Mozilla developers reported memory safety bugs present in Firefox 80 and Firefox ESR 78.2. 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 < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.
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 firefoxUpgrade thunderbirdUpgrade firefox-esrUpgrade librewolf | Aug 22, 2024 | Oct 1, 2020 |
| Amazon Linux Ami 2 | — | Upgrade thunderbird-debuginfoUpgrade thunderbird | Dec 10, 2020 | Oct 1, 2020 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Oct 1, 2020 |
| Centos_linux | — | Upgrade firefox-debuginfoUpgrade firefoxUpgrade thunderbird-debuginfoUpgrade thunderbirdUpgrade firefox-debugsourceUpgrade thunderbird-debugsource | Sep 25, 2020 | Sep 24, 2020 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Sep 30, 2020 | Sep 30, 2020 |
| Gentoo Linux | — | Upgrade www-client/firefox.Upgrade www-client/firefox-bin.Upgrade mail-client/thunderbird-bin.Upgrade mail-client/thunderbird. | Oct 19, 2020 | Oct 1, 2020 |
| Mfsa2020 42 | — | Upgrade to Mozilla Firefox version 81.0 | Sep 23, 2020 | Sep 22, 2020 |
| Mfsa2020 43 | — | Upgrade to Mozilla Firefox ESR version 78.3 | Sep 23, 2020 | Sep 22, 2020 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 78.3 | Sep 25, 2020 | Sep 22, 2020 |
| Oracle Solaris | — | Upgrade web/browser/firefox to version 78.3.0-11.4.27.0.1.82.0 on Solaris 11.4Upgrade mail/thunderbird to version 78.3.0-11.4.27.0.1.82.0 on Solaris 11.4Upgrade web/data/firefox-bookmarks to version 78.3.0-11.4.27.0.1.82.0 on Solaris 11.4 | Jan 19, 2021 | Oct 1, 2020 |
| Oracle_linux | — | Upgrade firefoxUpgrade thunderbird | Sep 25, 2020 | Sep 22, 2020 |
| Redhat_linux | — | Upgrade thunderbird-debugsourceUpgrade firefoxUpgrade thunderbirdUpgrade firefox-debugsourceUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoNo solution exists | Sep 25, 2020 | Sep 24, 2020 |
| Suse | — | Upgrade mozillafirefox-buildsymbolsUpgrade mozillafirefoxUpgrade mozillafirefox-develUpgrade mozillafirefox-translations-otherUpgrade mozillathunderbird-translations-commonUpgrade mozillafirefox-branding-upstreamUpgrade mozillafirefox-translations-commonUpgrade mozillathunderbirdUpgrade mozilla-nspr-develUpgrade mozilla-nsprUpgrade mozillathunderbird-translations-otherUpgrade mozilla-nspr-32bit | Sep 29, 2020 | Sep 24, 2020 |
| Ubuntu | — | Upgrade firefox | Sep 29, 2020 | Sep 24, 2020 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub