Ruby Gem Fileutils prior to v0.7.1 contains a Command Injection vulnerability in user supplied url variable that is passed to the shell.
rubygems.org/gems/fileutils
www.vapidlabs.com/advisory.php?v=36
bugs.ruby-lang.org/issues/7958
github.com/ruby/fileutils
github.com/ruby/fileutils/commit/994c7aa1ba391689f844a069b9aee9e49813686c
github.com/rubysec/ruby-advisory-db/blob/master/gems/fileutils/CVE-2013-2516.yml
nvd.nist.gov/vuln/detail/CVE-2013-2516