CVE-2011-4318: Dovecot

Medium severity, CVSS 5.8. EPSS: 1.3% chance of exploitation in the next 30 days.

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.

Affected products

• Dovecot Dovecot: version 2.0.0 only; version 2.0.1 only; version 2.0.2 only; version 2.0.3 only; version 2.0.4 only; version 2.0.5 only; …

Published 2013-03-07. Last modified 2026-06-16.