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

From Red Hat Enterprise Linux 5 Security Technical Implementation Guide

Associated with IA controls: ECSC-1

Associated with: CCI-000366

SV-37560r1_rule The TFTP daemon must operate in "secure mode" which provides access only to a single directory on the host file system.

Vulnerability discussion

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.

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Fix text

Edit /etc/xinetd.d/tftp file and specify the "-s" parameter in server_args.

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