A denial of service flaw was found in dovecot before 2.2.34. An attacker able to generate random SNI server names could exploit TLS SNI configuration lookups, leading to excessive memory usage and the process to restart.
https://www.debian.org/security/2018/dsa-4130
https://usn.ubuntu.com/3587-1/
https://bugzilla.redhat.com/show_bug.cgi?id=1532356
http://seclists.org/oss-sec/2018/q1/205
https://www.dovecot.org/list/dovecot-news/2018-February/000370.html
https://usn.ubuntu.com/3587-2/
https://lists.debian.org/debian-lts-announce/2018/03/msg00036.html
Source: Mitre, NVD
Published: 2018-03-02
Updated: 2024-11-21
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P
Severity: Medium
Base Score: 5.9
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.01207