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