Several security issues were fixed in GIMP.
It was discovered that GIMP incorrectly handled certain images. If a user were tricked into opening a specially crafted image, an attacker could possibly use this to execute arbitrary code. (CVE-2017-17784, CVE-2017-17785, CVE-2017-17786, CVE-2017-17787, CVE-2017-17788, CVE-2017-17789)
22 January 2018
A security issue affects these releases of Ubuntu and its derivatives:
Several security issues were fixed in GIMP.
It was discovered that GIMP incorrectly handled certain images. If a user were tricked into opening a specially crafted image, an attacker could possibly use this to execute arbitrary code. (CVE-2017-17784, CVE-2017-17785, CVE-2017-17786, CVE-2017-17787, CVE-2017-17788, CVE-2017-17789)
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.