Colin Phipps discovered several problems in mime-support, that contains
support programs for the MIME control files 'mime.types' and 'mailcap'.
When a temporary file is to be used it is created insecurely, allowing
an attacker to overwrite arbitrary under the user id of the person
executing run-mailcap, most probably root. Additionally the program did
not properly escape shell escape characters when executing a command.
This is unlikely to be exploitable, though.
