CVE-2020-7957
The IMAP and LMTP components in Dovecot 2.3.9 before 2.3.9.3 mishandle snippet generation when many characters must be read to compute the snippet and a trailing > character exists. This causes a denial of service in which the recipient cannot read all of their messages.
Date published : 2020-02-12
http://www.openwall.com/lists/oss-security/2020/02/12/2
https://dovecot.org/pipermail/dovecot-news/2020-February/000430.html