In X.Org Server (aka xserver and xorg-server) before 1.19.4, an attacker authenticated to an X server with the X shared memory extension enabled can cause aborts of the X server or replace shared memory segments of other X clients in the same session.
{ "availability": "No subscription required", "ubuntu_priority": "low", "binaries": [ { "xvfb": "2:1.15.1-0ubuntu2.10", "xdmx": "2:1.15.1-0ubuntu2.10", "xserver-xorg-core-dbg": "2:1.15.1-0ubuntu2.10", "xserver-xorg-core-udeb-dbgsym": "2:1.15.1-0ubuntu2.10", "xdmx-tools-dbgsym": "2:1.15.1-0ubuntu2.10", "xserver-xorg-dev": "2:1.15.1-0ubuntu2.10", "xorg-server-source": "2:1.15.1-0ubuntu2.10", "xserver-xorg-core": "2:1.15.1-0ubuntu2.10", "xserver-common": "2:1.15.1-0ubuntu2.10", "xnest-dbgsym": "2:1.15.1-0ubuntu2.10", "xnest": "2:1.15.1-0ubuntu2.10", "xserver-xephyr": "2:1.15.1-0ubuntu2.10", "xserver-xorg-xmir": "2:1.15.1-0ubuntu2.10", "xdmx-tools": "2:1.15.1-0ubuntu2.10", "xserver-xorg-dev-dbgsym": "2:1.15.1-0ubuntu2.10", "xserver-xorg-core-dbgsym": "2:1.15.1-0ubuntu2.10", "xserver-xephyr-dbgsym": "2:1.15.1-0ubuntu2.10", "xdmx-dbgsym": "2:1.15.1-0ubuntu2.10", "xvfb-dbgsym": "2:1.15.1-0ubuntu2.10", "xserver-xorg-core-udeb": "2:1.15.1-0ubuntu2.10", "xserver-xorg-xmir-dbgsym": "2:1.15.1-0ubuntu2.10" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "low", "binaries": [ { "xserver-xorg-core-lts-xenial": "2:1.18.3-1ubuntu2.3~trusty3", "xserver-xorg-core-lts-xenial-dbg": "2:1.18.3-1ubuntu2.3~trusty3", "xserver-xorg-core-lts-xenial-dbgsym": "2:1.18.3-1ubuntu2.3~trusty3", "xorg-server-source-lts-xenial": "2:1.18.3-1ubuntu2.3~trusty3", "xserver-xorg-dev-lts-xenial": "2:1.18.3-1ubuntu2.3~trusty3", "xwayland-lts-xenial": "2:1.18.3-1ubuntu2.3~trusty3", "xwayland-lts-xenial-dbgsym": "2:1.18.3-1ubuntu2.3~trusty3", "xserver-xephyr-lts-xenial-dbgsym": "2:1.18.3-1ubuntu2.3~trusty3", "xserver-xephyr-lts-xenial": "2:1.18.3-1ubuntu2.3~trusty3" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "low", "binaries": [ { "xvfb": "2:1.18.4-0ubuntu0.6", "xserver-xorg-legacy": "2:1.18.4-0ubuntu0.6", "xdmx": "2:1.18.4-0ubuntu0.6", "xserver-xorg-core-dbg": "2:1.18.4-0ubuntu0.6", "xserver-xorg-core-udeb-dbgsym": "2:1.18.4-0ubuntu0.6", "xdmx-tools-dbgsym": "2:1.18.4-0ubuntu0.6", "xserver-xorg-dev": "2:1.18.4-0ubuntu0.6", "xnest-dbgsym": "2:1.18.4-0ubuntu0.6", "xserver-xorg-core": "2:1.18.4-0ubuntu0.6", "xserver-common": "2:1.18.4-0ubuntu0.6", "xwayland-dbgsym": "2:1.18.4-0ubuntu0.6", "xnest": "2:1.18.4-0ubuntu0.6", "xserver-xephyr": "2:1.18.4-0ubuntu0.6", "xserver-xorg-xmir": "2:1.18.4-0ubuntu0.6", "xdmx-tools": "2:1.18.4-0ubuntu0.6", "xmir-dbgsym": "2:1.18.4-0ubuntu0.6", "xwayland": "2:1.18.4-0ubuntu0.6", "xorg-server-source": "2:1.18.4-0ubuntu0.6", "xserver-xorg-core-dbgsym": "2:1.18.4-0ubuntu0.6", "xmir": "2:1.18.4-0ubuntu0.6", "xserver-xephyr-dbgsym": "2:1.18.4-0ubuntu0.6", "xdmx-dbgsym": "2:1.18.4-0ubuntu0.6", "xvfb-dbgsym": "2:1.18.4-0ubuntu0.6", "xserver-xorg-legacy-dbgsym": "2:1.18.4-0ubuntu0.6", "xserver-xorg-core-udeb": "2:1.18.4-0ubuntu0.6" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "low", "binaries": [ { "xserver-xorg-dev-hwe-16.04": "2:1.19.3-1ubuntu1~16.04.3", "xorg-server-source-hwe-16.04": "2:1.19.3-1ubuntu1~16.04.3", "xmir-hwe-16.04": "2:1.19.3-1ubuntu1~16.04.3", "xserver-xorg-core-hwe-16.04-dbg": "2:1.19.3-1ubuntu1~16.04.3", "xserver-xorg-legacy-hwe-16.04": "2:1.19.3-1ubuntu1~16.04.3", "xwayland-hwe-16.04": "2:1.19.3-1ubuntu1~16.04.3", "xserver-xephyr-hwe-16.04-dbgsym": "2:1.19.3-1ubuntu1~16.04.3", "xserver-xorg-core-hwe-16.04-dbgsym": "2:1.19.3-1ubuntu1~16.04.3", "xserver-xorg-core-hwe-16.04": "2:1.19.3-1ubuntu1~16.04.3", "xserver-xorg-legacy-hwe-16.04-dbgsym": "2:1.19.3-1ubuntu1~16.04.3", "xserver-xephyr-hwe-16.04": "2:1.19.3-1ubuntu1~16.04.3", "xmir-hwe-16.04-dbgsym": "2:1.19.3-1ubuntu1~16.04.3", "xwayland-hwe-16.04-dbgsym": "2:1.19.3-1ubuntu1~16.04.3" } ] }