CVE-2018-8844 in e-Alert Unit
Summary
by MITRE
Philips e-Alert Unit (non-medical device), Version R2.1 and prior. The web application does not, or cannot, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.
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Analysis
by VulDB Data Team • 03/27/2020
The Philips e-Alert Unit represents a critical non-medical device that serves as a communication platform for healthcare facilities, designed to alert medical personnel to urgent situations. This device operates as a web-based application system that processes various user inputs and commands, making it a potential target for malicious actors seeking unauthorized access or system manipulation. The vulnerability identified in version R2.1 and prior installations stems from insufficient input validation mechanisms within the web application layer, creating a fundamental security weakness that undermines the integrity of the entire system. This flaw specifically addresses the application's inability to properly authenticate and validate user requests, potentially allowing attackers to submit malformed or unauthorized inputs that could be processed without adequate scrutiny.
The technical implementation of this vulnerability manifests as a failure in the web application's request validation framework, where the system cannot adequately distinguish between legitimate user submissions and potentially malicious inputs. This weakness creates a path for attackers to exploit the system through various means including but not limited to parameter manipulation, injection attacks, or unauthorized command execution. The vulnerability directly relates to CWE-20, which describes improper input validation, and falls under the broader category of weak input validation that enables attackers to bypass intended security controls. The application's design appears to lack robust sanitization and verification mechanisms that would normally ensure all incoming requests conform to expected formats and originate from authenticated users.
From an operational perspective, this vulnerability presents significant risks to healthcare facility security and patient safety protocols. Attackers who successfully exploit this weakness could potentially manipulate the alert system to either suppress critical notifications or flood the system with false alerts, disrupting normal operations and potentially endangering patient care. The impact extends beyond simple data manipulation, as the e-Alert Unit serves as a communication bridge between healthcare personnel and critical systems, making it a prime target for attackers seeking to compromise healthcare delivery. The vulnerability's severity is compounded by the fact that it affects non-medical devices that often operate with less stringent security controls than traditional medical equipment, creating additional exposure points within healthcare networks.
Organizations utilizing Philips e-Alert Units should implement immediate mitigations including firmware updates to versions that address the input validation weakness, network segmentation to limit access to the device, and enhanced monitoring of system communications. The implementation of proper input validation controls, including parameter sanitization and request authentication mechanisms, should be prioritized to prevent exploitation of this vulnerability. Security teams should also consider implementing web application firewalls and intrusion detection systems specifically configured to monitor for suspicious request patterns that could indicate attempts to exploit this weakness. Additionally, regular security assessments and penetration testing should be conducted to identify and address similar validation issues within the broader healthcare IT infrastructure, ensuring compliance with industry standards such as those outlined in the NIST Cybersecurity Framework and healthcare-specific regulations governing medical device security.