HiveOS through 0.6-102@191212 ships with SSH host keys baked into the installation image, which allows man-in-the-middle attacks and makes identification of all public IPv4 nodes trivial with Shodan.io. NOTE: as of 2019-09-26, the vendor indicated that they would consider fixing this.

References

• https://nvd.nist.gov/vuln/detail/CVE-2019-19754
• https://hiveos.farm/changelog
• https://rsaxvc.net/blog/2020/4/10/Widespread_re-use_of_SSH_Host_Keys_in_Ethereum_Mining_Rig_Operating_Systems.html