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-debuginfoUpgrade thunderbird-debugsourceUpgrade firefoxUpgrade thunderbird-debuginfoUpgrade firefox-debugsource | Jul 16, 2019 | Jul 9, 2019 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Jul 15, 2019 | Jul 15, 2019 |
| Freebsd | — | Upgrade thunderbirdUpgrade linux-firefoxUpgrade linux-seamonkeyUpgrade firefox-esrUpgrade seamonkeyUpgrade firefoxUpgrade waterfoxUpgrade libxulUpgrade linux-thunderbird | 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 | — | No solution existsUpgrade firefox-debugsourceUpgrade firefoxUpgrade thunderbirdUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoUpgrade thunderbird-debugsource | Jul 12, 2019 | Jul 11, 2019 |
| Suse | — | Upgrade firefox-gtk3-branding-upstreamUpgrade mozilla-nssUpgrade firefox-libffi7Upgrade MozillaThunderbirdUpgrade mozilla-nss-develUpgrade firefox-libcairo-gobject2Upgrade libfreebl3-hmac-32bitUpgrade MozillaFirefox-branding-SLEDUpgrade libsoftokn3-hmac-32bitUpgrade mozillafirefox-buildsymbolsUpgrade firefox-gdk-pixbuf-langUpgrade firefox-libatk-1_0-0Upgrade firefox-libcairo2Upgrade libfirefox-gmodule-2_0-0Upgrade libfirefox-glib-2_0-0Upgrade mozillafirefox-branding-upstreamUpgrade MozillaFirefoxUpgrade libfreebl3-hmacUpgrade mozilla-nss-toolsUpgrade firefox-atk-langUpgrade libfirefox-gio-2_0-0Upgrade libsoftokn3-hmacUpgrade firefox-libpango-1_0-0Upgrade mozilla-nss-certs-32bitUpgrade firefox-gio-branding-upstreamUpgrade mozilla-nss-certsUpgrade mozilla-nss-32bitUpgrade firefox-gdk-pixbuf-thumbnailerUpgrade firefox-libgdk_pixbuf-2_0-0Upgrade MozillaThunderbird-translations-commonUpgrade firefox-glib2-toolsUpgrade libfreebl3Upgrade firefox-gtk3-toolsUpgrade libfreebl3-32bitUpgrade firefox-gtk3-immodule-amharicUpgrade libfirefox-gobject-2_0-0Upgrade firefox-gtk3-immodule-ximUpgrade firefox-gtk3-immodule-multipressUpgrade libfirefox-gthread-2_0-0Upgrade mozilla-nsprUpgrade mozilla-nss-sysinit-32bitUpgrade firefox-gtk3-dataUpgrade MozillaFirefox-translations-otherUpgrade firefox-gtk3-immodule-inuktitutUpgrade mozillafirefox-branding-sleUpgrade mozilla-nspr-32bitUpgrade MozillaFirefox-translations-commonUpgrade firefox-glib2-langUpgrade firefox-gdk-pixbuf-query-loadersUpgrade libsoftokn3-32bitUpgrade MozillaFirefox-develUpgrade firefox-gtk3-immodules-tigrignaUpgrade firefox-gtk3-langUpgrade firefox-libffi4Upgrade MozillaThunderbird-buildsymbolsUpgrade MozillaThunderbird-translations-otherUpgrade firefox-libharfbuzz0Upgrade firefox-gtk3-immodule-thaiUpgrade firefox-libgtk-3-0Upgrade mozilla-nspr-develUpgrade enigmailUpgrade firefox-gtk3-immodule-vietnameseUpgrade libsoftokn3Upgrade mozilla-nss-sysinit | Jul 18, 2019 | Jul 9, 2019 |
| Ubuntu | — | Upgrade thunderbirdUpgrade firefox | Jul 13, 2019 | Jul 9, 2019 |
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