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 thunderbird-debugsourceUpgrade firefox-debuginfoUpgrade thunderbird-debuginfoUpgrade firefox-debugsourceUpgrade firefox | Jul 16, 2019 | Jul 9, 2019 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Jul 15, 2019 | Jul 15, 2019 |
| Freebsd | — | Upgrade linux-thunderbirdUpgrade libxulUpgrade firefox-esrUpgrade seamonkeyUpgrade waterfoxUpgrade thunderbirdUpgrade firefoxUpgrade linux-firefoxUpgrade linux-seamonkey | Jul 11, 2019 | Jul 9, 2019 |
| Gentoo Linux | — | Upgrade mail-client/thunderbird.Upgrade mail-client/thunderbird-bin.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 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 11.4 | Aug 21, 2019 | Jul 23, 2019 |
| Oracle_linux | — | Upgrade thunderbirdUpgrade firefox | Jul 12, 2019 | Jul 10, 2019 |
| Redhat_linux | — | Upgrade firefox-debuginfoUpgrade thunderbird-debugsourceUpgrade thunderbird-debuginfoUpgrade thunderbirdNo solution existsUpgrade firefox-debugsourceUpgrade firefox | Jul 12, 2019 | Jul 11, 2019 |
| Suse | — | Upgrade firefox-libgtk-3-0Upgrade libsoftokn3Upgrade MozillaFirefox-translations-otherUpgrade mozilla-nspr-develUpgrade MozillaThunderbird-buildsymbolsUpgrade firefox-libffi4Upgrade firefox-glib2-langUpgrade enigmailUpgrade firefox-gtk3-immodule-thaiUpgrade MozillaThunderbirdUpgrade firefox-libffi7Upgrade libsoftokn3-32bitUpgrade firefox-gdk-pixbuf-query-loadersUpgrade firefox-libharfbuzz0Upgrade firefox-gtk3-dataUpgrade mozilla-nssUpgrade mozilla-nss-sysinitUpgrade firefox-gtk3-immodule-multipressUpgrade firefox-gtk3-branding-upstreamUpgrade mozilla-nspr-32bitUpgrade MozillaThunderbird-translations-otherUpgrade mozilla-nss-sysinit-32bitUpgrade mozilla-nsprUpgrade mozillafirefox-branding-sleUpgrade libfirefox-gthread-2_0-0Upgrade firefox-gtk3-immodules-tigrignaUpgrade firefox-gtk3-langUpgrade firefox-gtk3-immodule-vietnameseUpgrade MozillaFirefox-translations-commonUpgrade firefox-gtk3-immodule-inuktitutUpgrade MozillaFirefox-develUpgrade firefox-libgdk_pixbuf-2_0-0Upgrade firefox-gtk3-toolsUpgrade libfreebl3Upgrade firefox-gtk3-immodule-amharicUpgrade firefox-glib2-toolsUpgrade MozillaFirefoxUpgrade firefox-gdk-pixbuf-langUpgrade firefox-libcairo2Upgrade libfirefox-gobject-2_0-0Upgrade mozillafirefox-buildsymbolsUpgrade libfirefox-gmodule-2_0-0Upgrade libfreebl3-32bitUpgrade libsoftokn3-hmac-32bitUpgrade mozilla-nss-develUpgrade firefox-atk-langUpgrade firefox-gtk3-immodule-ximUpgrade libfirefox-gio-2_0-0Upgrade mozilla-nss-toolsUpgrade libsoftokn3-hmacUpgrade libfreebl3-hmacUpgrade mozillafirefox-branding-upstreamUpgrade libfreebl3-hmac-32bitUpgrade firefox-gdk-pixbuf-thumbnailerUpgrade MozillaFirefox-branding-SLEDUpgrade MozillaThunderbird-translations-commonUpgrade mozilla-nss-certsUpgrade libfirefox-glib-2_0-0Upgrade firefox-libpango-1_0-0Upgrade mozilla-nss-certs-32bitUpgrade firefox-gio-branding-upstreamUpgrade firefox-libcairo-gobject2Upgrade firefox-libatk-1_0-0Upgrade mozilla-nss-32bit | Jul 18, 2019 | Jul 9, 2019 |
| Ubuntu | — | Upgrade firefoxUpgrade thunderbird | Jul 13, 2019 | Jul 9, 2019 |
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