Arbitrary command execution via IMAP buffer overflow in authenticate command.

BID:130 | URL:http://www.securityfocus.com/bid/130 | CERT:CA-98.09.imapd | SUN:00177 | URL:http://sunsolve.sun.com/pub-cgi/retrieve.pl?doctype=coll&doc=secbull/177 | XF:imap-authenticate-bo