CVE-2011-4318

Name	CVE-2011-4318
Description	Dovecot 2.0.x before 2.0.16, when ssl or starttls is enabled and hostname is used to define the proxy destination, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via a valid certificate for a different hostname.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	649511

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+deb10u7	fixed
	bullseye	1:2.3.13+dfsg1-2+deb11u1	fixed
	bookworm	1:2.3.19.1+dfsg1-2.1	fixed
	sid	1:2.3.21+dfsg1-3	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
dovecot	source	(unstable)	1:2.0.18-1	unimportant		649511

Additional hardening