Virtual machines, commonly referred to as VMs, have become an integral part of many organizations’ IT infrastructures due to their ability to provide isolation for user work sessions. However, there is some confusion surrounding the security of this technology and how effectively it can protect against cyber threats. Before organizations deploy VMs, it is imperative for their management to fully understand how this technology works and the extent of its security capabilities.
A virtual machine operates on a host system, whether it be a cloud provider, internal virtual desktop infrastructure (VDI), or even a desktop computer. Within the host system, the VM session is known as a guest, and multiple guests can run on a single host regardless of its type. The deployment and allocation of computing resources for hosting VMs require specialized software known as a hypervisor.
Enterprise organizations often utilize VMs within the context of VDI, where users’ virtual desktops are contained within specially programmed VMs. IT departments configure and deploy these VMs in large numbers to provide end users with fully functional desktops that include applications and user profiles. Unlike traditional laptops, VMs only require a monitor and peripheral support devices such as a mouse and keyboard for users to interact with the desktop session. All the computing resources are housed within the host system, allowing users to access VMs using their own desktop hardware or thin clients.
Despite the security benefits of isolation that VMs offer, they are not immune to cyber threats and face many of the same risks as local desktops. The effectiveness of the isolated nature of VMs in providing security is highly dependent on how IT departments configure them. Users of VMs must remain vigilant about cybersecurity threats to ensure the protection of their data and systems.
For instance, a VM session can still be infected with malware if a user clicks on a phishing link or downloads a malicious executable. The process of fixing an infected VM session is usually simpler than dealing with a malware infection on a desktop PC, as terminating the session and starting a fresh one can often resolve the issue. However, malicious software can still potentially penetrate beyond the individual VM session through a vulnerability known as a VM escape, leading to infections of the underlying host system, the hypervisor, and beyond.
Additionally, users working from a VM can inadvertently upload or share malware with their organization’s cloud storage or file-sharing systems, posing a risk to internal company networks. This emphasizes the importance of IT administrators carefully managing VMs and implementing robust security measures to mitigate potential security threats. Admins should not view VMs as immune to cyber attacks and should take proactive steps to secure network access, limit interaction between VMs and host systems, and maintain a secure posture for applications and services interacting with VM sessions.
In conclusion, while virtual machines offer valuable benefits in terms of isolation and resource allocation, organizations must approach their deployment with caution and prioritize security measures to protect against cyber threats. By understanding how VMs work and the security challenges they pose, IT management can effectively leverage this technology while safeguarding their systems and data from potential risks.