NWFTPD.nlm before 5.01w in the FTP server in Novell NetWare allows remote attackers to cause a denial of service (abend) via an anonymous STOU command.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2001-1564
http://www.novell.com/support/viewContent.do?externalId=3238588&sliceId=1