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 thunderbird-debuginfoUpgrade thunderbird | 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 firefox-debuginfoUpgrade thunderbird-debugsourceUpgrade thunderbird-debuginfo | Jul 16, 2019 | Jul 9, 2019 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Jul 15, 2019 | Jul 15, 2019 |
| Freebsd | — | Upgrade firefox-esrUpgrade waterfoxUpgrade firefoxUpgrade seamonkeyUpgrade linux-seamonkeyUpgrade thunderbirdUpgrade linux-firefoxUpgrade libxulUpgrade linux-thunderbird | Jul 11, 2019 | Jul 9, 2019 |
| Gentoo Linux | — | Upgrade mail-client/thunderbird-bin.Upgrade mail-client/thunderbird.Upgrade www-client/firefox-bin.Upgrade www-client/firefox. | Aug 16, 2019 | Jul 23, 2019 |
| Oracle Solaris | — | Upgrade mail/thunderbird/plugin/thunderbird-lightning 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 web/data/firefox-bookmarks to version 60.8.0-11.4.12.0.1.3.0 on Solaris 11.4Upgrade mail/thunderbird 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 firefoxUpgrade thunderbird | Jul 12, 2019 | Jul 10, 2019 |
| Redhat_linux | — | Upgrade thunderbird-debuginfoUpgrade thunderbirdUpgrade thunderbird-debugsourceUpgrade firefox-debuginfoUpgrade firefox-debugsourceNo solution existsUpgrade firefox | Jul 12, 2019 | Jul 11, 2019 |
| Suse | — | Upgrade libfirefox-gmodule-2_0-0Upgrade libfreebl3-hmac-32bitUpgrade mozillafirefox-translations-otherUpgrade mozilla-nss-develUpgrade firefox-gtk3-immodule-ximUpgrade libsoftokn3-hmacUpgrade firefox-libgdk_pixbuf-2_0-0Upgrade mozilla-nss-toolsUpgrade mozillathunderbird-translations-otherUpgrade libfreebl3-32bitUpgrade libfirefox-gobject-2_0-0Upgrade firefox-gtk3-immodule-amharicUpgrade mozilla-nss-32bitUpgrade mozilla-nss-certs-32bitUpgrade libfreebl3Upgrade firefox-gdk-pixbuf-thumbnailerUpgrade firefox-libatk-1_0-0Upgrade libfirefox-glib-2_0-0Upgrade mozillafirefox-buildsymbolsUpgrade firefox-gdk-pixbuf-langUpgrade mozilla-nss-certsUpgrade firefox-libcairo-gobject2Upgrade firefox-libpango-1_0-0Upgrade firefox-gio-branding-upstreamUpgrade mozillafirefox-develUpgrade firefox-libcairo2Upgrade firefox-glib2-toolsUpgrade mozillafirefox-branding-upstreamUpgrade libfirefox-gio-2_0-0Upgrade firefox-atk-langUpgrade libsoftokn3-hmac-32bitUpgrade mozillathunderbirdUpgrade firefox-gtk3-toolsUpgrade mozillafirefoxUpgrade libfreebl3-hmacUpgrade mozillathunderbird-translations-commonUpgrade libsoftokn3Upgrade firefox-libffi7Upgrade firefox-gdk-pixbuf-query-loadersUpgrade firefox-libharfbuzz0Upgrade mozillafirefox-translations-commonUpgrade MozillaThunderbird-buildsymbolsUpgrade firefox-libffi4Upgrade firefox-libgtk-3-0Upgrade mozilla-nspr-develUpgrade mozilla-nss-sysinitUpgrade mozilla-nssUpgrade firefox-gtk3-dataUpgrade firefox-gtk3-immodules-tigrignaUpgrade mozilla-nsprUpgrade firefox-gtk3-langUpgrade mozillafirefox-branding-sledUpgrade firefox-gtk3-immodule-thaiUpgrade libfirefox-gthread-2_0-0Upgrade firefox-gtk3-immodule-vietnameseUpgrade mozilla-nspr-32bitUpgrade firefox-gtk3-immodule-multipressUpgrade mozilla-nss-sysinit-32bitUpgrade firefox-gtk3-immodule-inuktitutUpgrade firefox-glib2-langUpgrade mozillafirefox-branding-sleUpgrade libsoftokn3-32bitUpgrade firefox-gtk3-branding-upstreamUpgrade enigmail | Jul 18, 2019 | Jul 9, 2019 |
| Ubuntu | — | Upgrade firefoxUpgrade thunderbird | Jul 13, 2019 | Jul 9, 2019 |
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