Dovecot is an IMAP server for Linux, UNIX, and similar operating systems, primarily written with security in mind. A flaw was found in the way Dovecot handled SIGCHLD signals. If a large amount of IMAP or POP3 session disconnects caused the Dovecot master process to receive these signals rapidly, it could cause the master process to crash. A flaw was found in the way Dovecot processed multiple Ac ...