Check the version of file
Please Install the Updated Packages.
It was discovered that file incorrectly handled certain CDF documents. A attacker could use this issue to cause file to hang or crash, resulting in a denial of service.
file on Ubuntu 14.04 LTS , Ubuntu 12.04 LTS , Ubuntu 10.04 LTS
Get the installed version with the help of detect NVT and check if the version is vulnerable or not.