converter.rb in the md2pdf gem 0.0.1 for Ruby allows context-dependent attackers to execute arbitrary commands via shell metacharacters in a filename.Referenceshttp://vapid.dhs.org/advisories/md2pdf-remote-exec.htmlhttp://osvdb.org/92290https://exchange.xforce.ibmcloud.com/vulnerabilities/83416http://www.securityfocus.com/bid/59061
