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://www.zerodayinitiative.com/advisories/ZDI-10-229/ http://www.vuxml.org/freebsd/533d20e7-f71f-11df-9ae1-000bcdf0a03b.html

The following package is affected: proftpd CVE-2010-4221 Multiple stack-based buffer overflows in the pr_netio_telnet_gets function in netio.c in ProFTPD before 1.3.3c allow remote attackers to execute arbitrary code via vectors involving a TELNET IAC escape character to a (1) FTP or (2) FTPS server.