Security flaw in Ubuntu login screen could let anyone access your files (OMG! Ubuntu!)

The OMG! Ubuntu! site reports that the "guest session" functionality enabled by default on Ubuntu desktops fails to actually confine the guest account. "If you’re running a fully up-to-date system you do not need to panic. Canonical has already pushed out a update that temporarily disables Ubuntu guest session logins (so if you noticed it was missing, that’s why)." See the bug report for details on this issue, which was reported in February.

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