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 librewolfUpgrade firefox-esrUpgrade thunderbirdUpgrade firefox | Jan 4, 2021 | Oct 22, 2020 |
| Amazon Linux Ami 2 | — | Upgrade thunderbirdUpgrade thunderbird-debuginfo | 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 thunderbirdUpgrade firefox-debugsourceUpgrade firefox-debuginfo | Oct 23, 2020 | Oct 22, 2020 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Oct 23, 2020 | Oct 23, 2020 |
| Gentoo Linux | — | Upgrade www-client/firefox.Upgrade www-client/firefox-bin.Upgrade mail-client/thunderbird.Upgrade mail-client/thunderbird-bin. | Oct 28, 2020 | Oct 22, 2020 |
| Mfsa2020 45 | — | Upgrade to Mozilla Firefox version 82.0Upgrade to the latest version of Mozilla Firefox | Oct 21, 2020 | Oct 20, 2020 |
| Mfsa2020 46 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 78.4 | Oct 21, 2020 | Oct 20, 2020 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 78.4 | Oct 22, 2020 | Oct 21, 2020 |
| Oracle Solaris | — | Upgrade web/data/firefox-bookmarks 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/browser/firefox 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 | — | Upgrade thunderbird-debuginfoUpgrade thunderbird-debugsourceUpgrade firefox-debuginfoNo solution existsUpgrade thunderbirdUpgrade firefoxUpgrade firefox-debugsource | Oct 23, 2020 | Oct 22, 2020 |
| Suse | — | Upgrade mozillafirefox-branding-upstreamUpgrade mozillafirefox-buildsymbolsUpgrade MozillaThunderbird-translations-commonUpgrade MozillaFirefox-develUpgrade mozilla-nsprUpgrade mozilla-nspr-develUpgrade MozillaThunderbird-translations-otherUpgrade MozillaFirefox-translations-otherUpgrade MozillaThunderbirdUpgrade MozillaFirefoxUpgrade mozilla-nspr-32bitUpgrade MozillaFirefox-translations-common | Feb 7, 2021 | Oct 22, 2020 |
| Ubuntu | — | Upgrade thunderbirdUpgrade firefox | Mar 22, 2023 | Oct 22, 2020 |
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