SV-37564r1: The TFTP daemon must have mode 0755 or less permissive. | Red Hat Enterprise Linux 5 Security Technical Implementation Guide

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Assessment Title

Rule Text

The TFTP daemon must have mode 0755 or less permissive.

Description

Discussion Text

If TFTP runs with the setuid or setgid bit set, it may be able to write to any file or directory and may seriously impair system integrity, confidentiality, and availability.

How this relates to the STIG checklist: STIG vs SCAP benchmark.

IA Controls

NIST SP 800-53

Not mappedCCI-000225

Additional Details

Responsibility

System Administrator

IA Controls

ECPA-1

References

DPMS Target Red Hat 5 DISA DPMS Target Red Hat 5 2154

SCC Automation Reference

The reconstructed evaluation script behind this rule's OVAL check(s) — every module a compound check combines, with this rule's own concrete values and DISA's SCC tool's real per-module mechanism curated from static teardown of SCC releases.

#!/bin/bash
# Reconstructed from oval:mil.disa.fso.rhel11:def:311
# The TFTP daemon must have mode 0755 or less permissive.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.
#
# MANUAL REVIEW REQUIRED -- the module(s) below could not be reconstructed
# into working code from curated SCC reference data, and are excluded from
# the automated result:
#   - file_object (file_test) -- The TFTP daemon must have mode 0755 or less permissive: <set> composition (base object oval:mil.disa.fso.rhel11:obj:31101): member unresolved -- no extractor for field "sticky"

# The TFTP daemon does no exist
# file_object (file_test)
test_2() {
  ! ( test -e '/etc/xinetd.d/tftp' &>/dev/null )
}

if ! test_2; then
  echo "PASS (automated portion only -- MANUAL REVIEW still required, see notes above)"
else
  echo "FAIL (or see MANUAL REVIEW note above)"
fi

Remediation

Change the mode of the TFTP daemon.

Procedure:
# chmod 0755 <in.tftpd binary>