IIn the current era where many network appliances are built on Linux operating systems, strong and robust firmware security is a must. Historically, network devices struggled to implement everything securely.
As a result, there is a big push to use both memory-safe languages, as well as achieve process isolation similar to that of hardened operating systems. Technologies like docker, k8s, and languages like golang are gaining adoption in the device firmware industry. But, they are not a cure-all.
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Article Link: Securing Network Appliances: New Technologies and Old Challenges