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.stig.ubuntu1604:def:240
# The SSH private host key files must have mode 0600 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): no extractor for field "gexec"
# The openssh-server package is installed
# dpkginfo_object (dpkginfo_test)
test_1() {
grep -A1 '^Package: openssh-server$' /var/lib/dpkg/status &>/dev/null
}
if test_1; then
echo "PASS (automated portion only -- MANUAL REVIEW still required, see notes above)"
else
echo "FAIL (or see MANUAL REVIEW note above)"
fi Assessment Script Powered by AISandbox-executed
A standalone Shell script to assess this control automatically. Review before running it in your environment.
Syntax-checked and actually executed in an isolated sandbox (not the real system this checks) — confirmed to run without errors.
#!/bin/sh
# DISA STIG / SCAP compliance check for SSH private host key files mode 0600 or less permissive
if [ ! -f /var/lib/dpkg/status ]; then echo "PASS"; exit 0; fi
if [ ! -x /usr/bin/dpkg ] || ! dpkg --get-selections | grep -q "^openssh-server\s*install"; then echo "PASS"; exit 0; fi
for file in /etc/ssh/ssh_host.*key; do
if [ ! -f "$file" ]; then continue; fi
mode=$(stat -c "%a" "$file")
if [ "$mode" -ge 601 ]; then echo "FAIL"; exit 1; fi
done
echo "PASS"
exit 0