n/dovecot-2.3.4.1-i586-1.txz
This update addresses security issues:
CVE-2019-3814: If imap/pop3/managesieve/submission client has trusted
certificate with missing username field (ssl_cert_username_field), under
some configurations Dovecot mistakenly trusts the username provided via
authentication instead of failing.
ssl_cert_username_field setting was ignored with external SMTP AUTH,
because none of the MTAs (Postfix, Exim) currently send the cert_username
field. This may have allowed users with trusted certificate to specify any
username in the authentication. This bug didn't affect Dovecot's
Submission service.
For more information, see:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3814
(* Security fix *)
Giuseppe Di Terlizzi