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.
packetstormsecurity.com/files/155592/Mozilla-Firefox-Windows-64-Bit-Chain-Exploit.html
access.redhat.com/errata/RHSA-2019:0966
access.redhat.com/errata/RHSA-2019:1144
bugzilla.mozilla.org/show_bug.cgi?id=1537924
www.mozilla.org/security/advisories/mfsa2019-09/
www.mozilla.org/security/advisories/mfsa2019-10/
www.mozilla.org/security/advisories/mfsa2019-12/