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The Firefox installer allows Firefox to be installed to a custom user writable location, leaving it unprotected from manipulation by unprivileged users or malware. If the Mozilla Maintenance Service is manipulated to update this unprotected location and the updated maintenance service in the unprotected location has been altered, the altered maintenance service can run with elevated privileges during the update process due to a lack of integrity checks. This allows for privilege escalation if the executable has been replaced locally. <br>*Note: This attack requires local system access and only affects Windows. Other operating systems are not affected.*. This vulnerability affects Firefox < 69, Firefox ESR < 60.9, and Firefox ESR < 68.1.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade firefox-esr | Nov 8, 2019 | Sep 27, 2019 |
| Freebsd | — | Upgrade libxulUpgrade firefoxUpgrade thunderbirdUpgrade seamonkeyUpgrade linux-thunderbirdUpgrade firefox-esrUpgrade linux-seamonkeyUpgrade linux-firefoxUpgrade waterfox | Sep 4, 2019 | Sep 3, 2019 |
| Mfsa2019 25 | — | Upgrade to Mozilla Firefox version 69.0Upgrade to the latest version of Mozilla Firefox | Sep 4, 2019 | Sep 3, 2019 |
| Mfsa2019 26 | — | Upgrade to Mozilla Firefox ESR version 68.1Upgrade to the latest version of Mozilla Firefox | Sep 4, 2019 | Sep 3, 2019 |
| Mfsa2019 27 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 60.9 | Sep 4, 2019 | Sep 3, 2019 |
| Oracle Solaris | — | Upgrade mail/thunderbird/plugin/thunderbird-lightning to version 60.9.0-11.4.14.0.1.3.0 on Solaris 11.4Upgrade mail/thunderbird to version 60.9.0-11.4.14.0.1.3.0 on Solaris 11.4Upgrade web/browser/firefox to version 60.9.0-11.4.14.0.1.2.0 on Solaris 11.4Upgrade web/data/firefox-bookmarks to version 60.9.0-11.4.14.0.1.2.0 on Solaris 11.4 | Oct 16, 2019 | Sep 27, 2019 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Sep 27, 2019 |
| Suse | — | Upgrade mozilla-nssUpgrade firefox-libffi4Upgrade libfirefox-gmodule-2_0-0Upgrade MozillaFirefox-develUpgrade firefox-gtk3-langUpgrade firefox-gtk3-immodules-tigrignaUpgrade firefox-gtk3-dataUpgrade firefox-glib2-langUpgrade MozillaFirefox-translations-commonUpgrade firefox-gdk-pixbuf-langUpgrade firefox-atk-langUpgrade firefox-gdk-pixbuf-query-loadersUpgrade firefox-libcairo-gobject2Upgrade libfirefox-gobject-2_0-0Upgrade mozillafirefox-branding-upstreamUpgrade firefox-gtk3-immodule-thaiUpgrade firefox-libgtk-3-0Upgrade mozillafirefox-buildsymbolsUpgrade firefox-gtk3-branding-upstreamUpgrade firefox-libharfbuzz0Upgrade MozillaFirefox-translations-otherUpgrade firefox-gio-branding-upstreamUpgrade libsoftokn3-32bitUpgrade firefox-gtk3-immodule-amharicUpgrade mozilla-nspr-develUpgrade firefox-libffi7Upgrade libfirefox-gthread-2_0-0Upgrade firefox-gtk3-immodule-multipressUpgrade libfirefox-glib-2_0-0Upgrade firefox-gdk-pixbuf-thumbnailerUpgrade MozillaFirefox-branding-SLEDUpgrade libfreebl3Upgrade firefox-libatk-1_0-0Upgrade firefox-libgdk_pixbuf-2_0-0Upgrade firefox-gtk3-toolsUpgrade libfirefox-gio-2_0-0Upgrade mozilla-nsprUpgrade MozillaFirefoxUpgrade libsoftokn3Upgrade firefox-gtk3-immodule-ximUpgrade mozilla-nss-toolsUpgrade mozilla-nss-certs-32bitUpgrade mozilla-nss-32bitUpgrade libfreebl3-32bitUpgrade firefox-gtk3-immodule-inuktitutUpgrade firefox-gtk3-immodule-vietnameseUpgrade firefox-glib2-toolsUpgrade mozilla-nspr-32bitUpgrade mozillafirefox-branding-sleUpgrade mozilla-nss-develUpgrade firefox-libcairo2Upgrade mozilla-nss-certsUpgrade firefox-libpango-1_0-0 | Sep 18, 2019 | Sep 3, 2019 |
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