Provide references for CVE-2017-6679.
Where can I find more information about CVE-2017-6679?
References are available at: https://www.info-sec.ca/advisories/Cisco-Umbrella.html, https://support.umbrella.com/hc/en-us/articles/115004752143-Virtual-Appliance-Vulnerability-due-to-always-on-SSH-Tunnel-RESOLVED-2017-09-15, http://www.securityfocus.com/bid/101567, https://support.umbrella.com/hc/en-us/articles/115004154423, https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-umbrella-tunnel-gJw5thgE.