The TFTP daemon must operate in "secure mode" which provides access only to a single directory on the host file system.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-847	GEN005080	SV-37560r1_rule	ECSC-1	High

Description
Secure mode limits TFTP requests to a specific directory. If TFTP is not running in secure mode, it may be able to write to any file or directory and may seriously impair system integrity, confidentiality, and availability.

STIG	Date
Red Hat Enterprise Linux 5 Security Technical Implementation Guide	2017-03-01

Details

Check Text ( C-36211r1_chk )
# grep server_args /etc/xinetd.d/tftp If the "-s" parameter is not specified, this is a finding.

Fix Text (F-31470r1_fix)
Edit /etc/xinetd.d/tftp file and specify the "-s" parameter in server_args.