Provide references for CVE-2013-6391.
Where can I find more information about CVE-2013-6391?
References are available at: http://www.ubuntu.com/usn/USN-2061-1, http://www.securityfocus.com/bid/64253, http://www.openwall.com/lists/oss-security/2013/12/11/7, http://secunia.com/advisories/56154, http://secunia.com/advisories/56079, http://rhn.redhat.com/errata/RHSA-2014-0089.html, https://bugs.launchpad.net/keystone/+bug/1242597, https://exchange.xforce.ibmcloud.com/vulnerabilities/89657.