File downloads encoded with "blob:" and "data:" URL elements bypassed normal file download checks though the Phishing and Malware Protection feature and its block lists of suspicious sites and files. This would allow malicious sites to lure users into downloading executables that would otherwise be detected as suspicious. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.0 Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade firefox-esr | Dec 1, 2017 | Oct 25, 2017 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jun 11, 2018 |
| Centos_linux | — | Upgrade firefoxUpgrade thunderbirdUpgrade firefox-debuginfoUpgrade thunderbird-debuginfo | Oct 2, 2017 | Sep 29, 2017 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Sep 30, 2017 | Sep 29, 2017 |
| Freebsd | — | Upgrade linux-thunderbirdUpgrade libxulUpgrade thunderbirdUpgrade firefoxUpgrade linux-seamonkeyUpgrade linux-firefoxUpgrade seamonkeyUpgrade firefox-esr | Sep 29, 2017 | Sep 29, 2017 |
| Gentoo Linux | — | Upgrade www-client/firefox-bin.Upgrade mail-client/thunderbird.Upgrade mail-client/thunderbird-bin.Upgrade www-client/firefox. | Feb 20, 2018 | Feb 20, 2018 |
| Mfsa2017 21 | — | Upgrade to Mozilla Firefox version 56.0Upgrade to the latest version of Mozilla Firefox | Jul 12, 2018 | Jun 11, 2018 |
| Mfsa2017 22 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 52.4 | Sep 29, 2017 | Sep 28, 2017 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 52.4 | Oct 11, 2017 | Oct 9, 2017 |
| Oracle Solaris | — | Upgrade mail/thunderbird/plugin/thunderbird-lightning to version 52.4.0-0.175.3.26.0.4.0 on Solaris 11.3Upgrade web/browser/firefox to version 52.4.0-0.175.3.25.0.3.0 on Solaris 11.3Upgrade web/browser/firefox/plugin/firefox-java to version 52.4.0-0.175.3.25.0.3.0 on Solaris 11.3Upgrade mail/thunderbird to version 52.4.0-0.175.3.26.0.4.0 on Solaris 11.3Upgrade web/data/firefox-bookmarks to version 52.4.0-0.175.3.25.0.3.0 on Solaris 11.3 | Nov 30, 2017 | Nov 30, 2017 |
| Oracle_linux | — | Upgrade thunderbirdUpgrade firefox | Sep 29, 2017 | Sep 28, 2017 |
| Redhat_linux | — | Upgrade firefoxUpgrade thunderbirdUpgrade thunderbird-debuginfoUpgrade firefox-debuginfo | Oct 4, 2017 | Sep 29, 2017 |
| Suse | — | Upgrade libfreebl3-32bitUpgrade libfreebl3Upgrade libsoftokn3-x86Upgrade MozillaFirefoxUpgrade mozilla-nss-sysinit-32bitUpgrade MozillaThunderbird-buildsymbolsUpgrade MozillaFirefox-translations-commonUpgrade libfreebl3-hmacUpgrade mozilla-nss-32bitUpgrade MozillaFirefox-translationsUpgrade mozilla-nss-x86Upgrade libsoftokn3-32bitUpgrade MozillaThunderbird-translations-otherUpgrade mozilla-nss-certsUpgrade libsoftokn3Upgrade MozillaFirefox-develUpgrade libfreebl3-hmac-32bitUpgrade mozilla-nss-toolsUpgrade mozilla-nss-sysinitUpgrade libsoftokn3-hmac-32bitUpgrade mozilla-nss-certs-32bitUpgrade MozillaThunderbirdUpgrade libsoftokn3-hmacUpgrade MozillaThunderbird-translations-commonUpgrade mozilla-nssUpgrade MozillaThunderbird-develUpgrade libfreebl3-x86Upgrade MozillaFirefox-translations-otherUpgrade mozilla-nss-devel | Oct 2, 2017 | Sep 29, 2017 |
| Ubuntu | — | Upgrade firefoxUpgrade thunderbird | Oct 3, 2017 | Sep 29, 2017 |
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