Ilja van Sprundel of IOActive discovered several security issues in multiple components of the X.org graphics stack and the related libraries: Various integer overflows, sign handling errors in integer conversions, buffer overflows, memory corruption and missing input sanitising may lead to privilege escalation or denial of service.

For the oldstable distribution (squeeze), these problems have been fixed in version 2:1.3.3-4+squeeze1. For the stable distribution (wheezy), these problems have been fixed in version 2:1.5.0-1+deb7u1. For the unstable distribution (sid), these problems have been fixed in version 2:1.5.0-1+deb7u1. We recommend that you upgrade your libx11 packages.

libX11 provides a client interface to the X Window System, otherwise known as 'Xlib'. It provides a complete API for the basic functions of the window system.

libx11 on Debian Linux

This check tests the installed software version using the apt package manager.

• http://www.debian.org/security/2013/dsa-2693.html

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Updated on 2015-03-25