1. EXECUTIVE SUMMARY
- CVSS v3 6.5
- ATTENTION: Exploitable from an adjacent network/low attack complexity
- Vendor: Philips
- Equipment: e-Alert
- Vulnerability: Missing Authentication for Critical Function
2. RISK EVALUATION
Successful exploitation of this vulnerability may allow an unauthorized actor to remotely shutdown the system, if on the healthcare facilities network.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of the e-Alert hardware solution are affected:
- e-Alert Version 2.7 and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 MISSING AUTHENTICATION FOR CRITICAL FUNCTION CWE-306
The software does not perform any authentication for critical system functionality.
CVE-2022-0922 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been calculated; the CVSS vector string is (AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
- CRITICAL INFRASTRUCTURE SECTORS: Healthcare and Public Health
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: Netherlands
External researcher Andrew Dedmon reported this vulnerability to Philips.
Philips plans a new release to remediate this vulnerability before July 2022. As an interim mitigation to this vulnerability, Philips recommends the following:
- Users should operate all Philips deployed and supported products within Philips authorized specifications, including physical and logical controls. Only authorized personnel should be permitted to access the network and the devices connected to it.
Users with questions about their specific e-Alert product should contact a Philips service support team or regional service support. Users can also reference the Philips advisory for more details.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
- Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the Internet.
- Locate control system networks and remote devices behind firewalls and isolate them from the business network.
- When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as its connected devices.
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage on cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents.
No known public exploits specifically target this vulnerability.