https://tools.cisco.com/bugsearch/bug/CSCur44409
https://tools.cisco.com/bugsearch/bug/CSCur89626
https://tools.cisco.com/bugsearch/bug/CSCur89624
http://yuilibrary.com/support/20131111-vulnerability/
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-6780
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-6780