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Firefox normally asks for confirmation before asking the operating system to find an application to handle a scheme that the browser does not support. It did not ask before doing so for the Usenet-related schemes news: and snews:. Since most operating systems don't have a trusted newsreader installed by default, an unscrupulous program that the user downloaded could register itself as a handler. The website that served the application download could then launch that application at will. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, and Firefox ESR < 115.15.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade firefox-x11Upgrade firefox | Sep 23, 2024 | Sep 3, 2024 |
| Amazon Linux Ami 2 | — | Upgrade firefoxUpgrade firefox-debuginfo | Sep 19, 2024 | Sep 3, 2024 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Sep 5, 2024 | Sep 3, 2024 |
| Freebsd | — | Upgrade firefox | Sep 6, 2024 | Sep 5, 2024 |
| Gentoo Linux | — | Upgrade dev-lang/spidermonkey.Upgrade www-client/firefox-bin.Upgrade www-client/firefox.Upgrade mail-client/thunderbird.Upgrade mail-client/thunderbird-bin. | Dec 9, 2024 | Sep 3, 2024 |
| Mfsa2024 39 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 130.0 | Sep 5, 2024 | Sep 3, 2024 |
| Mfsa2024 40 | — | Upgrade to Mozilla Firefox ESR version 128.2Upgrade to the latest version of Mozilla Firefox | Sep 5, 2024 | Sep 3, 2024 |
| Mfsa2024 41 | — | Upgrade to Mozilla Firefox ESR version 115.15Upgrade to the latest version of Mozilla Firefox | Sep 5, 2024 | Sep 3, 2024 |
| Oracle_linux | — | Upgrade firefoxUpgrade firefox-x11 | Oct 16, 2024 | Sep 3, 2024 |
| Redhat_linux | — | Upgrade firefoxUpgrade firefox-debuginfoNo solution existsUpgrade firefox-x11Upgrade firefox-debugsource | Sep 18, 2024 | Sep 3, 2024 |
| Rocky_linux | — | Upgrade firefox-debugsourceUpgrade firefox-debuginfoUpgrade firefoxUpgrade firefox-x11 | Sep 17, 2024 | Sep 3, 2024 |
| Suse | — | Upgrade mozjs128Upgrade mozillafirefox-branding-upstreamUpgrade MozillaFirefoxUpgrade mozjs128-develUpgrade MozillaFirefox-translations-commonUpgrade MozillaFirefox-develUpgrade MozillaFirefox-translations-otherUpgrade libmozjs-128-0 | Dec 31, 2024 | Sep 3, 2024 |
| Ubuntu | — | Upgrade firefox | Sep 6, 2024 | Sep 3, 2024 |
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