From ${URL} : Description A vulnerability has been reported in Dovecot, which can be exploited by malicious users to cause a DoS (Denial of Service). The vulnerability is caused due to an error within IMAP functionality when processing the "APPEND" parameters and can be exploited to cause a hang. The vulnerability is reported in version 2.2. Solution Update to version 2.2.2. Provided and/or discovered by Reported by the vendor. Original Advisory http://www.dovecot.org/list/dovecot-news/2013-May/000255.html @maintainer(s): after the bump, in case we need to stabilize the package, please say explicitly if it is ready for the stabilization or not.