Ubuntu Security Notice USN-3962-1
April 30, 2019
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 18.10
– Ubuntu 18.04 LTS
libpng be made to crash or run programs if it opened a specially crafted
– libpng1.6: PNG (Portable Network Graphics) file library
It was discovered that libpng incorrectly handled certain memory
operations. If a user or automated system were tricked into opening a
specially crafted PNG file, a remote attacker could use this issue to
cause libpng 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
Ubuntu 18.04 LTS:
In general, a standard system update will make all the necessary changes.