GD library could be made to crash if it opened a specially crafted file.
It was discovered that the GD Graphics Library (aka libgd) incorrectly handled certain malformed PNG images. A remote attacker could use this issue to cause the GD Graphics Library to crash, resulting in a denial of service, or possibly execute arbitrary code.
5 September 2017
A security issue affects these releases of Ubuntu and its derivatives:
GD library could be made to crash if it opened a specially crafted file.
It was discovered that the GD Graphics Library (aka libgd) incorrectly handled certain malformed PNG images. A remote attacker could use this issue to cause the GD Graphics Library to crash, resulting in a denial of service, or possibly execute arbitrary code.
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.
Vulmon