[SECURITY] Fedora 27 Update: libXfont-1.5.2-5.fc27

X.Org X11 libXfont runtime library...

Ubuntu 14.04 LTS / 16.04 LTS : X.Org X server vulnerabilities (USN-3453-1)

The remote Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3453-1 advisory. Michal Srb discovered that the X.Org X server incorrectly handled shared memory segments. An attacker able to connect to an X server, either...

USN-3453-1: X.Org X server vulnerabilities

Michal Srb discovered that the X.Org X server incorrectly handled shared memory segments. An attacker able to connect to an X server, either locally or remotely, could use this issue to crash the server, or possibly replace shared memory segments of other X clients in the same session...

USN-3453-1 xorg-server, xorg-server-hwe-16.04, xorg-server-lts-xenial vulnerabilities

Michal Srb discovered that the X.Org X server incorrectly handled shared memory segments. An attacker able to connect to an X server, either locally or remotely, could use this issue to crash the server, or possibly replace shared memory segments of other X clients in the same session...

CVE-2017-13721

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...

CVE-2017-13723

In X.Org Server aka xserver and xorg-server before 1.19.4, a local attacker authenticated to the X server could overflow a global buffer, causing crashes of the X server or potentially other problems by injecting large or malformed XKB related atoms and accessing them via xkbcomp...

CVE-2017-13721

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...

CVE-2017-13723

In X.Org Server aka xserver and xorg-server before 1.19.4, a local attacker authenticated to the X server could overflow a global buffer, causing crashes of the X server or potentially other problems by injecting large or malformed XKB related atoms and accessing them via xkbcomp...

CVE-2017-13721

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...

CVE-2017-13723

In X.Org Server aka xserver and xorg-server before 1.19.4, a local attacker authenticated to the X server could overflow a global buffer, causing crashes of the X server or potentially other problems by injecting large or malformed XKB related atoms and accessing them via xkbcomp...

ALPINE-CVE-2017-13723

In X.Org Server aka xserver and xorg-server before 1.19.4, a local attacker authenticated to the X server could overflow a global buffer, causing crashes of the X server or potentially other problems by injecting large or malformed XKB related atoms and accessing them via xkbcomp...

Design/Logic Flaw

In X.Org Server aka xserver and xorg-server before 1.19.4, a local attacker authenticated to the X server could overflow a global buffer, causing crashes of the X server or potentially other problems by injecting large or malformed XKB related atoms and accessing them via xkbcomp...

Session fixation

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...

FreeBSD : xorg-server -- multiple vulnabilities (4f8ffb9c-f388-4fbd-b90f-b3131559d888)

Alan Coopersmith reports : X.Org thanks Michal Srb of SuSE for finding these issues and bringing them to our attention, Julien Cristau of Debian for getting the fixes integrated, and Adam Jackson of Red Hat for publishing the release. %NASLMINLEVEL 70300 C Tenable Network Security, Inc. The...

CVE-2017-13721

CVE-2017-13721 affects X.Org Server (xserver/xorg-server) prior to 1.19.4. The issue arises in ProcShmCreateSegment: a shmseg resource id can belong to a non-existing client, causing X server aborts with FatalError or overwriting another client’s segment. This can enable a local attacker to crash...

CVE-2017-13723

CVE-2017-13723 affects X.Org Server (xorg-server) prior to 1.19.4. A local attacker authenticated to the X server can overflow a global buffer via injecting large or malformed XKB atoms and accessing them through xkbcomp, leading to crashes and potential privilege elevation when run as root. Docu...

CVE-2017-13723

In X.Org Server aka xserver and xorg-server before 1.19.4, a local attacker authenticated to the X server could overflow a global buffer, causing crashes of the X server or potentially other problems by injecting large or malformed XKB related atoms and accessing them via xkbcomp...

CVE-2017-13721

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...

CVE-2017-13721

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...

CVE-2017-13723

In X.Org Server aka xserver and xorg-server before 1.19.4, a local attacker authenticated to the X server could overflow a global buffer, causing crashes of the X server or potentially other problems by injecting large or malformed XKB related atoms and accessing them via xkbcomp...