GLib networking, the network extensions for GLib, failed to verify certificates’ hostnames if the application didn’t specify the server identity.
Applications must provide a server identity or GLib will fail with G_TLS_CERTIFICATE_BAD_IDENTITY.
For Debian 8 jessie, these problems have been fixed in version 2.42.0-2+deb8u1.
We recommend that you upgrade your glib-networking packages.
Further information about Extended LTS security advisories can be found at: https://deb.freexian.com/extended-lts/