Type Conversion Vulnerability in Thunderbird, Firefox ESR, and Firefox Versions < 95

Type Conversion Vulnerability in Thunderbird, Firefox ESR, and Firefox Versions < 95

CVE-2021-43537 · HIGH Severity

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

An incorrect type conversion of sizes from 64bit to 32bit integers allowed an attacker to corrupt memory leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

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