A buffer overflow can occur when manipulating the SVG "animatedPathSegList" through script. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.7, Firefox ESR < 52.7, and Firefox < 59.
https://www.mozilla.org/security/advisories/mfsa2018-09/
https://www.mozilla.org/security/advisories/mfsa2018-07/
https://www.mozilla.org/security/advisories/mfsa2018-06/
https://www.debian.org/security/2018/dsa-4155
https://www.debian.org/security/2018/dsa-4139
https://usn.ubuntu.com/3596-1/
https://usn.ubuntu.com/3545-1/
https://security.gentoo.org/glsa/201811-13
https://security.gentoo.org/glsa/201810-01
https://lists.debian.org/debian-lts-announce/2018/03/msg00029.html
https://lists.debian.org/debian-lts-announce/2018/03/msg00010.html
https://bugzilla.mozilla.org/show_bug.cgi?id=1430557
https://access.redhat.com/errata/RHSA-2018:0648
https://access.redhat.com/errata/RHSA-2018:0647
https://access.redhat.com/errata/RHSA-2018:0527
https://access.redhat.com/errata/RHSA-2018:0526