When Responsive Design Mode was enabled, it used references to objects that were previously freed. We presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
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 |
|---|---|---|---|---|
| Alma_linux | — | Upgrade firefoxUpgrade thunderbird | May 4, 2022 | Jun 24, 2021 |
| Alpine Linux | — | Upgrade thunderbirdUpgrade firefoxUpgrade firefox-esrUpgrade librewolf | Aug 22, 2024 | Jun 24, 2021 |
| Amazon Linux Ami 2 | — | Upgrade thunderbird-debuginfoUpgrade thunderbird | May 26, 2021 | May 26, 2021 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jun 24, 2021 |
| Centos_linux | — | Upgrade firefox-debuginfoUpgrade firefox-debugsourceUpgrade thunderbird-debuginfoUpgrade thunderbird-debugsourceUpgrade firefoxUpgrade thunderbird | Jun 1, 2021 | Apr 26, 2021 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Apr 23, 2021 | Apr 23, 2021 |
| Gentoo Linux | — | Upgrade www-client/firefox.Upgrade mail-client/thunderbird.Upgrade mail-client/thunderbird-bin.Upgrade www-client/firefox-bin. | May 3, 2021 | Apr 30, 2021 |
| Mfsa2021 15 | — | Upgrade to Mozilla Firefox ESR version 78.10Upgrade to the latest version of Mozilla Firefox | Apr 20, 2021 | Apr 19, 2021 |
| Mfsa2021 16 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 88.0 | Apr 20, 2021 | Apr 19, 2021 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 78.10Upgrade to the latest version of Mozilla Thunderbird | Apr 20, 2021 | Apr 19, 2021 |
| Oracle Solaris | — | Upgrade mail/thunderbird to version 78.10.0-11.4.34.0.1.94.3 on Solaris 11.4Upgrade web/browser/firefox to version 78.10.0-11.4.34.0.1.94.3 on Solaris 11.4Upgrade web/data/firefox-bookmarks to version 78.10.0-11.4.34.0.1.94.3 on Solaris 11.4 | Jun 16, 2021 | Jun 16, 2021 |
| Oracle_linux | — | Upgrade thunderbirdUpgrade firefox | Apr 27, 2021 | Apr 19, 2021 |
| Redhat_linux | — | No solution existsUpgrade firefox-debugsourceUpgrade thunderbird-debuginfoUpgrade firefoxUpgrade firefox-debuginfoUpgrade thunderbird-debugsourceUpgrade thunderbird | Apr 27, 2021 | Apr 26, 2021 |
| Suse | — | Upgrade mozillafirefox-buildsymbolsUpgrade MozillaFirefoxUpgrade mozillafirefox-branding-upstreamUpgrade MozillaThunderbird-translations-commonUpgrade MozillaFirefox-develUpgrade MozillaThunderbird-translations-otherUpgrade MozillaFirefox-translations-otherUpgrade MozillaFirefox-translations-commonUpgrade MozillaThunderbird | Apr 27, 2021 | Apr 23, 2021 |
| Ubuntu | — | Upgrade thunderbirdUpgrade firefox | Apr 27, 2021 | Apr 27, 2021 |
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