drivers/docker+exec+java: disable net_raw capability by default #10572
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The default Linux Capabilities set enabled by the docker, exec, and java task drivers includes CAP_NET_RAW (for making ping just work), which has the side affect of opening an ARP DoS/MiTM attack between tasks using bridge networking on the same host network. https://docs.docker.com/engine/reference/run/#runtime-privilege-and-linux-capabilities This PR disables CAP_NET_RAW for the docker, exec, and java task drivers. The previous behavior can be restored for docker using the allow_caps docker plugin configuration option. A future version of nomad will enable similar configurability for the exec and java task drivers.
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The default Linux Capabilities set enabled by the docker, exec, and
java task drivers includes CAP_NET_RAW (for making ping just work),
which has the side affect of opening an ARP DoS/MiTM attack between
tasks using bridge networking on the same host network.
https://docs.docker.com/engine/reference/run/#runtime-privilege-and-linux-capabilities
This PR disables CAP_NET_RAW for the docker, exec, and java task
drivers. The previous behavior can be restored for docker using the
allow_caps docker plugin configuration option.
A future version of nomad will enable similar configurability for the
exec and java task drivers.