Gnome Online Accounts (GOA) 3.6.x before 3.6.3 and 3.7.x before 3.7.91, does not properly validate SSL certificates when creating accounts for providers who use the libsoup library, which allows man-in-the-middle attackers to obtain sensitive information such as credentials by sniffing the network. NOTE: this issue exists because of an incomplete fix for CVE-2013-0240.
https://mail.gnome.org/archives/gnome-announce-list/2013-March/msg00020.html
https://mail.gnome.org/archives/gnome-announce-list/2013-March/msg00007.html
https://bugzilla.gnome.org/show_bug.cgi?id=695106
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