STIGQter: STIG Summary: Red Hat Enterprise Linux 8 Security Technical Implementation Guide Version: 2 Release: 8 Benchmark Date: 01 Jul 2026:

If the Trivial File Transfer Protocol (TFTP) server is required, the RHEL 8 TFTP daemon must be configured to operate in secure mode.

DISA Rule

SV-230557r1088855_rule

Vulnerability Number

V-230557

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

RHEL-08-040350

Severity

CAT II

CCI(s)

CCI-000366 - Implement the security configuration settings.

Weight

Fix Recommendation

Configure the TFTP daemon to operate in secure mode with the following command:
$ sudo systemctl edit tftp.service

In the editor enter:
[Service]
ExecStart=/usr/sbin/in.tftpd -s /var/lib/tftpboot

After making changes, reload the systemd daemon and restart the TFTP service as follows:
$ sudo systemctl daemon-reload
$ sudo systemctl restart tftp.service

Check Contents

Note: IAW RHEL-08-040190 if TFTP is not required, it should not be installed. If TFTP is not installed, this rule is not applicable.

Check to see if TFTP server is installed with the following command:

$ sudo dnf list installed | grep tftp-server
tftp-server.x86_64 x.x-x.el8

Verify that the TFTP daemon, if tftp.server is installed, is configured to operate in secure mode with the following command:

$ grep -i execstart /usr/lib/systemd/system/tftp.service
ExecStart=/usr/sbin/in.tftpd -s /var/lib/tftpboot

Note: The "-s" option ensures that the TFTP server only serves files from the specified directory, which is a security measure to prevent unauthorized access to other parts of the file system.

If the TFTP server is installed but the TFTP daemon is not configured to operate in secure mode, this is a finding.

Vulnerability Number

V-230557

Documentable

False

Rule Version

RHEL-08-040350

Severity Override Guidance

Check Content Reference

Target Key

2921