CVE-2019-3814

Name	CVE-2019-3814
Description	It was discovered that Dovecot before versions 2.2.36.1 and 2.3.4.1 incorrectly handled client certificates. A remote attacker in possession of a valid certificate with an empty username field could possibly use this issue to impersonate other users.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
References	DLA-1667-1, DSA-4385-1
NVD severity	medium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
dovecot (PTS)	jessie	1:2.2.13-12~deb8u4	vulnerable
	jessie (security)	1:2.2.13-12~deb8u6	fixed
	stretch (security), stretch	1:2.2.27-3+deb9u4	fixed
	bullseye, sid, buster	1:2.3.4.1-5	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin
dovecot	source	(unstable)	1:2.3.4.1-1	medium
dovecot	source	jessie	1:2.2.13-12~deb8u5	medium	DLA-1667-1
dovecot	source	stretch	1:2.2.27-3+deb9u3	medium	DSA-4385-1

https://www.openwall.com/lists/oss-security/2019/02/05/1