It was discovered that the gnome-shell lock screen since version 3.15.91 did not properly restrict all contextual actions. An attacker with physical access to a locked workstation could invoke certain keyboard shortcuts, and potentially other actions.
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{ "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "3.18.5-0ubuntu0.3+esm1", "binary_name": "gnome-shell" }, { "binary_version": "3.18.5-0ubuntu0.3+esm1", "binary_name": "gnome-shell-common" }, { "binary_version": "3.18.5-0ubuntu0.3+esm1", "binary_name": "gnome-shell-dbg" }, { "binary_version": "3.18.5-0ubuntu0.3+esm1", "binary_name": "gnome-shell-dbgsym" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "3.28.3+git20190124-0ubuntu18.04.2", "binary_name": "gnome-shell" }, { "binary_version": "3.28.3+git20190124-0ubuntu18.04.2", "binary_name": "gnome-shell-common" }, { "binary_version": "3.28.3+git20190124-0ubuntu18.04.2", "binary_name": "gnome-shell-dbgsym" } ] }