Mozilla developers and community members reported memory safety bugs present in Firefox 63. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 64. Reference: https://bugzilla.mozilla.org/buglist.cgi?bug_id=1456947%2C1475669%2C1504816%2C1502886%2C1500064%2C1500310%2C1500696%2C1499198%2C1434490%2C1481745%2C1458129
External References: https://www.mozilla.org/en-US/security/advisories/mfsa2018-29/#CVE-2018-12406
Statement: This flaw did not affect the Firefox 60 ESR stream.