[USN-2568-1] libx11, libxrender vulnerability

Type securityvulns
Reporter Securityvulns
Modified 2015-04-17T00:00:00


========================================================================== 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


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


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: 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: https://launchpad.net/ubuntu/+source/libxrender/1:0.9.6-2ubuntu0.2

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