Ubuntu 12.04 LTS / 14.04 LTS / 14.10 : xorg-server, xorg-server-lts-trusty, xorg-server-lts-utopic vulnerabilities (USN-2500-1)

Ubuntu Security Notice (C) 2015-2016 Canonical, Inc. / NASL script (C) 2015-2016 Tenable Network Security, Inc.


Synopsis :

The remote Ubuntu host is missing one or more security-related
patches.

Description :

Olivier Fourdan discovered that the X.Org X server incorrectly handled
XkbSetGeometry requests resulting in an information leak. An attacker
able to connect to an X server, either locally or remotely, could use
this issue to possibly obtain sensitive information. (CVE-2015-0255)

It was discovered that the X.Org X server incorrectly handled certain
trapezoids. An attacker able to connect to an X server, either locally
or remotely, could use this issue to possibly crash the server. This
issue only affected Ubuntu 12.04 LTS. (CVE-2013-6424).

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.

Solution :

Update the affected xserver-xorg-core, xserver-xorg-core-lts-trusty
and / or xserver-xorg-core-lts-utopic packages.

Risk factor :

Medium / CVSS Base Score : 6.4
(CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:P)
CVSS Temporal Score : 5.3
(CVSS2#E:F/RL:OF/RC:ND)
Public Exploit Available : true

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 81398 ()

Bugtraq ID: 64127
72578

CVE ID: CVE-2013-6424
CVE-2015-0255

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