A vulnerability exists where if a user opens a locally saved HTML file, this file can use file: URIs to access other files in the same directory or sub-directories if the names are known or guessed. The Fetch API can then be used to read the contents of any files stored in these directories and they may uploaded to a server. It was demonstrated that in combination with a popular Android messaging app, if a malicious HTML attachment is sent to a user and they opened that attachment in Firefox, due to that app's predictable pattern for locally-saved file names, it is possible to read attachments the victim received from other correspondents. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.
CVSS Details
- CVSS 3.1 Base Score: 6.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade firefox-esr | Nov 8, 2019 | Jul 23, 2019 |
| Amazon Linux Ami 2 | — | Upgrade thunderbirdUpgrade thunderbird-debuginfo | Apr 27, 2020 | Jul 23, 2019 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jul 23, 2019 |
| Centos_linux | — | Upgrade thunderbirdUpgrade firefox-debugsourceUpgrade firefoxUpgrade thunderbird-debuginfoUpgrade thunderbird-debugsourceUpgrade firefox-debuginfo | Jul 16, 2019 | Jul 9, 2019 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Jul 15, 2019 | Jul 15, 2019 |
| Freebsd | — | Upgrade thunderbirdUpgrade waterfoxUpgrade linux-seamonkeyUpgrade firefox-esrUpgrade linux-firefoxUpgrade firefoxUpgrade seamonkeyUpgrade linux-thunderbirdUpgrade libxul | Jul 11, 2019 | Jul 9, 2019 |
| Gentoo Linux | — | Upgrade www-client/firefox.Upgrade mail-client/thunderbird-bin.Upgrade mail-client/thunderbird.Upgrade www-client/firefox-bin. | Aug 16, 2019 | Jul 23, 2019 |
| Oracle Solaris | — | Upgrade mail/thunderbird to version 60.8.0-11.4.12.0.1.3.0 on Solaris 11.4Upgrade web/data/firefox-bookmarks to version 60.8.0-11.4.12.0.1.3.0 on Solaris 11.4Upgrade web/browser/firefox to version 60.8.0-11.4.12.0.1.3.0 on Solaris 11.4Upgrade mail/thunderbird/plugin/thunderbird-lightning to version 60.8.0-11.4.12.0.1.3.0 on Solaris 11.4 | Aug 21, 2019 | Jul 23, 2019 |
| Oracle_linux | — | Upgrade thunderbirdUpgrade firefox | Jul 12, 2019 | Jul 10, 2019 |
| Redhat_linux | — | Upgrade thunderbirdUpgrade thunderbird-debugsourceUpgrade firefox-debuginfoUpgrade thunderbird-debuginfoNo solution existsUpgrade firefox-debugsourceUpgrade firefox | Jul 12, 2019 | Jul 11, 2019 |
| Suse | — | Upgrade libsoftokn3Upgrade mozilla-nss-sysinitUpgrade MozillaFirefox-develUpgrade libfirefox-gthread-2_0-0Upgrade firefox-gtk3-immodules-tigrignaUpgrade mozilla-nsprUpgrade MozillaThunderbird-translations-otherUpgrade firefox-gtk3-branding-upstreamUpgrade libsoftokn3-32bitUpgrade firefox-gtk3-langUpgrade mozillafirefox-branding-sleUpgrade MozillaFirefox-translations-commonUpgrade mozilla-nssUpgrade firefox-gtk3-immodule-vietnameseUpgrade mozilla-nspr-32bitUpgrade mozilla-nss-sysinit-32bitUpgrade MozillaThunderbird-buildsymbolsUpgrade firefox-gtk3-dataUpgrade mozilla-nspr-develUpgrade firefox-gtk3-immodule-multipressUpgrade firefox-libffi7Upgrade firefox-libgtk-3-0Upgrade firefox-libffi4Upgrade firefox-gtk3-immodule-thaiUpgrade enigmailUpgrade MozillaThunderbirdUpgrade firefox-libharfbuzz0Upgrade firefox-gdk-pixbuf-query-loadersUpgrade firefox-glib2-langUpgrade firefox-gtk3-immodule-inuktitutUpgrade MozillaFirefox-translations-otherUpgrade firefox-libgdk_pixbuf-2_0-0Upgrade firefox-gio-branding-upstreamUpgrade libfreebl3-32bitUpgrade libsoftokn3-hmac-32bitUpgrade mozillafirefox-buildsymbolsUpgrade libsoftokn3-hmacUpgrade mozilla-nss-develUpgrade firefox-gtk3-immodule-ximUpgrade libfirefox-gmodule-2_0-0Upgrade libfirefox-gobject-2_0-0Upgrade firefox-libpango-1_0-0Upgrade libfirefox-glib-2_0-0Upgrade mozilla-nss-certsUpgrade firefox-gtk3-toolsUpgrade MozillaThunderbird-translations-commonUpgrade libfreebl3Upgrade firefox-gdk-pixbuf-thumbnailerUpgrade MozillaFirefox-branding-SLEDUpgrade libfreebl3-hmac-32bitUpgrade mozilla-nss-toolsUpgrade MozillaFirefoxUpgrade mozilla-nss-certs-32bitUpgrade libfirefox-gio-2_0-0Upgrade mozillafirefox-branding-upstreamUpgrade firefox-libcairo2Upgrade firefox-glib2-toolsUpgrade firefox-gtk3-immodule-amharicUpgrade firefox-atk-langUpgrade libfreebl3-hmacUpgrade firefox-gdk-pixbuf-langUpgrade firefox-libcairo-gobject2Upgrade firefox-libatk-1_0-0Upgrade mozilla-nss-32bit | Jul 18, 2019 | Jul 9, 2019 |
| Ubuntu | — | Upgrade thunderbirdUpgrade firefox | Jul 13, 2019 | Jul 9, 2019 |
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