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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.
Reserved 2024-09-03 | Published 2024-09-03 | Updated 2024-10-30 | Assigner mozillaFirefox did not ask before openings news: links in an external application
D7
bugzilla.mozilla.org/show_bug.cgi?id=1908496
www.mozilla.org/security/advisories/mfsa2024-39/
www.mozilla.org/security/advisories/mfsa2024-40/
www.mozilla.org/security/advisories/mfsa2024-41/
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