Provide references for CVE-2011-1904.
Where can I find more information about CVE-2011-1904?
References are available at: https://support.proofpoint.com/article.cgi?article_id=338413, http://www.kb.cert.org/vuls/id/790980, http://www.clearskies.net/documents/css-advisory-css1105-proofpoint.php.