The Photon operating system must configure Secure Shell (SSH) to disable X11 forwarding.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-258875 | SRG-OS-000480-GPOS-00227 | PHTN-40-000212 | SV-258875r991589_rule | 2024-07-11 | 2 |
| Description |
|---|
| X11 is an older, insecure graphics forwarding protocol. It is not used by Photon and should be disabled as a general best practice to limit attack surface area and communication channels. |
| ℹ️ Check |
|---|
| At the command line, run the following command to verify the running configuration of sshd: # sshd -T|&grep -i X11Forwarding Example result: x11forwarding no If "X11Forwarding" is not set to "no", this is a finding. |
| ✔️ Fix |
|---|
| Navigate to and open: /etc/ssh/sshd_config Ensure the "X11Forwarding" line is uncommented and set to the following: X11Forwarding no At the command line, run the following command: # systemctl restart sshd.service |