It was discovered that Exiv2 incorrectly handled certain files.
An attacker could possibly use this issue to cause a denial of service.
CVE-2017-9239 only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS.
(CVE-2017-11591, CVE-2017-11683, CVE-2017-14859, CVE-2017-14862,
CVE-2017-14864, CVE-2017-17669, CVE-2017-9239, CVE-2018-16336,
The problem can be corrected by updating your system to the following