Sean Eric Fagan writes :
1. /dev/bpf0 is mode 400, root.wheel -- to read it, you need to break root.
2. If you can break root, you can rebuild a kernel with BPF *anyway*.
Not quite - bpf is potentially dangerous where a sysadmin is inexperienced.
On a system with a generic kernel and no
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Sean Eric Fagan wrote about the security implications of making the bpf device
the default in GENERIC etc.
I'm sorry, but that's a complete non-issue:
1. /dev/bpf0 is mode 400, root.wheel -- to read it, you need to break root.
2. If you can break root, you can rebuild a kernel with BPF
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