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://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-core/5237 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=315064 http://www.vuxml.org/freebsd/594eb447-e398-11d9-a8bd-000cf18bbe54.html

The following packages are affected: ruby ruby_static