==========================================================================
Ubuntu Security Notice USN-2568-1
April 13, 2015

libx11, libxrender vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

– Ubuntu 14.10
– Ubuntu 14.04 LTS
– Ubuntu 12.04 LTS

Summary:

libx11 could be made to crash or run programs if it processed specially
crafted data.

Software Description:
– libxrender: X11 Rendering Extension client library
– libx11: X11 client-side library

Details:

Abhishek Arya discovered that libX11 incorrectly handled memory in the
MakeBigReq macro. A remote attacker could use this issue to cause
applications to crash, resulting in a denial of service, or possibly
execute arbitrary code.

In addition, following the macro fix in libx11, a number of other packages
have also been rebuilt as security updates including libxrender, libxext,
libxi, libxfixes, libxrandr, libsdl1.2, libxv, libxp, and
xserver-xorg-video-vmware.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 14.10:
libxrender1 1:0.9.8-1build0.14.10.1

Ubuntu 14.04 LTS:
libxrender1 1:0.9.8-1build0.14.04.1

Ubuntu 12.04 LTS:
libx11-dev 2:1.4.99.1-0ubuntu2.3
libxrender1 1:0.9.6-2ubuntu0.2

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
http://www.ubuntu.com/usn/usn-2568-1
CVE-2013-7439

Package Information:
https://launchpad.net/ubuntu/+source/libxrender/1:0.9.8-1build0.14.10.1
https://launchpad.net/ubuntu/+source/libxrender/1:0.9.8-1build0.14.04.1
https://launchpad.net/ubuntu/+source/libx11/2:1.4.99.1-0ubuntu2.3
https://launchpad.net/ubuntu/+source/libxrender/1:0.9.6-2ubuntu0.2

—–BEGIN PGP SIGNATURE—–
Version: GnuPG v1
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=dHhs
—–END PGP SIGNATURE—–
—