A password disclosure flaw was found with Dovecot's configuration file. If a system had the "ssl_key_password" option defined, any local user could view the SSL key password. (CVE-2008-4870)
Note: This flaw did not allow the attacker to acquire the contents of the SSL key. The password has no value without the key file which arbitrary users should not have read access to.
To better protect even this value, however, the dovecot.conf file now supports the "!include_try" directive. The ssl_key_password option should be moved from dovecot.conf to a new file owned by, and only readable and writable by, root (ie 0600). This file should be referenced from dovecot.conf by setting the "!include_try [/path/to/password/file]" option.