Provide references for CVE-2017-12240.
Where can I find more information about CVE-2017-12240?
References are available at: https://quickview.cloudapps.cisco.com/quickview/bug/CSCuw77959, https://quickview.cloudapps.cisco.com/quickview/bug/CSCsm45390, http://www.securityfocus.com/bid/101034, https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-dhcp, http://www.securitytracker.com/id/1039445.