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.ruby-lang.org/en/news/2006/12/04/another-dos-vulnerability-in-cgi-library/ http://www.vuxml.org/freebsd/a8674c14-83d7-11db-88d5-0012f06707f0.html

The following packages are affected: ruby ruby+pthreads ruby+pthreads+oniguruma ruby+oniguruma ruby_static