The SSH daemon must not permit user environment settings.

From VMware vSphere ESXi 6.0 Security Technical Implementation Guide

Part of SRG-OS-000480-VMM-002000

Associated with: CCI-000366

SV-77691r1_rule The SSH daemon must not permit user environment settings.

Vulnerability discussion

SSH environment options potentially allow users to bypass access restriction in some configurations.

Check content

To verify users are not able to present environment daemons, run the following command: # grep -i "^PermitUserEnvironment" /etc/ssh/sshd_config If there is no output or the output is not exactly "PermitUserEnvironment no", this is a finding.

Fix text

To ensure users are not able to present environment options to the SSH daemon, add or correct the following line in "/etc/ssh/sshd_config": PermitUserEnvironment no

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