lib/string_utf_support.rb in the Arabic Prawn 0.0.1 gem for Ruby allows remote attackers to execute arbitrary commands via shell metacharacters in the (1) downloaded_file or (2) url variable.

References

• https://nvd.nist.gov/vuln/detail/CVE-2014-2322
• http://www.openwall.com/lists/oss-security/2014/03/10/8
• http://www.openwall.com/lists/oss-security/2014/03/12/6
• https://web.archive.org/web/20160306235714/http://www.vapid.dhs.org/advisories/arabic-ruby-gem.html