Re: [FD] Grandstream VoIP phone: SSH key backdoor and multiple vulnerabilities leading to RCE as root (David Jorm

> A final issue I've reported to them in the past that's not resolved is the SSH host key being shared across all phones of the same firmware version. > > The authenticity of host '10.150.117.57 (10.150.117.57)' can't be established. > RSA key fingerprint is 7f:83:e8:5c:0b:fb:d1:47:c7:f1:33:60:b1:28:b9:f9. > > The authenticity of host '10.150.117.65 (10.150.117.65)' can't be established. > RSA key fingerprint is 7f:83:e8:5c:0b:fb:d1:47:c7:f1:33:60:b1:28:b9:f9. This may (or may not) be a vulnerability. If they allow you to shut down the port so that no one can connect unless authorized by the owner, then its probably not a vulnerability. But its still a poor choice for security engineering. Do you know if the port can be closed?

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