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.rhel9os:def:257993
# RHEL 9 must not allow users to override SSH environment variables.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.
# Check to see if PermitUserEnvironment is set to no in /etc/ssh/sshd_config and /etc/ssh/sshd_config.d/*.conf
# textfilecontent54_object (textfilecontent54_test)
test_1() {
( (sed -En 's/^(?i)\s*PermitUserEnvironment\s+(\w+)$/\1/p' '/etc/ssh/sshd_config') | grep -Pq '^(no|"no")$' ) || ( (grep -rhP --include='*.conf' '^(?i)\s*PermitUserEnvironment\s+(\w+)$' '/etc/ssh/sshd_config.d' | sed -En 's/^(?i)\s*PermitUserEnvironment\s+(\w+)$/\1/p') | grep -Pq '^(no|"no")$' )
}
if test_1; then
echo "PASS"
else
echo "FAIL"
fi Assessment Script Powered by AISandbox-executed
A standalone Shell script to assess this control automatically. Review before running it in your environment.
Syntax-checked and actually executed in an isolated sandbox (not the real system this checks) — confirmed to run without errors.
#!/bin/sh
# OVAL Definition: oval:mil.disa.stig.rhel9os:def:257993
if [ ! -f "/etc/ssh/sshd_config" ]; then
echo "PASS"
exit 0
fi
if grep -iqF "^permituserenvironment[[:space:]]no$" /etc/ssh/sshd_config; then
echo "PASS"
exit 0
fi
if [ -d "/etc/ssh/sshd_config.d" ]; then
for file in /etc/ssh/sshd_config.d/*.conf; do
if [ -f "$file" ]; then
if grep -iqF "^permituserenvironment[[:space:]]no$" "$file"; then
echo "PASS"
exit 0
fi
fi
done
fi
echo "FAIL"
exit 1