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 thunderbird-debugsourceUpgrade thunderbird-debuginfoUpgrade firefoxUpgrade firefox-debugsourceUpgrade firefox-debuginfo | Jul 16, 2019 | Jul 9, 2019 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Jul 15, 2019 | Jul 15, 2019 |
| Freebsd | — | Upgrade firefox-esrUpgrade linux-firefoxUpgrade seamonkeyUpgrade thunderbirdUpgrade firefoxUpgrade linux-seamonkeyUpgrade waterfoxUpgrade libxulUpgrade linux-thunderbird | Jul 11, 2019 | Jul 9, 2019 |
| Gentoo Linux | — | Upgrade www-client/firefox-bin.Upgrade mail-client/thunderbird.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 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 thunderbirdUpgrade firefox | Jul 12, 2019 | Jul 10, 2019 |
| Redhat_linux | — | Upgrade firefox-debugsourceUpgrade firefoxNo solution existsUpgrade firefox-debuginfoUpgrade thunderbirdUpgrade thunderbird-debugsourceUpgrade thunderbird-debuginfo | Jul 12, 2019 | Jul 11, 2019 |
| Suse | — | Upgrade firefox-atk-langUpgrade libfreebl3-hmac-32bitUpgrade firefox-libatk-1_0-0Upgrade mozillafirefox-buildsymbolsUpgrade firefox-gdk-pixbuf-thumbnailerUpgrade mozilla-nss-toolsUpgrade MozillaFirefoxUpgrade firefox-gdk-pixbuf-langUpgrade firefox-glib2-toolsUpgrade firefox-libgdk_pixbuf-2_0-0Upgrade firefox-libcairo-gobject2Upgrade firefox-libcairo2Upgrade mozilla-nss-certs-32bitUpgrade libfirefox-glib-2_0-0Upgrade MozillaThunderbird-translations-commonUpgrade firefox-gio-branding-upstreamUpgrade libfirefox-gio-2_0-0Upgrade mozillafirefox-branding-upstreamUpgrade libsoftokn3-hmacUpgrade libfreebl3-hmacUpgrade libfreebl3Upgrade libsoftokn3-hmac-32bitUpgrade firefox-gtk3-toolsUpgrade firefox-libpango-1_0-0Upgrade mozilla-nss-certsUpgrade mozilla-nss-32bitUpgrade mozilla-nss-develUpgrade firefox-gtk3-immodule-ximUpgrade libfreebl3-32bitUpgrade firefox-gtk3-immodule-amharicUpgrade libfirefox-gobject-2_0-0Upgrade libfirefox-gmodule-2_0-0Upgrade MozillaFirefox-branding-SLEDUpgrade firefox-libharfbuzz0Upgrade mozilla-nsprUpgrade firefox-libffi7Upgrade mozilla-nss-sysinit-32bitUpgrade mozilla-nssUpgrade firefox-gtk3-immodule-multipressUpgrade MozillaThunderbird-translations-otherUpgrade MozillaFirefox-translations-otherUpgrade enigmailUpgrade MozillaThunderbirdUpgrade mozilla-nspr-32bitUpgrade firefox-gtk3-immodule-inuktitutUpgrade firefox-gdk-pixbuf-query-loadersUpgrade firefox-gtk3-immodule-thaiUpgrade mozillafirefox-branding-sleUpgrade firefox-gtk3-immodule-vietnameseUpgrade libsoftokn3-32bitUpgrade firefox-gtk3-branding-upstreamUpgrade libsoftokn3Upgrade mozilla-nss-sysinitUpgrade libfirefox-gthread-2_0-0Upgrade MozillaFirefox-translations-commonUpgrade firefox-gtk3-langUpgrade firefox-gtk3-immodules-tigrignaUpgrade MozillaFirefox-develUpgrade firefox-libffi4Upgrade firefox-glib2-langUpgrade MozillaThunderbird-buildsymbolsUpgrade mozilla-nspr-develUpgrade firefox-gtk3-dataUpgrade firefox-libgtk-3-0 | Jul 18, 2019 | Jul 9, 2019 |
| Ubuntu | — | Upgrade firefoxUpgrade thunderbird | Jul 13, 2019 | Jul 9, 2019 |
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