Mozilla developers reported memory safety bugs present in Firefox 84 and Firefox ESR 78.6. 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 < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.
CVSS Details
- CVSS 3.1 Base Score: 8.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade librewolfUpgrade mozjs78Upgrade firefox-esrUpgrade firefoxUpgrade thunderbird | Jun 17, 2022 | Feb 26, 2021 |
| Amazon Linux Ami 2 | — | Upgrade thunderbirdUpgrade thunderbird-debuginfo | Feb 22, 2021 | Feb 22, 2021 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Feb 26, 2021 |
| Centos_linux | — | Upgrade firefox-debugsourceUpgrade thunderbird-debuginfoUpgrade thunderbird-debugsourceUpgrade firefox-debuginfoUpgrade thunderbirdUpgrade firefox | Jan 28, 2021 | Jan 27, 2021 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Jan 29, 2021 | Jan 29, 2021 |
| Gentoo Linux | — | Upgrade mail-client/thunderbird.Upgrade www-client/firefox-bin.Upgrade www-client/firefox.Upgrade mail-client/thunderbird-bin. | Feb 1, 2021 | Feb 1, 2021 |
| Mfsa2021 03 | — | Upgrade to Mozilla Firefox version 85.0 | Jan 27, 2021 | Jan 26, 2021 |
| Mfsa2021 04 | — | Upgrade to Mozilla Firefox ESR version 78.7 | Jan 27, 2021 | Jan 26, 2021 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 78.7 | Jan 27, 2021 | Jan 26, 2021 |
| Oracle Solaris | — | Upgrade web/data/firefox-bookmarks to version 78.8.0-11.4.31.0.1.88.4 on Solaris 11.4Upgrade library/libmozjs-78 to version 78.11.0-11.4.39.0.1.107.0 on Solaris 11.4Upgrade mail/thunderbird to version 78.8.0-11.4.31.0.1.88.4 on Solaris 11.4Upgrade web/browser/firefox to version 78.8.0-11.4.31.0.1.88.4 on Solaris 11.4 | Mar 17, 2021 | Feb 26, 2021 |
| Oracle_linux | — | Upgrade firefoxUpgrade thunderbird | Jan 28, 2021 | Jan 26, 2021 |
| Redhat_linux | — | Upgrade thunderbird-debugsourceUpgrade thunderbirdNo solution existsUpgrade firefoxUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoUpgrade firefox-debugsource | Jan 28, 2021 | Jan 27, 2021 |
| Suse | — | Upgrade mozillathunderbirdUpgrade mozillafirefoxUpgrade mozillafirefox-branding-upstreamUpgrade mozillafirefox-buildsymbolsUpgrade mozillafirefox-develUpgrade mozillathunderbird-translations-otherUpgrade mozillafirefox-translations-commonUpgrade mozillafirefox-translations-otherUpgrade mozillathunderbird-translations-common | Jan 30, 2021 | Jan 27, 2021 |
| Ubuntu | — | Upgrade thunderbirdUpgrade firefox | Feb 2, 2021 | Jan 27, 2021 |
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