.NET Core is affected by a certificate validation bypass. This is due to the way certificates are validated which allows for an attacker to bypass security checks.
www.securityfocus.com/bid/102380
www.securitytracker.com/id/1040152
github.com/dotnet/announcements/issues/51
github.com/dotnet/core/blob/master/release-notes/2.0/2.0.5.md
github.com/Microsoft/dotnet/blob/master/releases/UWP/net-native2.0/README.md#uwp-606-net-native-tools-202-january-9th-2018
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0786