The remote host is missing an update to the system as announced in the referenced advisory.

Update your system with the appropriate patches or software upgrades. http://cvsweb.netbsd.org/bsdweb.cgi/src/libexec/ftpd/ftpd.c#rev1.158 ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2004-009.txt.asc http://lists.netsys.com/pipermail/full-disclosure/2004-August/025418.html http://www.vuxml.org/freebsd/c4b025bb-f05d-11d8-9837-000c41e2cdad.html

The following packages are affected: tnftpd lukemftpd CVE-2004-0794 Multiple signal handler race conditions in lukemftpd (aka tnftpd before 20040810) allow remote authenticated attackers to cause a denial of service or execute arbitrary code.