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 thunderbirdUpgrade firefox-esr | Sep 30, 2017 | Sep 29, 2017 |
| Freebsd | — | Upgrade linux-seamonkeyUpgrade linux-firefoxUpgrade firefox-esrUpgrade firefoxUpgrade seamonkeyUpgrade libxulUpgrade thunderbirdUpgrade linux-thunderbird | Sep 29, 2017 | Sep 29, 2017 |
| Gentoo Linux | — | Upgrade www-client/firefox.Upgrade mail-client/thunderbird-bin.Upgrade www-client/firefox-bin.Upgrade mail-client/thunderbird. | Feb 20, 2018 | Feb 20, 2018 |
| Mfsa2017 21 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 56.0 | Jul 12, 2018 | Jun 11, 2018 |
| Mfsa2017 22 | — | Upgrade to Mozilla Firefox ESR version 52.4Upgrade to the latest version of Mozilla Firefox | 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 web/data/firefox-bookmarks 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/browser/firefox/plugin/firefox-java to version 52.4.0-0.175.3.25.0.3.0 on Solaris 11.3Upgrade 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 11.3 | Nov 30, 2017 | Nov 30, 2017 |
| Oracle_linux | — | Upgrade firefoxUpgrade thunderbird | Sep 29, 2017 | Sep 28, 2017 |
| Redhat_linux | — | Upgrade firefoxUpgrade firefox-debuginfoUpgrade thunderbird-debuginfoUpgrade thunderbird | Oct 4, 2017 | Sep 29, 2017 |
| Suse | — | Upgrade MozillaThunderbird-translations-otherUpgrade mozilla-nss-certs-32bitUpgrade mozilla-nss-sysinitUpgrade libfreebl3-hmac-32bitUpgrade mozilla-nss-certsUpgrade MozillaFirefox-translations-otherUpgrade MozillaFirefox-develUpgrade MozillaThunderbird-develUpgrade MozillaThunderbirdUpgrade libsoftokn3Upgrade libsoftokn3-hmacUpgrade libsoftokn3-hmac-32bitUpgrade libfreebl3-x86Upgrade mozilla-nssUpgrade mozilla-nss-toolsUpgrade MozillaThunderbird-translations-commonUpgrade mozilla-nss-develUpgrade MozillaThunderbird-buildsymbolsUpgrade mozilla-nss-32bitUpgrade MozillaFirefox-translations-commonUpgrade mozilla-nss-x86Upgrade mozilla-nss-sysinit-32bitUpgrade libfreebl3-hmacUpgrade libsoftokn3-32bitUpgrade MozillaFirefox-translationsUpgrade MozillaFirefoxUpgrade libfreebl3-32bitUpgrade libfreebl3Upgrade libsoftokn3-x86 | Oct 2, 2017 | Sep 29, 2017 |
| Ubuntu | — | Upgrade thunderbirdUpgrade firefox | Oct 3, 2017 | Sep 29, 2017 |
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