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 | alpine-linux-upgrade-firefox-esralpine-linux-upgrade-firefoxalpine-linux-upgrade-thunderbirdalpine-linux-upgrade-librewolf | Jan 4, 2021 | Oct 22, 2020 | |
| Amazon Linux Ami 2 | amazon-linux-ami-2-upgrade-thunderbirdamazon-linux-ami-2-upgrade-thunderbird-debuginfo | Dec 10, 2020 | Oct 22, 2020 | |
| Arch Linux | arch-linux-upgrade-latest | Jul 11, 2025 | Oct 22, 2020 | |
| Centos_linux | — | centos-upgrade-firefoxcentos-upgrade-firefox-debuginfocentos-upgrade-firefox-debugsourcecentos-upgrade-thunderbirdcentos-upgrade-thunderbird-debuginfocentos-upgrade-thunderbird-debugsource | Oct 23, 2020 | Oct 22, 2020 |
| Debian | debian-upgrade-firefox-esrdebian-upgrade-thunderbird | Oct 23, 2020 | Oct 23, 2020 | |
| Gentoo Linux | gentoo-linux-upgrade-mail-client-thunderbirdgentoo-linux-upgrade-mail-client-thunderbird-bingentoo-linux-upgrade-www-client-firefoxgentoo-linux-upgrade-www-client-firefox-bin | Oct 28, 2020 | Oct 22, 2020 | |
| Mfsa2020 45 | mozilla-firefox-upgrade-82_0 | Oct 21, 2020 | Oct 20, 2020 | |
| Mfsa2020 46 | mozilla-firefox-esr-upgrade-78_4 | Oct 21, 2020 | Oct 20, 2020 | |
| Mozilla Thunderbird | mozilla-thunderbird-upgrade-78_4 | Oct 22, 2020 | Oct 21, 2020 | |
| Oracle Solaris | oracle-solaris-11-4-upgrade-mail-thunderbird-78-5-0-11-4-28-0-1-82-2oracle-solaris-11-4-upgrade-web-browser-firefox-78-5-0-11-4-28-0-1-82-2oracle-solaris-11-4-upgrade-web-data-firefox-bookmarks-78-5-0-11-4-28-0-1-82-2 | Jan 19, 2021 | Oct 22, 2020 | |
| Oracle_linux | — | oracle-linux-upgrade-firefoxoracle-linux-upgrade-thunderbird | Nov 23, 2022 | Oct 20, 2020 |
| Redhat_linux | no-fix-redhat-rpm-packageredhat-upgrade-firefoxredhat-upgrade-firefox-debuginforedhat-upgrade-firefox-debugsourceredhat-upgrade-thunderbirdredhat-upgrade-thunderbird-debuginforedhat-upgrade-thunderbird-debugsource | Oct 23, 2020 | Oct 22, 2020 | |
| Suse | — | suse-upgrade-mozilla-nsprsuse-upgrade-mozilla-nspr-32bitsuse-upgrade-mozilla-nspr-develsuse-upgrade-mozillafirefoxsuse-upgrade-mozillafirefox-branding-upstreamsuse-upgrade-mozillafirefox-buildsymbolssuse-upgrade-mozillafirefox-develsuse-upgrade-mozillafirefox-translations-commonsuse-upgrade-mozillafirefox-translations-othersuse-upgrade-mozillathunderbirdsuse-upgrade-mozillathunderbird-translations-commonsuse-upgrade-mozillathunderbird-translations-other | Feb 7, 2021 | Oct 22, 2020 |
| Ubuntu | ubuntu-upgrade-firefoxubuntu-upgrade-thunderbird | Mar 22, 2023 | Oct 22, 2020 |
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