CVE-2011-4318

NameCVE-2011-4318
DescriptionDovecot 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs649511

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
dovecot (PTS)bullseye1:2.3.13+dfsg1-2+deb11u1fixed
bullseye (security)1:2.3.13+dfsg1-2+deb11u2fixed
bookworm, bookworm (security)1:2.3.19.1+dfsg1-2.1+deb12u1fixed
sid, trixie1:2.3.21.1+dfsg1-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
dovecotsource(unstable)1:2.0.18-1unimportant649511

Notes

Additional hardening
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