CVE-2017-5443: Mozilla: Out-of-bounds write during BinHex decoding (MFSA 2017-11, MFSA 2017-12)

Severity: Critical

CVSS Score: 9.8

An out-of-bounds write vulnerability while decoding improperly formed BinHex format archives. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.