A use-after-free vulnerability can occur in the Fetch API when the worker or the associated window are freed when still in use, resulting in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.
CVSS Details
- CVSS 3.1 Base Score: 9.8
- CVSS 3.0 Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/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 thunderbird-debuginfoUpgrade firefoxUpgrade firefox-debuginfoUpgrade thunderbird | Oct 2, 2017 | Sep 29, 2017 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Sep 30, 2017 | Sep 29, 2017 |
| Freebsd | — | Upgrade linux-firefoxUpgrade firefox-esrUpgrade linux-thunderbirdUpgrade seamonkeyUpgrade linux-seamonkeyUpgrade firefoxUpgrade libxulUpgrade thunderbird | Sep 29, 2017 | Sep 29, 2017 |
| Gentoo Linux | — | Upgrade mail-client/thunderbird-bin.Upgrade mail-client/thunderbird.Upgrade www-client/firefox.Upgrade www-client/firefox-bin. | Feb 20, 2018 | Feb 20, 2018 |
| Mfsa2017 21 | — | Upgrade to Mozilla Firefox version 56.0 | Jul 12, 2018 | Jun 11, 2018 |
| Mfsa2017 22 | — | Upgrade to Mozilla Firefox ESR version 52.4 | Sep 29, 2017 | Sep 28, 2017 |
| Mozilla Thunderbird | — | Upgrade 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 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/browser/firefox 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 11.3 | Nov 30, 2017 | Nov 30, 2017 |
| Oracle_linux | — | Upgrade firefoxUpgrade thunderbird | Sep 29, 2017 | Sep 28, 2017 |
| Redhat_linux | — | Upgrade thunderbirdUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoUpgrade firefox | Oct 4, 2017 | Sep 29, 2017 |
| Suse | — | Upgrade MozillaFirefox-develUpgrade mozilla-nss-toolsUpgrade libsoftokn3Upgrade mozilla-nss-certs-32bitUpgrade mozilla-nssUpgrade libsoftokn3-hmac-32bitUpgrade mozilla-nss-develUpgrade mozilla-nss-sysinitUpgrade MozillaThunderbirdUpgrade MozillaThunderbird-translations-otherUpgrade libfreebl3-hmac-32bitUpgrade MozillaThunderbird-develUpgrade MozillaFirefox-translations-otherUpgrade libfreebl3-x86Upgrade mozilla-nss-certsUpgrade MozillaThunderbird-translations-commonUpgrade MozillaFirefox-translations-commonUpgrade MozillaFirefox-translationsUpgrade mozilla-nss-x86Upgrade mozilla-nss-sysinit-32bitUpgrade libsoftokn3-x86Upgrade libfreebl3-32bitUpgrade MozillaThunderbird-buildsymbolsUpgrade libsoftokn3-hmacUpgrade libsoftokn3-32bitUpgrade libfreebl3-hmacUpgrade MozillaFirefoxUpgrade mozilla-nss-32bitUpgrade libfreebl3 | Oct 2, 2017 | Sep 29, 2017 |
| Ubuntu | — | Upgrade firefoxUpgrade thunderbird | Oct 3, 2017 | Sep 29, 2017 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub