Gnome Online Accounts (GOA) 3.4.x, 3.6.x before 3.6.3, and 3.7.x before 3.7.5, does not properly validate SSL certificates when creating accounts such as Windows Live and Facebook accounts, which allows man-in-the-middle attackers to obtain sensitive information such as credentials by sniffing the network.
https://mail.gnome.org/archives/gnome-announce-list/2013-March/msg00007.html
https://bugzilla.redhat.com/show_bug.cgi?id=894352
https://bugzilla.gnome.org/show_bug.cgi?id=693214
http://ubuntu.com/usn/usn-1779-1
http://secunia.com/advisories/52791
http://secunia.com/advisories/51976
http://lists.opensuse.org/opensuse-updates/2013-02/msg00046.html