Seccomp
Seccomp (short for secure computing mode) is a Linux kernel security feature that allows processes to restrict the system calls they can make, reducing the attack surface and limiting potential damage from compromised applications. It works by filtering syscalls based on predefined policies, either in a strict mode that only allows a minimal set or a more flexible filter mode using Berkeley Packet Filter (BPF) rules. This tool is essential for containerization and sandboxing environments to enforce least-privilege principles.
Developers should learn and use Seccomp when building secure applications, especially in containerized deployments like Docker or Kubernetes, to mitigate risks from privilege escalation and code execution vulnerabilities. It's crucial for sandboxing untrusted code, such as in web browsers or serverless functions, and for compliance with security standards in cloud-native architectures. Implementing Seccomp policies helps harden systems by preventing malicious processes from making unauthorized syscalls.