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.kb.cert.org/vuls/id/MAPG-7N9GN8 http://www.vuxml.org/freebsd/872ae5be-29c0-11de-bdeb-0030843d3802.html

The following package is affected: ziproxy CVE-2009-0804 Ziproxy 2.6.0, when transparent interception mode is enabled, uses the HTTP Host header to determine the remote endpoint, which allows remote attackers to bypass access controls for Flash, Java, Silverlight, and probably other technologies, and possibly communicate with restricted intranet sites, via a crafted web page that causes a client to send HTTP requests with a modified Host header.