If the Trivial File Transfer Protocol (TFTP) server is required, the TFTP daemon must be configured to operate in secure mode.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-269272 | ALMA-09-021690 | SV-269272r1050154_rule | CCI-000366 | 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 | |||
| Cloud Linux AlmaLinux OS 9 Security Technical Implementation Guide | 2026-02-27 | |||
Related Frameworks
4 paths across 3 frameworks
Related Frameworks
NIST 800-531 mapping
CM-6
1.00
- DISA · V1R6 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
NIST 800-1712 mappings
3.4.1
1.00
- DISA · V1R6 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
3.4.2
1.00
- DISA · V1R6 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
CCI1 mapping
CCI-000366
1.00
- DISA · V1R6 · disa_xccdf · related
Details
Check Text (C-269272r1050154_chk)
Note: If a TFTP server is not installed, this requirement is Not Applicable.
Verify the TFTP daemon is configured to operate in secure mode.
Check if a TFTP server is installed with the following command:
$ dnf list --installed tftp-server
Installed Packages
tftp-server.x86_64 5.2-37.el9 @appstream
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-73204r1048193_fix)
Configure the TFTP daemon to operate in secure mode with the following command:
$ systemctl edit tftp.service
Insert the following between the two sets of comments, making sure to add the "-s" option with a nonroot ("/") directory.
[Service]
ExecStart=
ExecStart=/usr/sbin/in.tftpd -s /tftp