Crafted message headers can cause a Thunderbird process to hang on receiving the message. This vulnerability affects Thunderbird ESR < 52.8 and Thunderbird < 52.8.
http://www.securitytracker.com/id/1040946
https://access.redhat.com/errata/RHSA-2018:1725
https://access.redhat.com/errata/RHSA-2018:1726
https://bugzilla.mozilla.org/show_bug.cgi?id=1411720
https://lists.debian.org/debian-lts-announce/2018/05/msg00013.html
https://security.gentoo.org/glsa/201811-13
https://usn.ubuntu.com/3660-1/
Source: MITRE
Published: 2018-06-11
Updated: 2019-03-13
Type: CWE-20
Base Score: 4.3
Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P
Impact Score: 2.9
Exploitability Score: 8.6
Severity: MEDIUM
Base Score: 4.3
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Impact Score: 1.4
Exploitability Score: 2.8
Severity: MEDIUM