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 thunderbird-debugsourceUpgrade firefoxUpgrade thunderbird-debuginfoUpgrade firefox-debuginfo | Jul 16, 2019 | Jul 9, 2019 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Jul 15, 2019 | Jul 15, 2019 |
| Freebsd | — | Upgrade seamonkeyUpgrade thunderbirdUpgrade linux-firefoxUpgrade linux-seamonkeyUpgrade firefoxUpgrade firefox-esrUpgrade waterfoxUpgrade libxulUpgrade linux-thunderbird | Jul 11, 2019 | Jul 9, 2019 |
| Gentoo Linux | — | Upgrade mail-client/thunderbird.Upgrade www-client/firefox-bin.Upgrade mail-client/thunderbird-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 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 11.4 | Aug 21, 2019 | Jul 23, 2019 |
| Oracle_linux | — | Upgrade firefoxUpgrade thunderbird | Jul 12, 2019 | Jul 10, 2019 |
| Redhat_linux | — | No solution existsUpgrade firefox-debugsourceUpgrade firefoxUpgrade thunderbird-debugsourceUpgrade thunderbirdUpgrade firefox-debuginfoUpgrade thunderbird-debuginfo | Jul 12, 2019 | Jul 11, 2019 |
| Suse | — | Upgrade firefox-gtk3-immodule-amharicUpgrade libfirefox-gio-2_0-0Upgrade mozilla-nss-certsUpgrade firefox-gio-branding-upstreamUpgrade libfirefox-gmodule-2_0-0Upgrade firefox-libpango-1_0-0Upgrade firefox-atk-langUpgrade libsoftokn3-hmacUpgrade libfirefox-glib-2_0-0Upgrade mozillafirefox-buildsymbolsUpgrade libfreebl3-32bitUpgrade mozilla-nss-32bitUpgrade mozilla-nss-toolsUpgrade mozillafirefox-branding-upstreamUpgrade libfreebl3-hmacUpgrade firefox-libgdk_pixbuf-2_0-0Upgrade firefox-libcairo2Upgrade firefox-gtk3-toolsUpgrade MozillaThunderbird-translations-commonUpgrade firefox-gdk-pixbuf-langUpgrade firefox-gdk-pixbuf-thumbnailerUpgrade libfreebl3Upgrade libfreebl3-hmac-32bitUpgrade firefox-libatk-1_0-0Upgrade MozillaFirefox-branding-SLEDUpgrade firefox-gtk3-immodule-ximUpgrade libsoftokn3-hmac-32bitUpgrade libfirefox-gobject-2_0-0Upgrade mozilla-nss-develUpgrade firefox-libcairo-gobject2Upgrade MozillaFirefoxUpgrade mozilla-nss-certs-32bitUpgrade firefox-glib2-toolsUpgrade firefox-gtk3-dataUpgrade firefox-libharfbuzz0Upgrade firefox-gtk3-branding-upstreamUpgrade mozilla-nss-sysinit-32bitUpgrade mozillafirefox-branding-sleUpgrade MozillaThunderbird-translations-otherUpgrade mozilla-nsprUpgrade firefox-gtk3-immodules-tigrignaUpgrade firefox-gtk3-immodule-vietnameseUpgrade firefox-gtk3-langUpgrade libfirefox-gthread-2_0-0Upgrade libsoftokn3-32bitUpgrade MozillaFirefox-develUpgrade libsoftokn3Upgrade mozilla-nss-sysinitUpgrade firefox-gtk3-immodule-inuktitutUpgrade MozillaFirefox-translations-otherUpgrade firefox-gtk3-immodule-multipressUpgrade mozilla-nssUpgrade mozilla-nspr-32bitUpgrade MozillaFirefox-translations-commonUpgrade firefox-libgtk-3-0Upgrade firefox-libffi7Upgrade enigmailUpgrade firefox-gdk-pixbuf-query-loadersUpgrade firefox-glib2-langUpgrade firefox-gtk3-immodule-thaiUpgrade MozillaThunderbirdUpgrade mozilla-nspr-develUpgrade MozillaThunderbird-buildsymbolsUpgrade firefox-libffi4 | Jul 18, 2019 | Jul 9, 2019 |
| Ubuntu | — | Upgrade firefoxUpgrade thunderbird | Jul 13, 2019 | Jul 9, 2019 |
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