Provide references for CVE-2011-4923.
Where can I find more information about CVE-2011-4923?
References are available at: http://www.openwall.com/lists/oss-security/2011/10/27/8, https://exchange.xforce.ibmcloud.com/vulnerabilities/71030, http://www.openwall.com/lists/oss-security/2012/01/04/15, http://ubuntu.com/usn/usn-1249-1, http://www.securityfocus.com/bid/50406, http://secunia.com/advisories/46615.