Mozilla developers reported memory safety bugs present in Firefox 83 and Firefox ESR 78.5. 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 < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.
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 thunderbirdUpgrade firefoxUpgrade mozjs78Upgrade librewolfUpgrade firefox-esr | Jan 19, 2021 | Jan 7, 2021 |
| Amazon Linux Ami 2 | — | Upgrade thunderbird-debuginfoUpgrade thunderbird | Jan 8, 2021 | Jan 8, 2021 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jan 7, 2021 |
| Centos_linux | — | Upgrade thunderbird-debugsourceUpgrade firefoxUpgrade thunderbirdUpgrade firefox-debugsourceUpgrade firefox-debuginfoUpgrade thunderbird-debuginfo | Dec 21, 2020 | Dec 16, 2020 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Dec 18, 2020 | Dec 18, 2020 |
| Gentoo Linux | — | Upgrade www-client/firefox.Upgrade mail-client/thunderbird-bin.Upgrade www-client/firefox-bin.Upgrade mail-client/thunderbird. | Dec 29, 2020 | Dec 23, 2020 |
| Mfsa2020 54 | — | Upgrade to Mozilla Firefox version 84.0 | Dec 16, 2020 | Dec 15, 2020 |
| Mfsa2020 55 | — | Upgrade to Mozilla Firefox ESR version 78.6 | Dec 16, 2020 | Dec 15, 2020 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 78.6 | Dec 16, 2020 | Dec 15, 2020 |
| Oracle Solaris | — | Upgrade mail/thunderbird to version 78.6.0-11.4.30.0.1.88.0 on Solaris 11.4Upgrade library/libmozjs-78 to version 78.11.0-11.4.39.0.1.107.0 on Solaris 11.4 | Feb 17, 2021 | Jan 7, 2021 |
| Oracle_linux | — | Upgrade thunderbirdUpgrade firefox | Dec 17, 2020 | Dec 15, 2020 |
| Redhat_linux | — | Upgrade thunderbird-debugsourceUpgrade firefox-debuginfoUpgrade firefox-debugsourceUpgrade thunderbird-debuginfoNo solution existsUpgrade thunderbirdUpgrade firefox | Dec 21, 2020 | Dec 16, 2020 |
| Suse | — | Upgrade mozillafirefox-buildsymbolsUpgrade mozillathunderbird-translations-commonUpgrade mozillafirefoxUpgrade mozillafirefox-branding-upstreamUpgrade mozillathunderbird-translations-otherUpgrade mozillafirefox-translations-commonUpgrade mozillafirefox-develUpgrade mozillafirefox-translations-otherUpgrade mozillathunderbird | Dec 22, 2020 | Dec 15, 2020 |
| Ubuntu | — | Upgrade firefoxUpgrade thunderbird | Dec 16, 2020 | Dec 15, 2020 |
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