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 firefox-debuginfoUpgrade firefoxUpgrade thunderbird | Oct 2, 2017 | Sep 29, 2017 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Sep 30, 2017 | Sep 29, 2017 |
| Freebsd | — | Upgrade linux-thunderbirdUpgrade firefox-esrUpgrade linux-firefoxUpgrade thunderbirdUpgrade libxulUpgrade firefoxUpgrade linux-seamonkeyUpgrade seamonkey | Sep 29, 2017 | Sep 29, 2017 |
| Gentoo Linux | — | Upgrade www-client/firefox-bin.Upgrade www-client/firefox.Upgrade mail-client/thunderbird.Upgrade mail-client/thunderbird-bin. | 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 Mozilla Thunderbird version 52.4Upgrade to the latest version of Mozilla Thunderbird | Oct 11, 2017 | Oct 9, 2017 |
| Oracle Solaris | — | Upgrade 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 11.3Upgrade 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 thunderbirdUpgrade firefox-debuginfoUpgrade thunderbird-debuginfoUpgrade firefox | Oct 4, 2017 | Sep 29, 2017 |
| Suse | — | Upgrade mozilla-nss-toolsUpgrade MozillaThunderbird-translations-commonUpgrade MozillaThunderbird-develUpgrade libsoftokn3Upgrade MozillaThunderbirdUpgrade mozilla-nssUpgrade libfreebl3-x86Upgrade mozilla-nss-sysinitUpgrade MozillaFirefox-develUpgrade mozilla-nss-certs-32bitUpgrade MozillaFirefox-translations-otherUpgrade libsoftokn3-hmac-32bitUpgrade mozilla-nss-develUpgrade mozilla-nss-certsUpgrade libfreebl3-hmac-32bitUpgrade MozillaThunderbird-translations-otherUpgrade libfreebl3-32bitUpgrade mozilla-nss-32bitUpgrade mozilla-nss-sysinit-32bitUpgrade libsoftokn3-hmacUpgrade libsoftokn3-32bitUpgrade MozillaThunderbird-buildsymbolsUpgrade MozillaFirefoxUpgrade libsoftokn3-x86Upgrade MozillaFirefox-translations-commonUpgrade mozilla-nss-x86Upgrade libfreebl3-hmacUpgrade libfreebl3Upgrade MozillaFirefox-translations | 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