SV-226958r603265: The TFTP daemon must operate in secure mode which provides access only to a single directory on the host file system. | Solaris 10 SPARC STIG SCAP Benchmark

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Assessment Title

Rule Text

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

Description

Discussion Text

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.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000366SV-28419V-847

References

DPMS Target Solaris 10 SPARC DISA DPMS Target Solaris 10 SPARC 4060

Checks

DISA STIG (Manual Reference)

Determine if TFTPD is running in secure mode.

# grep tftp /etc/inet/inetd.conf
OR
# svccfg -s tftp/udp6 listprop |grep in.tftpd |grep exec

If any returned service line does not use the -s parameter to TFTPD, this is a finding. If TFTP is not installed this check is not applicable.

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.solaris11:def:294
# The TFTP daemon must operate in secure mode which provides access only to a single directory on the host file system.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Determine if TFTPD is running in secure mode (-s) in /etc/inet/inetd.conf
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  (sed -En 's/^tftp(.*)/\1/p' '/etc/inet/inetd.conf') | grep -Pq '[ 	]-s'
}
# Determine if TFTPD is running in secure mode (-s) in SMF
# xmlfilecontent_object (xmlfilecontent_test)
test_2() {
  (xmllint --xpath '/service_bundle/service/exec_method[@name='\''inetd_start'\'']/@exec' '/var/svc/manifest/network/tftp-udp6.xml' 2>/dev/null | sed -E 's/^[^=]+="//; s/"$//') | grep -Pq '[ 	]-s'
}

if ! ( test_1 && test_2 ); then
  echo "PASS"
else
  echo "FAIL"
fi

Assessment Script Powered by AISandbox-executed

A standalone Shell script to assess this control automatically. Review before running it in your environment.

Syntax-checked and actually executed in an isolated sandbox (not the real system this checks) — confirmed to run without errors.

#!/bin/sh
# OVAL Definition: oval:mil.disa.fso.solaris11:def:294
if [ ! -f "/etc/inet/inetd.conf" ]; then echo "PASS"; exit 0; fi; grep -q "^tftp[ \t]-s" /etc/inet/inetd.conf || { echo "FAIL"; exit 1; }; if [ ! -d "/var/svc/manifest/network" ]; then echo "PASS"; exit 0; fi; xmllint --xpath "string(//service_bundle/service[@name='tftp-udp6']/exec_method[@name='inetd_start']/@exec[contains(., '-s')])" /var/svc/manifest/network/tftp-udp6.xml || { echo "FAIL"; exit 1; }; echo "PASS"; exit 0

Remediation

Edit /etc/inet/inetd.conf and add the -s parameter to TFTPD.
# inetconv

OR

Update the SMF entry for the TFTP daemon.
# svccfg -s tftp/udp6 setprop inetd_start/exec = "astring:\"/usr/sbin/in.tftpd -s <other TFTPD options>\""