CVE-2013-6171: Dovecot

Medium severity, CVSS 5.8. EPSS: 1.5% chance of exploitation in the next 30 days.

checkpassword-reply in Dovecot before 2.2.7 performs setuid operations to a user who is authenticating, which allows local users to bypass authentication and access virtual email accounts by attaching to the process and using a restricted file descriptor to modify account information in the response to the dovecot-auth server.

Affected products

• Dovecot Dovecot: up to and including 2.2.6; version 2.0 only; version 2.0.0 only; version 2.0.1 only; version 2.0.2 only; version 2.0.3 only; …

Published 2013-12-09. Last modified 2026-06-17.