Navigation events were not fully adhering to the W3C's "Navigation-Timing Level 2" draft specification in some instances for the unload event, which restricts access to detailed timing attributes to only be same-origin. This resulted in potential cross-origin information exposure of history through timing side-channel attacks. This vulnerability affects Firefox < 69, Thunderbird < 68.1, Thunderbird < 60.9, Firefox ESR < 60.9, and Firefox ESR < 68.1.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade firefox-esrUpgrade firefox | Nov 8, 2019 | Sep 27, 2019 |
| Amazon Linux Ami 2 | — | Upgrade thunderbird-debuginfoUpgrade thunderbird | Apr 27, 2020 | Sep 27, 2019 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Sep 27, 2019 |
| Centos_linux | — | Upgrade thunderbird-debugsourceUpgrade thunderbird-debuginfoUpgrade firefoxUpgrade firefox-debuginfoUpgrade firefox-debugsourceUpgrade thunderbird | Sep 5, 2019 | Sep 4, 2019 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Sep 9, 2019 | Sep 9, 2019 |
| Freebsd | — | Upgrade thunderbirdUpgrade linux-seamonkeyUpgrade firefox-esrUpgrade linux-thunderbirdUpgrade linux-firefoxUpgrade waterfoxUpgrade libxulUpgrade firefoxUpgrade seamonkey | Sep 4, 2019 | Sep 3, 2019 |
| Gentoo Linux | — | Upgrade www-client/firefox.Upgrade www-client/firefox-bin. | Nov 25, 2019 | Sep 27, 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 the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 68.1 | 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 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 68.1 | Sep 16, 2021 | Sep 27, 2019 |
| Oracle Solaris | — | Upgrade 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 mail/thunderbird/plugin/thunderbird-lightning to version 60.9.0-11.4.14.0.1.3.0 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 |
| Oracle_linux | — | Upgrade thunderbirdUpgrade firefox | Sep 11, 2019 | Sep 3, 2019 |
| Redhat_linux | — | Upgrade thunderbird-debugsourceUpgrade firefox-debugsourceUpgrade thunderbird-debuginfoUpgrade firefoxNo solution existsUpgrade thunderbirdUpgrade firefox-debuginfo | Sep 5, 2019 | Sep 4, 2019 |
| Suse | — | Upgrade mozilla-nspr-develUpgrade firefox-gtk3-immodule-multipressUpgrade firefox-libgtk-3-0Upgrade firefox-gtk3-langUpgrade firefox-gdk-pixbuf-langUpgrade libsoftokn3-32bitUpgrade firefox-atk-langUpgrade firefox-gtk3-immodule-inuktitutUpgrade MozillaFirefox-develUpgrade firefox-libffi4Upgrade MozillaThunderbirdUpgrade libfirefox-gobject-2_0-0Upgrade firefox-gio-branding-upstreamUpgrade firefox-gtk3-immodule-thaiUpgrade firefox-gtk3-dataUpgrade firefox-libatk-1_0-0Upgrade firefox-gtk3-immodules-tigrignaUpgrade firefox-gtk3-immodule-vietnameseUpgrade MozillaFirefox-translations-commonUpgrade enigmailUpgrade firefox-gtk3-immodule-amharicUpgrade firefox-gdk-pixbuf-query-loadersUpgrade mozillafirefox-buildsymbolsUpgrade MozillaThunderbird-translations-otherUpgrade MozillaThunderbird-translations-commonUpgrade firefox-libcairo-gobject2Upgrade firefox-libffi7Upgrade libfirefox-gthread-2_0-0Upgrade mozillafirefox-branding-upstreamUpgrade firefox-libharfbuzz0Upgrade mozillafirefox-branding-sleUpgrade firefox-libgdk_pixbuf-2_0-0Upgrade mozilla-nssUpgrade firefox-glib2-toolsUpgrade mozilla-nss-develUpgrade mozilla-nss-32bitUpgrade mozilla-nspr-32bitUpgrade libfreebl3Upgrade MozillaThunderbird-buildsymbolsUpgrade libsoftokn3Upgrade firefox-glib2-langUpgrade firefox-gtk3-toolsUpgrade firefox-libcairo2Upgrade MozillaFirefox-branding-SLEDUpgrade libfirefox-glib-2_0-0Upgrade firefox-gtk3-branding-upstreamUpgrade firefox-gtk3-immodule-ximUpgrade firefox-libpango-1_0-0Upgrade MozillaFirefoxUpgrade MozillaFirefox-translations-otherUpgrade mozilla-nss-certsUpgrade mozilla-nss-certs-32bitUpgrade mozilla-nss-toolsUpgrade libfreebl3-32bitUpgrade libfirefox-gmodule-2_0-0Upgrade firefox-gdk-pixbuf-thumbnailerUpgrade libfirefox-gio-2_0-0Upgrade mozilla-nspr | Sep 18, 2019 | Sep 3, 2019 |
| Ubuntu | — | Upgrade firefoxUpgrade thunderbird | Sep 5, 2019 | Sep 3, 2019 |
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