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), this problem has been fixed in version 1.6-1+squeeze1. For the stable distribution (wheezy), this problem has been fixed in version 1.8.1-2+deb7u1. For the unstable distribution (sid), this problem has been fixed in version 1.8.1-2+deb7u1. We recommend that you upgrade your libxcb packages.

The XCB library provides an interface to the X Window System protocol, designed to replace the Xlib interface.

libxcb on Debian Linux

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

• http://www.debian.org/security/2013/dsa-2686.html

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Updated on 2015-03-25