The remote host is missing an update to the system as announced in the referenced advisory.
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.
Solution: Update your system with the appropriate patches or software upgrades.