By Phil Englert
During procurement of medical devices, organizations often request a Software Bill of Materials or SBOMs. This is not just any tool, but a crucial asset management tool. SBOMs provide a comprehensive view of what is inside a piece of software, which is essential for vulnerability management. The Vulnerability Exploitability eXchange (VEX) is a framework that leverages SBOM data to enhance vulnerability management. It does this by offering more precise and actionable insights into the risks associated with specific vulnerabilities.
VEX, with its precision, leverages the data from SBOMs. It can precisely pinpoint which components within a software package are impacted by a known vulnerability. This level of precision is crucial for vulnerability management. In addition, VEX uses the information from SBOMs to determine the specific context in which a vulnerability exists, such as its location within the software architecture and how it interacts with other components. This precision can help prioritize patching and remediation efforts more effectively.
VEX includes a range of metadata to provide a detailed understanding of vulnerabilities and their exploitability information about the specific vulnerability, including CVE identifiers, severity scores and descriptions. Details on whether the vulnerability is exploitable in the given context are based on factors such as the configuration of the software and its environment. If the vulnerability is exploited analysis of the potential impact helps determine the urgency of remediation. Recommendations on addressing the vulnerability, including available patches, workarounds or mitigations. Specific versions of affected components leverage SBOM data to provide precise targeting for updates or patches.
Within VEX, the status of a medical device about a vulnerability is crucial and VEX has four statuses to describe what is known about the vulnerability associated with the component within the medical device. “Under Investigation” indicates that the status is still being determined. “Not Affected” confirms that the medical device is not impacted by the vulnerability. “Affected” indicates the medical device is affected by the vulnerability. “Fixed” indicates a fix is available and has been applied.
Medical device owners can use VEX in several ways to proactively manage cybersecurity vulnerabilities across their organization’s endpoints. By providing precise information on which components are affected and their exploitability, VEX empowers medical device owners to assess the real risk of vulnerabilities more accurately. With detailed remediation guidance and component version information, medical device owners can prioritize and apply patches more efficiently, focusing on the most critical vulnerabilities first. In the event of a security incident, VEX provides detailed information that can help quickly identify affected components and understand the potential impact, enabling faster and more effective incident response. VEX also helps medical device owners maintain compliance with security standards and regulations by providing comprehensive vulnerability data and status updates, which can be used for reporting purposes. Finally, by continuously updating the status of medical devices and vulnerabilities, VEX allows medical device owners to stay ahead of potential threats and address vulnerabilities before they can be exploited.
In summary, the Vulnerability Exploitability eXchange (VEX) is a powerful tool that enhances the management of cybersecurity vulnerabilities by leveraging SBOM data, providing detailed metadata on vulnerabilities, and offering clear medical device status details. SBOMs are a new level of granularity for asset management and are especially important for maintaining the operational resilience of medical devices. The SBOM is static for a particular device version but the VEX will be highly dynamic as new vulnerabilities are discovered and their impact on the product are evaluated. VEX helps owners improve risk assessment, prioritize patching, enhance incident response, ensure compliance and manage vulnerabilities proactively across their organization. Be sure to understand how your medical device manufacturers provide VEX information and how quickly and frequently you can expect updates. SBOMs and VEX are the one-two punch needed to help you keep medical devices operational in today’s cyber aggressive environment.
