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 advisories/code/issues, web search, more)
References	DLA-1667-1, DSA-4385-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
dovecot (PTS)	buster	1:2.3.4.1-5+deb10u6	fixed
	buster (security)	1:2.3.4.1-5+deb10u5	fixed
	bullseye	1:2.3.13+dfsg1-2	fixed
	bookworm, sid	1:2.3.19.1+dfsg1-2	fixed

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

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

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