Provide references for CVE-2011-3991.
Where can I find more information about CVE-2011-3991?
References are available at: https://exchange.xforce.ibmcloud.com/vulnerabilities/71020, http://sourceforge.jp/projects/ffftp/wiki/Security, http://secunia.com/advisories/46649, http://jvn.jp/en/jp/JVN62336482/index.html, http://jvndb.jvn.jp/ja/contents/2011/JVNDB-2011-000091.html, http://www.securityfocus.com/bid/50412.