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This bulletin was written by Vigil@nce : http://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

An attacker can create a malicious GIF image, to dereference a
NULL pointer in QtGui of Qt, in order to trigger a denial of
service.

Impacted products: Fedora, Unix (platform)

Severity: 2/4

Creation date: 28/04/2014

DESCRIPTION OF THE VULNERABILITY

The Qt product uses QtGui to decode GIF images.

However, the src/gui/image/qgifhandler.cpp file does not check if
a pointer is NULL, before using it.

An attacker can therefore create a malicious GIF image, to
dereference a NULL pointer in QtGui of Qt, in order to trigger a
denial of service.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/Qt-NULL-pointer-dereference-via-QtGui-GIF-14669