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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 firefoxUpgrade firefox-esr | 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 firefox-debugsourceUpgrade thunderbird-debugsourceUpgrade firefoxUpgrade thunderbird-debuginfoUpgrade thunderbirdUpgrade firefox-debuginfo | Sep 5, 2019 | Sep 4, 2019 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Sep 9, 2019 | Sep 9, 2019 |
| Freebsd | — | Upgrade seamonkeyUpgrade firefoxUpgrade libxulUpgrade waterfoxUpgrade linux-seamonkeyUpgrade linux-firefoxUpgrade linux-thunderbirdUpgrade thunderbirdUpgrade firefox-esr | Sep 4, 2019 | Sep 3, 2019 |
| Gentoo Linux | — | Upgrade www-client/firefox-bin.Upgrade www-client/firefox. | Nov 25, 2019 | Sep 27, 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 Mozilla Firefox ESR version 60.9Upgrade to the latest version of Mozilla Firefox | Sep 4, 2019 | Sep 3, 2019 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 68.1Upgrade to the latest version of Mozilla Thunderbird | Sep 16, 2021 | Sep 27, 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 web/data/firefox-bookmarks to version 60.9.0-11.4.14.0.1.2.0 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 11.4 | Oct 16, 2019 | Sep 27, 2019 |
| Oracle_linux | — | Upgrade thunderbirdUpgrade firefox | Sep 11, 2019 | Sep 3, 2019 |
| Redhat_linux | — | No solution existsUpgrade firefoxUpgrade thunderbirdUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoUpgrade thunderbird-debugsourceUpgrade firefox-debugsource | Sep 5, 2019 | Sep 4, 2019 |
| Suse | — | Upgrade MozillaThunderbird-translations-otherUpgrade firefox-libcairo-gobject2Upgrade enigmailUpgrade firefox-gtk3-immodule-inuktitutUpgrade firefox-libffi4Upgrade firefox-libgtk-3-0Upgrade firefox-gtk3-langUpgrade mozillafirefox-branding-sleUpgrade libfirefox-gthread-2_0-0Upgrade firefox-gtk3-immodule-thaiUpgrade MozillaThunderbird-translations-commonUpgrade firefox-gtk3-immodule-amharicUpgrade mozillafirefox-buildsymbolsUpgrade MozillaThunderbirdUpgrade firefox-gtk3-immodule-multipressUpgrade MozillaFirefox-develUpgrade libsoftokn3-32bitUpgrade MozillaFirefox-translations-commonUpgrade mozilla-nspr-develUpgrade firefox-gio-branding-upstreamUpgrade firefox-gtk3-immodules-tigrignaUpgrade firefox-atk-langUpgrade firefox-libatk-1_0-0Upgrade firefox-gtk3-dataUpgrade firefox-gdk-pixbuf-query-loadersUpgrade firefox-gdk-pixbuf-langUpgrade firefox-gtk3-immodule-vietnameseUpgrade mozillafirefox-branding-upstreamUpgrade firefox-libffi7Upgrade firefox-libharfbuzz0Upgrade libfirefox-gobject-2_0-0Upgrade libfirefox-gio-2_0-0Upgrade firefox-libgdk_pixbuf-2_0-0Upgrade mozilla-nssUpgrade libfreebl3-32bitUpgrade firefox-glib2-toolsUpgrade mozilla-nss-develUpgrade libfreebl3Upgrade firefox-libcairo2Upgrade firefox-gtk3-branding-upstreamUpgrade firefox-glib2-langUpgrade mozilla-nss-certsUpgrade mozilla-nss-toolsUpgrade MozillaFirefox-translations-otherUpgrade firefox-libpango-1_0-0Upgrade MozillaFirefoxUpgrade firefox-gdk-pixbuf-thumbnailerUpgrade libfirefox-glib-2_0-0Upgrade mozilla-nsprUpgrade mozilla-nss-32bitUpgrade mozilla-nss-certs-32bitUpgrade MozillaFirefox-branding-SLEDUpgrade libfirefox-gmodule-2_0-0Upgrade mozilla-nspr-32bitUpgrade MozillaThunderbird-buildsymbolsUpgrade firefox-gtk3-toolsUpgrade libsoftokn3Upgrade firefox-gtk3-immodule-xim | Sep 18, 2019 | Sep 3, 2019 |
| Ubuntu | — | Upgrade firefoxUpgrade thunderbird | Sep 5, 2019 | Sep 3, 2019 |
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