How to Mitigate COVID-19's Impact on Device Security and Patient Safety

Key Challenges and Security Reassessment Recommendations

A recent Masergy survey of IT leaders named medical device security as the leading IT challenge healthcare entities are facing under the current landscape. Nearly all healthcare organizations have seen a serious increase in network traffic in the last year, given the surge of remote healthcare and increased use of IoMT devices.

The expanded inventory of devices further exacerbated the inherent risks: many of these platforms use legacy operating systems and have vulnerabilities that sometimes just can’t be patched.

For example, TCP/IP stacks, foundational elements of millions of IoT and IT devices, are riddled with security flaws easily exploitable by attackers. A successful hack could allow for remote code execution, data loss, or patient safety risks.

“Devices can’t be equipped with tools to prevent malware, and you can’t lock them down in the way you could with a laptop or workstation,” Staynings said. “It’s also not straightforward to patch the devices because of the complexity of vendor relationships that watch and service these devices.”

But the real challenge is that the devices are managed by IT, which means the security team doesn’t have much visibility into the risk they present to the overall network --unless the hospital leverages automated scanning or risks assessments, Staynings stressed.

The rapid adoption of telehealth solutions in the past year has added to these risks. Cohen explained that many of these solutions were placed onto devices that did not employ proper Mobile Device Management (MDM) solutions. 

As these devices now carry PHI and there are huge visibility challenges into their condition and control of the data, these devices carry an equally critical risk, he added.

Key Risks of Swiftly Onboarded Medical Devices: 
• Unknown current security posture of devices, their vulnerabilities, cyber hygiene (proper passwords, etc), and the possible impact on patient safety and data confidentiality.
• Unknown posture of the security controls enabled in these devices, whether they run an anti-malware agent, etc.
• Lack of control of PHI - many telehealth devices were installed on devices without an MDM solution or even BYOD devices. These devices carry now PHI, yet there's hardly any visibility into their condition, and control of the data on them.
• Inability to tell if the devices already carry malware inside, and what risk they impose on the entire clinical network.

Staynings noted that perpetrators are seeing the interoperability of the sector as an easy way to compromise a hospital or healthcare network. As such, they’re actively scanning for medical devices.

Data upholds that nation-state actors are looking to attack devices using the DICOM port: a key tool for viewing medical images from the Picture Archiving and Communication System (PACS), explained Staynings. 

However, these technologies are riddled with flaws, with a range of US healthcare providers leaving millions of medical images exposed online. And a majority (80 percent) of devices operate using legacy platforms that are no longer supported, including Microsoft Windows XP.

The trouble is that the devices are designed to operate for 15 to 20 years, and as long as they keep working, “it’s financially unjustified to replace perfectly working devices,” said Staynings. As a result, these devices are kept in operation despite operating on vulnerable systems. 

These issues are further compounded by hospitals and those tasked with managing devices not responding quickly enough to patching and system updates because of how organizations are structured.

Some vendors have also been slow to test and assess patches, then communicate to providers that these updates are available.

As it’s clear the pandemic and needed technologies are staying put into the foreseeable future, administrators must ask key questions to reassess the security of these rapidly onboarded medical devices:
• Do these devices have proper passwords set up?
• Have known vulnerabilities been patched?
• Are they running any anti-malware agents?

“These are simple questions that, had the right amount of time been devoted to onboarding each device, would have been answered before the deployment,” Cohen added.

Medical Devices Reassessment and Visibility Needs

One of the key issues with medical devices within the healthcare enterprise network is that far too often, administrators are both unaware of the precise number of devices operating on the network at any given time and just who is connecting to these devices and the network through the web of devices.

In one example, Staynings shared that during an assessment of one hospital, he found 30,000 connected devices operating on the network. About 17,000 of those devices were missing a security patch and thus, posing a serious security risk.

As such, visibility into the entire fleet of medical devices is one of the first most important steps to reassuring that newly implemented and established devices are secure, Cohen explained. It’s impossible to protect something if the administrator does not know it exists.

Security leaders must perform a complete and accurate inventory, which will allow selected security solutions to begin extending network security controls over the devices and analyze the state of all newly implemented devices.

The next steps should include reaffirming that the most obvious threat actors are eliminated, which must include ensuring devices have passwords and authentications, known vulnerabilities are patched, anti-malware tools are employed, and unnecessary ports are closed, Cohen added.

“It’s important to say that while experts in medical care, doctors, nurses and hospital administrators are not cybersecurity professionals, nor should they be expected to be,” Cohen said. 

“Establishing visibility and ensuring continuous device security is difficult and requires constant vigilance, and medical professionals should not be expected to provide the high level of patient care desired, while also worrying about the cybersecurity implications of adding new devices,” he added.

To better support these efforts and reduce the burden, hospitals need to implement cybersecurity solutions that can better establish end-to-end visibility onto the network and monitor for potential intrusions, he explained.

Inventory Management Best Practices

CyberMDX research shows an average of 30 percent of devices are routinely lost from the network, which poses massive issues for the teams tasked with securing the fleet.

Even a small hospital can still operate with more than 150 families of devices, which can total thousands of devices. Cohen explained that it would be nearly impossible to keep up with every single vulnerability through a manual process.

“As proper cybersecurity is a never-ending 24/7 effort, the first key is automation. With the size of modern medical networks, security teams struggle to keep up with the thousands of devices moving about the hospital and going in and out of service on a daily basis,” Cohen said.

“Today we have the technology to automatically inventory network devices, assess their security posture and bring them into compliance,” he continued. “We can do this by detecting and remediating issues on the device itself and by putting layers of protection around the devices either on the network or on the perimeter level - to mitigate issues that can not be remediated.”

Staynings confirmed that automation should not be an optional process for medical devices, given the scale of deployment and estimates that show the number of connections within a hospital network will only continue to rapidly expand into the foreseeable future.

Automation can extend to creating profiles for endpoints, configurations, all user profiles, monitoring, and other elements needed to support a Zero Trust approach, he added.

Once an organization has developed a thorough inventory and process, administrators must then prioritize which devices and vulnerabilities are most critical and move down the list of devices, he added.

In the hospital setting, this means a deep clinical context based on each device, its patient safety classification, and the role it plays in care workflows will be crucial to prioritizing and mitigating key issues.

To Staynings, medical device security and these needed technologies require prioritization by senior healthcare executives.

A Vendor’s Perspective

In August 2018, a MedCrypt report showed there’s been a 400 percent increase in the number of vulnerabilities disclosed each quarter since the FDA released its medical device cybersecurity guidance.

While the spike may appear alarming, it’s actually a positive move in the right direction for securing the medical device infrastructure. BD has been one of the vendors leading in disclosures, which Suarez stressed is part of the vendor’s goals to bolstering transparency and supporting providers in this key security area.

“There is a patient at the end of everything we do,” he explained. “When looking at security, as a company, we apply that philosophy: protecting healthcare and making healthcare more resilient; and protecting the patient’s privacy and safety.”

“We approach medical device security in a way that elevates security to a patient safety issue,” Suarez added. “We have this organization dedicated to cybersecurity at BD,  including IT infrastructure and protecting supply chain, manufacturing and distribution capabilities.”

As medical technologies leverage software designed by humans, there will always be bugs and defects, said Suarez. So when it comes to disclosures, the goal is to provide transparency on the risks of medical devices and communicate those issues to customers.

Providers can’t protect what they don’t know about, so if a vendor fails to communicate those risks to customers about discovered flaws, they won’t be able to protect their enterprise or the patients they serve, he explained.

One of the best ways to communicate these risks is through the H-ISAC and the Department of Homeland Security Cybersecurity and Infrastructure Security Agency. Suarez noted that the collaboration between these key stakeholders makes it easy to broadly communicate risks to the community.

All vendors and manufacturers need to adopt a similar approach to communicating risks, as human-designed technology will always come with fundamentally fallible elements. It’s also a sign of care and transparency to customers, especially when it comes to sharing tough issues.

“I don’t think vulnerability sharing should be taboo or frowned upon,” Suarez said. “A vulnerability disclosure shows maturity in an organization’s ability to understand new cyber risks, create mitigation steps, and communicate those needs to customers.”

“Medical device risk is not going to end until we all understand that technology has defects and issues, and communicating those risks are just a necessary next step,” he added. “Cyberattacks will always happen. It’s not only about mitigation or incorporating a securing tool: There has to be a broader approach to building resilience into the healthcare environment.”