When using Alt-Svc, ALPN did not properly validate certificates when the original server is redirecting to an insecure site. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird < 128.6.
The product does not validate, or incorrectly validates, a certificate.
Link | Tags |
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https://bugzilla.mozilla.org/show_bug.cgi?id=1929156 | issue tracking permissions required |
https://www.mozilla.org/security/advisories/mfsa2025-01/ | vendor advisory |
https://www.mozilla.org/security/advisories/mfsa2025-02/ | vendor advisory |
https://www.mozilla.org/security/advisories/mfsa2025-04/ | vendor advisory |
https://www.mozilla.org/security/advisories/mfsa2025-05/ | vendor advisory |