NWFTPD.nlm before 5.03b in the FTP server in Novell NetWare allows remote authenticated users to cause a denial of service (abend) via a crafted ABOR command.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2002-2411
http://www.novell.com/support/viewContent.do?externalId=3238588&sliceId=1