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The ESXi host Secure Shell (SSH) daemon must not permit user environment settings.


Finding ID Version Rule ID IA Controls Severity
V-256388 ESXI-70-000016 SV-256388r885945_rule Medium
SSH environment options potentially allow users to bypass access restriction in some configurations. Users must not be able to present environment options to the SSH daemon.
VMware vSphere 7.0 ESXi Security Technical Implementation Guide 2023-06-21


Check Text ( C-60063r885943_chk )
From an ESXi shell, run the following command:

# /usr/lib/vmware/openssh/bin/sshd -T|grep permituserenvironment

Expected result:

permituserenvironment no

If the output does not match the expected result, this is a finding.
Fix Text (F-60006r885944_fix)
From an ESXi shell, add or correct the following line in "/etc/ssh/sshd_config":

PermitUserEnvironment no