Ubuntu Update for qt4-x11 USN-2057-1

Solution
Please Install the Updated Packages.
Insight
It was discovered that QXmlSimpleReader in Qt incorrectly handled XML entity expansion. An attacker could use this flaw to cause Qt applications to consume large amounts of resources, resulting in a denial of service.
Affected
qt4-x11 on Ubuntu 13.10 , Ubuntu 13.04 , Ubuntu 12.10 , Ubuntu 12.04 LTS
References