A buffer overflow was found during UTF8 to Unicode string conversion within JavaScript with extremely large amounts of data. This vulnerability requires the use of a malicious or vulnerable legacy extension in order to occur. This vulnerability affects Thunderbird ESR < 52.8, Thunderbird < 52.8, and Firefox ESR < 52.8.
http://www.securityfocus.com/bid/104138
http://www.securitytracker.com/id/1040898
https://access.redhat.com/errata/RHSA-2018:1414
https://access.redhat.com/errata/RHSA-2018:1415
https://access.redhat.com/errata/RHSA-2018:1725
https://access.redhat.com/errata/RHSA-2018:1726
https://bugzilla.mozilla.org/show_bug.cgi?id=1443891
https://lists.debian.org/debian-lts-announce/2018/05/msg00007.html
https://lists.debian.org/debian-lts-announce/2018/05/msg00013.html
https://security.gentoo.org/glsa/201810-01
https://security.gentoo.org/glsa/201811-13
https://usn.ubuntu.com/3660-1/
https://www.debian.org/security/2018/dsa-4199
https://www.debian.org/security/2018/dsa-4209
Source: MITRE
Published: 2018-06-11
Updated: 2019-03-11
Type: CWE-119
Base Score: 6.8
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 8.6
Severity: MEDIUM
Base Score: 8.1
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 2.2
Severity: HIGH