Mozilla developers and community members reported memory safety bugs present in Firefox 81 and Firefox ESR 78.3. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.4, Firefox < 82, and Thunderbird < 78.4.
CVSS Details
- CVSS 3.1 Base Score: 9.8
- CVSS 3.1 Vector: (CVSS:3.1/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-esrUpgrade librewolfUpgrade firefoxUpgrade thunderbird | Jan 4, 2021 | Oct 22, 2020 |
| Amazon Linux Ami 2 | — | Upgrade thunderbird-debuginfoUpgrade thunderbird | Dec 10, 2020 | Oct 22, 2020 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Oct 22, 2020 |
| Centos_linux | — | Upgrade thunderbird-debugsourceUpgrade thunderbird-debuginfoUpgrade firefoxUpgrade firefox-debuginfoUpgrade thunderbirdUpgrade firefox-debugsource | Oct 23, 2020 | Oct 22, 2020 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Oct 23, 2020 | Oct 23, 2020 |
| Gentoo Linux | — | Upgrade mail-client/thunderbird-bin.Upgrade mail-client/thunderbird.Upgrade www-client/firefox.Upgrade www-client/firefox-bin. | Oct 28, 2020 | Oct 22, 2020 |
| Mfsa2020 45 | — | Upgrade to Mozilla Firefox version 82.0 | Oct 21, 2020 | Oct 20, 2020 |
| Mfsa2020 46 | — | Upgrade to Mozilla Firefox ESR version 78.4 | Oct 21, 2020 | Oct 20, 2020 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 78.4 | Oct 22, 2020 | Oct 21, 2020 |
| Oracle Solaris | — | Upgrade mail/thunderbird to version 78.5.0-11.4.28.0.1.82.2 on Solaris 11.4Upgrade web/browser/firefox to version 78.5.0-11.4.28.0.1.82.2 on Solaris 11.4Upgrade web/data/firefox-bookmarks to version 78.5.0-11.4.28.0.1.82.2 on Solaris 11.4 | Jan 19, 2021 | Oct 22, 2020 |
| Oracle_linux | — | Upgrade thunderbirdUpgrade firefox | Nov 23, 2022 | Oct 20, 2020 |
| Redhat_linux | — | Upgrade firefoxUpgrade thunderbird-debuginfoUpgrade firefox-debugsourceUpgrade thunderbird-debugsourceNo solution existsUpgrade thunderbirdUpgrade firefox-debuginfo | Oct 23, 2020 | Oct 22, 2020 |
| Suse | — | Upgrade mozilla-nspr-develUpgrade mozillafirefox-translations-commonUpgrade mozilla-nsprUpgrade mozillathunderbird-translations-commonUpgrade mozilla-nspr-32bitUpgrade mozillathunderbirdUpgrade mozillafirefox-branding-upstreamUpgrade mozillafirefox-buildsymbolsUpgrade mozillathunderbird-translations-otherUpgrade mozillafirefox-translations-otherUpgrade mozillafirefox-develUpgrade mozillafirefox | Feb 7, 2021 | Oct 22, 2020 |
| Ubuntu | — | Upgrade firefoxUpgrade thunderbird | Mar 22, 2023 | Oct 22, 2020 |
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