OL 9 Trivial File Transfer Protocol (TFTP) daemon must be configured to operate in secure mode if the TFTP server is required.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-271764 | OL09-00-002426 | SV-271764r1092004_rule | Medium |
| Description |
| Restricting TFTP to a specific directory prevents remote users from copying, transferring, or overwriting system files. Using the "-s" option causes the TFTP service to only serve files from the given directory. |
| STIG | Date |
| Oracle Linux 9 Security Technical Implementation Guide | 2025-05-08 |
Details
| Check Text (C-75814r1092002_chk) |
| Verify that OL 9 TFTP daemon is configured to operate in secure mode. Check if a TFTP server is installed with the following command: $ sudo dnf list --installed tftp-server Installed Packages tftp-server.x86_64 5.2-38.el9 @ol9_appstream Note: If a TFTP server is not installed, this requirement is Not Applicable. If a TFTP server is installed, check for the server arguments with the following command: $ systemctl cat tftp | grep ExecStart ExecStart=/usr/sbin/in.tftpd -s /var/lib/tftpboot If the "ExecStart" line does not have a "-s" option, and a subdirectory is not assigned, this is a finding. |
| Fix Text (F-75721r1092003_fix) |
| Configure the TFTP daemon to operate in secure mode. Find the path for the systemd service. $ sudo systemctl show tftp | grep FragmentPath= FragmentPath=/etc/systemd/system/tftp.service Edit the ExecStart line on that file to add the -s option with a subdirectory. ExecStart=/usr/sbin/in.tftpd -s /var/lib/tftpboot |