IT Best Practices Tip: nist_V-38616
The SSH daemon must not permit user environment settings.
SSH environment options potentially allow users to bypass access restriction in some configurations.
How to Check Correct Configuration
To ensure users are not able to present environment daemons, run the following command:
# grep PermitUserEnvironment /etc/ssh/sshd_config
If properly configured, output should be:
If it is not, this is a finding.
How to Fix
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":