Check the version of clamav
Please Install the Updated Packages.
Sebastian Andrzej Siewior discovered that ClamAV incorrectly handled certain upack packer files. An attacker could possibly use this issue to cause ClamAV to crash, resulting in a denial of service, or possibly execute arbitrary code.
clamav on Ubuntu 14.10 , Ubuntu 14.04 LTS , Ubuntu 12.04 LTS
Get the installed version with the help of detect NVT and check if the version is vulnerable or not.