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 thunderbirdUpgrade firefoxUpgrade librewolfUpgrade firefox-esr | 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 firefox-debugsourceUpgrade thunderbird-debugsourceUpgrade firefox-debuginfoUpgrade firefoxUpgrade thunderbirdUpgrade thunderbird-debuginfo | Oct 23, 2020 | Oct 22, 2020 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Oct 23, 2020 | Oct 23, 2020 |
| Gentoo Linux | — | Upgrade www-client/firefox-bin.Upgrade mail-client/thunderbird.Upgrade www-client/firefox.Upgrade mail-client/thunderbird-bin. | Oct 28, 2020 | Oct 22, 2020 |
| Mfsa2020 45 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 82.0 | Oct 21, 2020 | Oct 20, 2020 |
| Mfsa2020 46 | — | Upgrade to Mozilla Firefox ESR version 78.4Upgrade to the latest version of Mozilla Firefox | Oct 21, 2020 | Oct 20, 2020 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 78.4Upgrade to the latest version of Mozilla Thunderbird | Oct 22, 2020 | Oct 21, 2020 |
| Oracle Solaris | — | Upgrade web/browser/firefox to version 78.5.0-11.4.28.0.1.82.2 on Solaris 11.4Upgrade mail/thunderbird 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 firefoxUpgrade thunderbird | Nov 23, 2022 | Oct 20, 2020 |
| Redhat_linux | — | No solution existsUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoUpgrade firefoxUpgrade thunderbird-debugsourceUpgrade thunderbirdUpgrade firefox-debugsource | Oct 23, 2020 | Oct 22, 2020 |
| Suse | — | Upgrade mozilla-nspr-32bitUpgrade mozilla-nsprUpgrade MozillaThunderbirdUpgrade MozillaThunderbird-translations-otherUpgrade MozillaFirefox-translations-otherUpgrade MozillaFirefox-develUpgrade MozillaFirefoxUpgrade mozilla-nspr-develUpgrade MozillaFirefox-translations-commonUpgrade mozillafirefox-buildsymbolsUpgrade mozillafirefox-branding-upstreamUpgrade MozillaThunderbird-translations-common | Feb 7, 2021 | Oct 22, 2020 |
| Ubuntu | — | Upgrade thunderbirdUpgrade firefox | Mar 22, 2023 | Oct 22, 2020 |
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