Kernel privilege escalation: how Kubernetes container isolation impacts privilege escalation attacks

In summary, Kubernetes container isolation impacts privilege escalation attacks by layering abstractions that make exploitation harder. The article explores an old issue in the af_packet implementation that received CVE-2017-7308, which is exploitable with the CAP_NET_RAW capability. The authors demonstrate how to exploit this vulnerability in a non-containerized environment and then show how Kubernetes container isolation prevents the exploit from succeeding. They also discuss the use of seccomp as a defense-in-depth control to mitigate this type of attack by filtering system calls and preventing the unshare syscall.

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