OL 8 must not allow users to override SSH environment variables.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| high | V-248650 | SRG-OS-000480-GPOS-00229 | OL08-00-010830 | SV-248650r991591_rule | 2025-02-20 | 2 |
| Description |
|---|
| SSH environment options potentially allow users to bypass access restriction in some configurations. |
| ℹ️ Check |
|---|
| Verify that unattended or automatic login via SSH is disabled with the following command: $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*permituserenvironment' PermitUserEnvironment no If "PermitUserEnvironment" is set to "yes", is missing completely, or is commented out, this is a finding. If conflicting results are returned, this is a finding. |
| ✔️ Fix |
|---|
| Configure OL 8 to allow the SSH daemon to not allow unattended or automatic login to the system. Add or edit the following line in the "/etc/ssh/sshd_config" file: PermitUserEnvironment no The SSH daemon must be restarted for the changes to take effect. To restart the SSH daemon, run the following command: $ sudo systemctl restart sshd.service |