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CVE-2021-29946

CVE-2021-29946

EPSS 1.2%
Ports that were written as an integer overflow above the bounds of a 16-bit integer could have bypassed port blocking restrictions when used in the Alt-Svc header. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
Affected products
Mozilla · FirefoxMozilla · Firefox ESRMozilla · Thunderbird

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References
https://bugzilla.mozilla.org/show_bug.cgi?id=1698503https://www.mozilla.org/security/advisories/mfsa2021-14/https://www.mozilla.org/security/advisories/mfsa2021-15/https://www.mozilla.org/security/advisories/mfsa2021-16/