Information
The ESXi host Secure Shell (SSH) daemon must ignore .rhosts files.
GROUP ID: V-258738
RULE ID: SV-258738r1015920
SSH trust relationships mean a compromise on one host can allow an attacker to move trivially to other hosts. SSH can emulate the behavior of the obsolete "rsh" command in allowing users to enable insecure access to their accounts via ".rhosts" files.
Solution
From an ESXi shell, run the following command:
esxcli system ssh server config set -k ignorerhosts -v yes
or
From a PowerCLI command prompt while connected to the ESXi host, run the following commands:
$esxcli = Get-EsxCli -v2
$arguments = $esxcli.system.ssh.server.config.set.CreateArgs()
$arguments.keyword = 'ignorerhosts'
$arguments.value = 'yes'
$esxcli.system.ssh.server.config.set.Invoke($arguments)