In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition. This vulnerability affects Firefox < 82.0.3, Firefox ESR < 78.4.1, and Thunderbird < 78.4.2.
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 mozjs78Upgrade thunderbirdUpgrade firefoxUpgrade firefox-esrUpgrade librewolf | Jan 4, 2021 | Dec 9, 2020 |
| Amazon Linux Ami 2 | — | Upgrade thunderbirdUpgrade thunderbird-debuginfo | Dec 10, 2020 | Dec 9, 2020 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Dec 9, 2020 |
| Centos_linux | — | Upgrade thunderbirdUpgrade firefoxUpgrade thunderbird-debugsourceUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoUpgrade firefox-debugsource | Nov 13, 2020 | Nov 12, 2020 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Nov 12, 2020 | Nov 12, 2020 |
| Gentoo Linux | — | Upgrade www-client/firefox-bin.Upgrade www-client/firefox. | Nov 12, 2020 | Nov 11, 2020 |
| Mfsa2020 49 | — | Upgrade to Mozilla Firefox ESR version 78.4.1Upgrade to Mozilla Firefox version 82.0.3 | Nov 10, 2020 | Nov 9, 2020 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 78.4.2 | Nov 10, 2020 | Nov 9, 2020 |
| Oracle Solaris | — | Upgrade library/libmozjs-78 to version 78.11.0-11.4.39.0.1.107.0 on Solaris 11.4Upgrade web/browser/firefox to version 78.5.0-11.4.28.0.1.82.2 on Solaris 11.4Upgrade 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 11.4 | Jan 19, 2021 | Dec 9, 2020 |
| Oracle_linux | — | Upgrade firefoxUpgrade thunderbird | Nov 14, 2020 | Nov 9, 2020 |
| Redhat_linux | — | Upgrade firefox-debugsourceUpgrade firefox-debuginfoUpgrade firefoxNo solution existsUpgrade thunderbird-debuginfoUpgrade thunderbird-debugsourceUpgrade thunderbird | Nov 13, 2020 | Nov 12, 2020 |
| Suse | — | Upgrade MozillaFirefox-translations-otherUpgrade MozillaFirefox-translations-commonUpgrade MozillaThunderbirdUpgrade MozillaThunderbird-translations-otherUpgrade MozillaFirefox-develUpgrade MozillaThunderbird-translations-commonUpgrade MozillaFirefoxUpgrade mozillafirefox-branding-upstreamUpgrade mozillafirefox-buildsymbols | Nov 12, 2020 | Nov 10, 2020 |
| Ubuntu | — | Upgrade firefoxUpgrade thunderbird | Nov 11, 2020 | Nov 10, 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