Incorrect alias information in IonMonkey JIT compiler for Array.prototype.slice method may lead to missing bounds check and a buffer overflow. This vulnerability affects Firefox < 66.0.1, Firefox ESR < 60.6.1, and Thunderbird < 60.6.1.
https://www.mozilla.org/security/advisories/mfsa2019-12/
https://www.mozilla.org/security/advisories/mfsa2019-10/
https://www.mozilla.org/security/advisories/mfsa2019-09/
https://bugzilla.mozilla.org/show_bug.cgi?id=1537924
https://access.redhat.com/errata/RHSA-2019:1144
https://access.redhat.com/errata/RHSA-2019:0966
http://packetstormsecurity.com/files/155592/Mozilla-Firefox-Windows-64-Bit-Chain-Exploit.html