The proxy server in Kerio WinRoute Firewall before 6.4.1 does not properly enforce authentication for HTTPS pages, which has unknown impact and attack vectors. NOTE: it is not clear whether this issue crosses privilege boundaries.
https://exchange.xforce.ibmcloud.com/vulnerabilities/39020
http://www.vupen.com/english/advisories/2007/4212
http://www.securitytracker.com/id?1019095
http://www.securityfocus.com/bid/26851
http://www.kerio.com/kwf_history.html