CVE-2024-8383: firefox — Fix

Description

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.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness Type (CWE)

CWE-1188 CWE-1188

Affected Products

Vendor	Product	Versions
mozilla	firefox	< 130.0
mozilla	firefox_esr	< 115.15
mozilla	firefox_esr	128.0 — 128.2

References

Advisories & Patches

https://www.mozilla.org/security/advisories/mfsa2024-39/ https://www.mozilla.org/security/advisories/mfsa2024-40/ https://www.mozilla.org/security/advisories/mfsa2024-41/

Other References

https://bugzilla.mozilla.org/show_bug.cgi?id=1908496 https://lists.debian.org/debian-lts-announce/2024/09/msg00012.html https://lists.debian.org/debian-lts-announce/2024/09/msg00025.html

Frequently Asked Questions

What is CVE-2024-8383? +

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. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2024-8383? +

CVE-2024-8383 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-8383? +

CVE-2024-8383 affects products from mozilla, specifically: firefox, firefox_esr. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-8383? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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