Michele Chubirka, a Cloud Security Advocate at Google Cloud with a rich background in finance and academia, delves into the security dynamics between containers and virtual machines. She discusses the implications of attack surfaces, patch speed, and the complexities of misconfigurations in orchestrators. Michele shares strategies for organizations to effectively balance the strengths and vulnerabilities of both technologies. With insights on the future interplay of containers, VMs, and WebAssembly, she inspires a proactive approach to evolving security challenges.
The security of containers versus virtual machines depends on specific organizational contexts and proper integration of security practices within engineering teams.
Containers may introduce complexity and misconfiguration risks, necessitating robust scanning processes and efficient management to maintain security in a rapidly evolving threat landscape.
Deep dives
Understanding Container and VM Security
The comparison between container and virtual machine (VM) security often oversimplifies the complexities involved. The discussion emphasizes that it is not a matter of which is inherently more secure; rather, it depends on specific contexts and organizational structures. Proper integration of security within the engineering teams plays a critical role in determining overall security. The interaction between platform engineering and security teams, as well as understanding the architecture, significantly influences the security posture of either containers or VMs.
Isolation vs. Segregation in Containers
When discussing security, a clear distinction is made between isolation and segregation in the context of containers. Containers use a shared kernel, leading to a call for viewing their setup as segregation rather than outright isolation, which is characteristic of VMs. Anecdotal evidence suggests higher instances of container escapes, highlighting the importance of proper organizational structure and security measures in managing risks. Therefore, understanding your system's architecture and implementing adequate security controls is vital for protecting applications in either environment.
Managing Attack Surfaces in Containers
The conversation about attack surfaces reveals a misconception that containers have smaller attack surfaces compared to VMs. In reality, containers often introduce increased complexity, particularly when legacy applications are deconstructed into multiple components, which can create vulnerabilities. Security must adapt to account for the deployment and runtime of containers, including supply chain concerns, drift detection, and ensuring proper controls are in place. Therefore, implementation of robust scanning and assurance processes is crucial to maintain security in a containerized environment.
The Future of Container and VM Security
Looking forward, both container and VM technologies are expected to coexist with emerging technologies like WebAssembly (Wasm) aimed at enhancing security and reducing attack surfaces. Wasm offers a slim and efficient method of running workloads that could potentially minimize vulnerabilities related to traditional containers. The importance of embracing immutability and effective management practices will also shape future security methods in both containers and VMs. Ultimately, fostering open communication about security practices and policies will be essential in adapting to advancements in technology.
How would you approach answering the question ”what is more secure, container or a virtual machine (VM)?”
Could you elaborate on the real-world implications of this for security, and perhaps provide some examples of when one might be a more suitable choice than the other?
While containers boast a smaller attack surface (what about the orchestrator though?), VMs present a full operating system. How should organizations weigh these factors against each other?
The speed of patching and updates is a clear advantage of containers. How significant is this in the context of today's rapidly evolving threat landscape? Are there any strategies organizations can employ to mitigate the slower update cycles associated with VMs?
Both containers and VMs can be susceptible to misconfigurations, but container orchestration systems introduce another layer of complexity. How can organizations address this complexity and minimize the risk of misconfigurations leading to security vulnerabilities?
What about combining containers and VMs. Can you provide some concrete examples of how this might be implemented? What benefits can organizations expect from such an approach, and what challenges might they face?
How do you envision the security landscape for containers and VMs evolving in the coming years? Are there any emerging trends or technologies that could significantly impact the way we approach security for these two technologies?