SV-223165r612236: Firefox is configured to allow JavaScript to raise or lower windows. | Mozilla Firefox Security Technical Implementation Guide

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Assessment Title

Rule Text

Firefox is configured to allow JavaScript to raise or lower windows.

Description

Discussion Text

JavaScript can make changes to the browser’s appearance. Allowing a website to use JavaScript to raise and lower browser windows may disguise an attack. Browser windows may not be set as active via JavaScript.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000381SV-16927V-15985

References

DPMS Target Mozilla Firefox DISA DPMS Target Mozilla Firefox 4097

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.

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.mozilla.firefox.rhel:def:140
if [ ! -f "$HOME/.mozilla/firefox/prefs.js" ]; then echo "PASS"; exit 0; fi
if [ ! -s "$HOME/.mozilla/firefox/prefs.js" ]; then echo "FAIL"; exit 1; fi
if grep -q "^//.*" "$HOME/.mozilla/firefox/prefs.js"; then :; else echo "FAIL"; exit 1; fi
if grep -q "pref(\"general.config.obscure_value\", 0);" "$HOME/.mozilla/firefox/prefs.js"; then :; else echo "FAIL"; exit 1; fi
echo "PASS"; exit 0

Remediation

Ensure the preference  "dom.disable_window_flip"  is set and locked to the value of “true”.