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The Mozilla Maintenance Service does not guard against files being hardlinked to another file in the updates directory, allowing for the replacement of local files, including the Maintenance Service executable, which is run with privileged access. Additionally, there was a race condition during checks for junctions and symbolic links by the Maintenance Service, allowing for potential local file and directory manipulation to be undetected in some circumstances. This allows for potential privilege escalation by a user with unprivileged local access. <br>*Note: These attacks requires local system access and only affects Windows. Other operating systems are not affected.*. This vulnerability affects Firefox < 69 and Firefox ESR < 68.1.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Freebsd | — | Upgrade waterfoxUpgrade thunderbirdUpgrade linux-thunderbirdUpgrade linux-seamonkeyUpgrade firefox-esrUpgrade firefoxUpgrade linux-firefoxUpgrade seamonkeyUpgrade libxul | Sep 4, 2019 | Sep 3, 2019 |
| Mfsa2019 25 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 69.0 | 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 |
| Oracle Solaris | — | Upgrade web/browser/firefox to version 78.3.0-11.4.27.0.1.82.0 on Solaris 11.4Upgrade web/data/firefox-bookmarks to version 78.3.0-11.4.27.0.1.82.0 on Solaris 11.4Upgrade mail/thunderbird to version 78.3.0-11.4.27.0.1.82.0 on Solaris 11.4Upgrade mail/thunderbird/plugin/thunderbird-lightning to version 68.12.0-11.4.27.0.1.82.0 on Solaris 11.4 | Jan 19, 2021 | Sep 27, 2019 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Sep 27, 2019 |
| Suse | — | Upgrade firefox-gtk3-immodule-inuktitutUpgrade firefox-gtk3-dataUpgrade libfirefox-gmodule-2_0-0Upgrade libfirefox-gthread-2_0-0Upgrade mozilla-nspr-develUpgrade firefox-libharfbuzz0Upgrade firefox-gtk3-immodules-tigrignaUpgrade MozillaFirefoxUpgrade firefox-gtk3-immodule-vietnameseUpgrade mozillafirefox-branding-sleUpgrade MozillaFirefox-translations-commonUpgrade libsoftokn3-32bitUpgrade firefox-libffi7Upgrade firefox-gtk3-immodule-thaiUpgrade firefox-glib2-langUpgrade firefox-libgdk_pixbuf-2_0-0Upgrade firefox-gtk3-branding-upstreamUpgrade mozilla-nsprUpgrade firefox-gtk3-immodule-multipressUpgrade MozillaFirefox-develUpgrade mozilla-nss-develUpgrade MozillaFirefox-branding-SLEDUpgrade libfirefox-gobject-2_0-0Upgrade firefox-gio-branding-upstreamUpgrade libfreebl3Upgrade mozilla-nspr-32bitUpgrade firefox-libpango-1_0-0Upgrade firefox-gtk3-immodule-amharicUpgrade mozilla-nss-32bitUpgrade firefox-libffi4Upgrade firefox-gdk-pixbuf-query-loadersUpgrade firefox-libcairo2Upgrade libfirefox-glib-2_0-0Upgrade mozilla-nss-toolsUpgrade mozilla-nssUpgrade mozillafirefox-branding-upstreamUpgrade libfirefox-gio-2_0-0Upgrade firefox-gtk3-immodule-ximUpgrade firefox-glib2-toolsUpgrade mozillafirefox-buildsymbolsUpgrade firefox-atk-langUpgrade firefox-libcairo-gobject2Upgrade MozillaFirefox-translations-otherUpgrade mozilla-nss-certs-32bitUpgrade firefox-libgtk-3-0Upgrade firefox-gtk3-langUpgrade firefox-gdk-pixbuf-langUpgrade libfreebl3-32bitUpgrade firefox-gtk3-toolsUpgrade libsoftokn3Upgrade firefox-gdk-pixbuf-thumbnailerUpgrade mozilla-nss-certsUpgrade firefox-libatk-1_0-0 | Oct 8, 2019 | Sep 3, 2019 |
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