The WebChannel API, which is used to transport various information across processes, did not check the sending principal but rather accepted the principal being sent. This could have led to privilege escalation attacks. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade firefoxUpgrade firefox-x11Upgrade thunderbird | Jan 13, 2025 | Jan 7, 2025 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Jan 10, 2025 | Jan 7, 2025 |
| Freebsd | — | Upgrade librewolfUpgrade firefox-esrUpgrade firefoxUpgrade thunderbird | Apr 6, 2025 | Apr 4, 2025 |
| Gentoo Linux | — | Upgrade mail-client/thunderbird-bin.Upgrade www-client/firefox-bin.Upgrade www-client/firefox.Upgrade dev-lang/spidermonkey.Upgrade mail-client/thunderbird. | Jan 24, 2025 | Jan 7, 2025 |
| Mfsa2025 01 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 134.0 | Jan 8, 2025 | Jan 7, 2025 |
| Mfsa2025 02 | — | Upgrade to Mozilla Firefox ESR version 128.6Upgrade to the latest version of Mozilla Firefox | Jan 8, 2025 | Jan 7, 2025 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 128.6Upgrade to the latest version of Mozilla Thunderbird | Jan 10, 2025 | Jan 7, 2025 |
| Oracle_linux | — | Upgrade firefoxUpgrade firefox-x11 | Jan 10, 2025 | Jan 7, 2025 |
| Redhat_linux | — | Upgrade firefox-debuginfoNo solution existsUpgrade firefox-x11Upgrade thunderbirdUpgrade firefoxUpgrade thunderbird-debugsourceUpgrade thunderbird-debuginfoUpgrade firefox-debugsource | Jan 10, 2025 | Jan 7, 2025 |
| Rocky_linux | — | Upgrade firefox-debugsourceUpgrade firefoxUpgrade firefox-debuginfo | Jan 13, 2025 | Jan 7, 2025 |
| Suse | — | Upgrade mozjs128-develUpgrade MozillaThunderbird-translations-otherUpgrade MozillaFirefox-translations-otherUpgrade libmozjs-128-0Upgrade MozillaThunderbirdUpgrade mozillafirefox-branding-upstreamUpgrade mozjs128Upgrade MozillaFirefox-translations-commonUpgrade MozillaFirefoxUpgrade MozillaThunderbird-translations-commonUpgrade MozillaFirefox-devel | Jan 10, 2025 | Jan 7, 2025 |
| Ubuntu | — | Upgrade thunderbirdUpgrade firefox | Jan 10, 2025 | Jan 7, 2025 |
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