Teamtek Universal FTP Server 1.0.50 allows remote attackers to cause a denial of service (daemon crash or hang) via (1) multiple STOR (aka PUT) commands, or an MKD command followed by (2) a '*' argument, (3) a '|' argument, (4) spaces, or (5) a long string.  NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.