to patient care and data integrity. The vulnerability stems from the implementation of a hard-coded cryptographic key within the device software, a flaw that fundamentally compromises the confidentiality and integrity of data processed by the system. This issue falls under the CWE-320 category of "Cryptographic Issues" and specifically relates to CWE-321, which addresses "Use of Hard-coded Cryptographic Key," making it a direct threat to the device's security posture.
The technical flaw manifests in the device's software architecture where cryptographic keys are embedded directly within the application code rather than being dynamically generated or securely stored. This hard-coded approach means that anyone with access to the device firmware or software can extract the encryption keys, potentially enabling unauthorized access to sensitive patient data and internal communications. The vulnerability creates a persistent security risk since the key cannot be rotated or updated without a complete software reinstallation, rendering the system vulnerable to attacks that exploit this static cryptographic material. This weakness allows adversaries to perform decryption operations on encrypted data stored within the device, potentially exposing patient information, system configurations, and communication protocols that are meant to remain confidential.
The operational impact of this vulnerability extends beyond simple data confidentiality breaches, as it fundamentally undermines the trustworthiness of the entire monitoring system. Healthcare providers relying on the e-Alert Unit may face unauthorized access to critical patient safety alerts and data, potentially leading to compromised patient care decisions. The vulnerability creates opportunities for attackers to manipulate alerts or inject false data into the system, which could result in delayed responses to genuine medical emergencies or inappropriate medical interventions. This risk is particularly concerning in healthcare environments where timely and accurate alerting is crucial for patient safety, making the device susceptible to both passive data theft and active system manipulation attacks.
Mitigation strategies for CVE-2018-8856 require immediate attention from healthcare organizations and device manufacturers. The primary recommendation involves implementing firmware updates from Philips that address the hard-coded key issue through proper cryptographic key management practices. Organizations should conduct comprehensive security assessments of their deployed devices and establish monitoring protocols to detect potential unauthorized access attempts. The implementation of network segmentation and access controls around these devices can help limit the attack surface, while regular security audits should verify that cryptographic keys are properly managed and rotated. Additionally, organizations should consider implementing network intrusion detection systems specifically configured to monitor for unusual patterns of access to these devices, as the vulnerability creates predictable attack vectors that can be exploited by adversaries with basic technical knowledge. This vulnerability highlights the importance of secure development practices and proper cryptographic implementation in all connected healthcare devices, aligning with industry standards that emphasize the need for dynamic key management and secure coding practices.